Category: 102-09-0

Effect of mass transfer at the interface of the polymer solution and extruded solvent during the air gap on membrane structures and performances in TIPS process using triple-orifice spinneret was written by Fang, Chuanjie;Rajabzadeh, Saeid;Wu, Hao-Chen;Zhang, Xinyu;Kato, Noriaki;Kunimatsu, Misato;Yoshioka, Tomohisa;Matsuyama, Hideto. And the article was included in Journal of Membrane Science in 2020.Formula: C13H10O3 The following contents are mentioned in the article:

In this study, a combination of exptl. results and mol. dynamics (MD) simulation was employed to understand the mass transfer between the extruded solvent and polymer solution by using a triple-orifice spinneret in the thermally induced phase separation (TIPS) process. Extruding solvent at the outer layer of the extruded polymer solution with different air gap distances controlled the mass transfer before phase separation The progressive change in the phase separation mechanism, from the liquid-liquid to the solid-liquid induced by mass transfer, played a determined role in tailoring the composite-like structure. The moving of polymer or diluent from the bulk solution to the contact interface changed the polymer surface concentration and subsequently affected the membrane surface pore structure. The MD calculation results elucidated the mass transfer of the solvent and the polymer solution, which drastically affected the membrane structure. The formed spherulite-embedded bicontinuous structure clearly improved the membrane water permeation stability from 52 to 98%. On the other hand, by altering the air gap distances, the membrane water permeation flux enhanced in a wide range from 266 to 1429 L m^-2 h^-1 bar^-1. A new relationship between permeation flux and permeation stability was obtained, which can be utilized as a guideline for the engineering of hollow fiber membranes with high and stable permeability in the TIPS process. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Formula: C13H10O3).

Diphenyl carbonate (cas: 102-09-0) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Formula: C13H10O3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Efficient synthesis of isosorbide-based polycarbonate with scalable dicationic ionic liquid catalysts by balancing the reactivity of the endo-OH and exo-OH was written by Wang, Weiwei;Zhang, Yaqin;Yang, Zifeng;Zhang, Zhencai;Fang, Wenjuan;Niu, Donghui;He, Hongyan;Xu, Fei. And the article was included in Green Chemistry in 2021.Category: esters-buliding-blocks The following contents are mentioned in the article:

In this study, a series of high-activity imidazole-based dicationic ionic liquids (DILs) were designed and prepared as efficient catalysts for balancing the reactivity between the endo-hydroxyl group (endo-OH) and the exo-hydroxyl group (exo-OH) of isosorbide (ISO) to synthesize high mol. weight poly(isosorbide carbonate) (PIC). Meanwhile, the thermal performance of PIC was precisely optimized by regulating the chain configuration. When the trace amounts (4.5 x 10^-5 based on the ISO molar amount) of bis-(3-methyl-1-imidazole)-ethylene dibromide ([C₂(Min)₂][Br]₂) were used, the weight average mol. weight (M_w) of PIC reached 98 700 g mol^-1. It could be concluded from the results of the experiment and the stimulation that the high catalytic activity of DILs was attributed to the strong electrostatic interaction between the cation and the substrate and the effective balance of the reactivity of the endo-OH and the exo-OH. Furthermore, we found that the reduction of hydroxyl groups in the terminal groups and the increase of endo-endo (a₁) structure in the repeating unit improved the thermal properties of PIC. Finally, ¹H NMR, Fourier IR spectroscopy, and d. functional theory (DFT) calculations were used to verify the reaction process through anion and cation multi-site synergistic effect and a possible electrophilic-nucleophilic reaction mechanism was successfully obtained. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Category: esters-buliding-blocks).

Diphenyl carbonate (cas: 102-09-0) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Category: esters-buliding-blocks

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Effect of mixed diluents during thermally induced phase separation process on structures and performances of hollow fiber membranes prepared using triple-orifice spinneret was written by Fang, Chuanjie;Rajabzadeh, Saeid;Liu, Wenyi;Wu, Hao-Chen;Kato, Noriaki;Sun, Yuchen;Jeon, Sungil;Matsuyama, Hideto. And the article was included in Journal of Membrane Science in 2020.Safety of Diphenyl carbonate The following contents are mentioned in the article:

In this study, polyvinylidene fluoride hollow fiber membranes were prepared using a triple-orifice spinneret in thermally induced phase separation A solvent, propylene carbonate (PC), was extruded through the outermost layer of the spinneret. Through the use of this method, all the membranes were developed an entirely porous surface with similar pore size and porosity. Using mixed diluents with different concentrations of di-Ph carbonate and PC, the membrane bulk structures were controlled from an entirely bicontinuous network, a combination of bicontinuous and spherulitic structures, to an entirely spherulitic structure. The tailored bulk structures showed significant effects on the permeability, rejection, and mech. strength of the membrane. Furthermore, the membrane sub-layer structure was modified to form different types from the composite-like structure of the combination of the spherulites and bicontinuous network to entirely spherulites, which controlled the membrane permeation stability within an extensive range of 6% to nearly 100%. A change in the polymeric dope solution phase diagram, as well as the interfacial behaviors of the polymeric dope solution and extruded PC, played important roles in appropriately tailoring membrane structures and performances. These novel and solid findings regarding the connections between structures and performances provide an advisable venue for the design of hollow fiber membranes with satisfactory performances. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Safety of Diphenyl carbonate).

Diphenyl carbonate (cas: 102-09-0) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Safety of Diphenyl carbonate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Facile way of dynamically tailoring microporous structures in polyvinylidene fluoride films prepared by thermally induced phase separation was written by Yang, Bin;Chen, Qinting;Ding, Mengya;Pan, Yang;Zhang, Peng;Wang, Shuqing;Qian, Jiasheng;Miao, Jibin;Xia, Ru;Chen, Peng;Shi, You;Tu, Youlei. And the article was included in Journal of Polymer Science (Hoboken, NJ, United States) in 2021.Product Details of 102-09-0 The following contents are mentioned in the article:

Polyvinylidene fluoride (PVDF) films were prepared via thermally induced phase separation (TIPS) using di-Ph carbonate as the diluter in an attempt to disclose the competitive relationship between crystal growth and droplet growth during phase separation process. By varying the quenching temperature different temperature gradient fields were established, which were theor. evaluated via enthalpy transformation method. The effects of polymer concentration and quenching temperature on evolution of hierarchical morphologies in TIPS films were systematically investigated. According to the morphol. characteristics, the cross-sectional morphol. of the films with lower polymer concentration (Φ_P = 25%) could be divided into three layers; while that of higher polymer concentration counterpart (Φ_P = 55%) only presented a bi-layered structure. The reason for this could be ascribed to the effect of cooling rate on both crystal growth and droplet growth during TIPS process, which further determined the formation of the hierarchical structure in microporous films. With an increasing quenching temperature, both pore size and porosity of PVDF films increased, accompanied by an improvement on both thermal stability and dynamic mech. thermal property. The present study could insightfully supply a facile route to fabricate structure-controllable microporous films of crystalline polymers via an appropriate regulation of the TIPS quenching parameters. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Product Details of 102-09-0).

Diphenyl carbonate (cas: 102-09-0) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Product Details of 102-09-0

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Novel hollow hierarchical Pb-Mg thin nanosheet catalyst with high performance for solvent-free synthesis of methyl phenyl carbonate was written by Wang, Songlin;Jiang, Nan;Liu, Yanyan;Hao, Yan;Zhang, Qiying;Niu, Hongying;Wang, Jianji. And the article was included in Colloids and Surfaces, A: Physicochemical and Engineering Aspects in 2022.COA of Formula: C13H10O3 The following contents are mentioned in the article:

Me Ph carbonate (MPC) is a versatile carbonate, particularly as an important component in the lithium-ion battery industry. Recently the green synthesis of carbonates from non-toxic feedstocks and efficient catalysts have attracted a considerable amount of interest but the development of a highly active catalyst for this synthesis is a great challenge. Herein, novel Pb-Mg thin nanosheet catalysts with high specific areas and large pore volumes were developed by one-pot hydrothermal approach for the synthesis of MPC without using any solvent. The nanosheets were thoroughly characterized by SEM-EDS, TEM, XPS, NH₃-TPD, XRD, BET, and H₂-TPR techniques. It is shown that a di-Ph carbonate (DPC) conversion of 56.6% and an MPC selectivity of 98.8% are achieved by a Pb-Mg nanosheet catalyst with 15 wt% Pb. The activity and selectivity values are significantly higher than the previous best value reported by using transition metal-based catalysts. After the reaction, the nanosheets can be separated by simple centrifugation and can be reused many times without a significant loss of catalytic activity, showing excellent stability and recyclability. A possible mechanism was investigated based on these results. This work provides new insight into accomplishing the efficient and green synthesis of MPC and offers a strategy for synthesizing other asym. carbonates. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0COA of Formula: C13H10O3).

Diphenyl carbonate (cas: 102-09-0) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Cyclic esters are called lactones, regardless of whether they are derived from an organic or inorganic acid. One example of an organic lactone is 纬-valerolactone.COA of Formula: C13H10O3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Fully Recyclable Polycarbonates from Simple, Bio-Derived Building Blocks was written by Roland, Christopher D.;Moore, Cameron M.;Leal, Juan H.;Semelsberger, Troy A.;Snyder, Charlotte;Kostal, Jakub;Sutton, Andrew D.. And the article was included in ACS Applied Polymer Materials in 2021.HPLC of Formula: 102-09-0 The following contents are mentioned in the article:

Plastic buildup and accumulation in the environment are an increasingly large problem facing civilization. Petroleum-based plastics can exist for hundreds to thousands of years in the environment, destroying habitats and polluting water. Environmentally conscious replacements for plastics are urgently needed. In this publication, we present a biobased alternative to petroleum-based polycarbonates. Using a diol monomer derived from glycerol and glycerol products, we have synthesized aliphatic polycarbonates with comparable phys. properties to petroleum-based incumbents. The polymer can be quant. depolymerized using warm methanol to recover the monomer which can be repolymd. multiple times, or alternatively, the monomer, which is inherently nontoxic, can slowly break apart to the original components. This provides two end-of-life options for this material recycle or decomposition under environmental conditions to benign building blocks, thus providing a potential pathway to avoid environmental and bioaccumulation of plastics. We also demonstrate the ability to selectively recover the monomer from a simulated mixed-plastic waste environment; the monomer recovered this way functions identically to the virgin monomer after purification This work represents an important step in the progress toward environmentally conscious polymer design with multiple end-of-life options. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0HPLC of Formula: 102-09-0).

Diphenyl carbonate (cas: 102-09-0) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.HPLC of Formula: 102-09-0

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Synthesis and Spectroscopic Analyses of New Polycarbonates Based on Bisphenol A-Free Components was written by Wnuczek, Krystyna;Puszka, Andrzej;Podkoscielna, Beata. And the article was included in Polymers (Basel, Switzerland) in 2021.Safety of Diphenyl carbonate The following contents are mentioned in the article:

This paper discusses a new synthesis of bisphenol A-free polycarbonates based on four aliphatic-aromatic systems. In the first stage, different types of monomers (with/without sulfur) derived from diphenylmethane were synthesized. Then, new polycarbonates were prepared in the reactions with di-Ph carbonate (DPC) by transesterification and polycondensation reactions. Three different catalysts (zinc acetate, 4-(dimethylamino)pyridine and benzyltriethylammonium chloride) were tested. The structures of the compounds were confirmed by Nuclear Mol. Resonance spectroscopy (NMR) in each stage. The chem. structures of the obtained polycarbonates were verified by means of Attenuated Total Reflectance Fourier Transform IR spectroscopy (ATR-FTIR). The presence of a carbonyl group in the IR spectrum confirmed polycarbonate formation. Thermal studies by differential scanning calorimetry (DSC) were carried out to determine the melting temperatures of the monomers. A gel permeation chromatog. anal. (GPC) of the polycarbonates was performed in order to investigate their molar masses. Thermal anal. proved the purity of the obtained monomers; the curves showed a characteristic signal of melting. The obtained polycarbonates were characterized as having high resistance to organic solvents, including THF. The GPC anal. proved their relatively large molar masses and their low dispersity. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Safety of Diphenyl carbonate).

Diphenyl carbonate (cas: 102-09-0) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.Safety of Diphenyl carbonate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

ROS-Responsive Selenium-Containing Carriers for Coencapsulation of Photosensitizer and Hypoxia-Activated Prodrug and Their Cellular Behaviors was written by Song, Fangqin;Li, Siqi;Sun, Chuanhao;Ji, Ying;Zhang, Yan. And the article was included in Macromolecular Bioscience in 2021.Recommanded Product: Diphenyl carbonate The following contents are mentioned in the article:

The integration of hypoxia-activated chemotherapy with photodynamic therapy (PDT) has newly become a potent strategy for tumor treatment. Herein, a reactive oxygen species (ROS)-responsive drug carriers (PS@AQ4N/mPEG-b-PSe NPs) are fabricated based on the amphiphilic selenium-containing methoxy poly(ethylene glycol)-polycarbonate (mPEG-b-PSe), the hydrophobic photosensitizer (PS), and hypoxia-activated prodrug Banoxantrone (AQ4N). The obtained nanoparticles are spherical with an average diameter of 100 nm as characterized by transmission electron microscope (TEM) and dynamic laser scattering (DLS) resp. The encapsulation efficiency of the PS and AQ4N reaches 92.83% and 51.04% at different conditions, resp., by UV-vis spectrophotometer. It is found that the drug release is accelerated due to the good ROS responsiveness of mPEG-b-PSe and the cumulative release of AQ4N is up to 89% within 30 h. The cell test demonstrates that the nanoparticles dissociate when triggered by the ROS stimuli in the cancer cells, thus the PS is exposed to more oxygen and the ROS generation efficiency is enhanced accordingly. The consumption of oxygen during PDT leads to the increased tumor hypoxia, and subsequently activates AQ4N into cytotoxic counterpart to inhibit tumor growth. Therefore, the synergistic therapeutic efficacy demonstrates this drug delivery has great potential for antitumor therapy. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Recommanded Product: Diphenyl carbonate).

Diphenyl carbonate (cas: 102-09-0) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Esters contain a carbonyl center, which gives rise to 120掳 C鈥揅鈥揙 and O鈥揅鈥揙 angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C鈥揙鈥揅 bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Recommanded Product: Diphenyl carbonate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Recent Advances in Catalyst Development for Transesterification of Dialkyl Carbonates with Phenol was written by Song, Ziwei;Jin, Wei;Gao, Faming;Jin, Xin. And the article was included in Industrial & Engineering Chemistry Research in 2020.Quality Control of Diphenyl carbonate The following contents are mentioned in the article:

A review. Synthesis of di-Ph carbonate (DPC) from di-Me carbonate (DMC) with phenol is the most prominent application of transesterification of dialkyl carbonates (DACs); this is a significant step for the nonphosgene manufacturing of polycarbonate, which is considered to be one of the best examples of green and sustainable transformations available on such a large scale. In the last decades, extensive efforts have been focusing on atom efficiency, increased safety, waste avoidance, and other process improvements for the transesterification synthesis of DPC. However, low product selectivity, separation, and catalyst deactivation remain bottlenecks of the process, despite recent significant progress. Therefore, the present interest focuses on rational design of highly efficient and stable catalysts. However, there is still a lack of a comprehensive summary on catalyst design and mechanism involved. Therefore, in this work, transesterification of DMC with phenol has been critically revised as a model case, to illustrate the structure-performance correlation and reaction pathways for transesterification with phenols. In this perspective, recent advances on exptl. and investigations on rational design of heterogeneous catalysts, for facile liquid-phase reaction of DMC with phenol, have been systematically discussed, in terms of catalyst synthesis, surface characterization, and structure-function relationship. More importantly, plausible mechanisms for transesterification of DMC with phenol will be systematically discussed with the aim to provide insights into fundamental understanding on transesterification chem. and improvement of activity, selectivity, and stability of these catalytic materials. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Quality Control of Diphenyl carbonate).

Diphenyl carbonate (cas: 102-09-0) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Esters contain a carbonyl center, which gives rise to 120掳 C鈥揅鈥揙 and O鈥揅鈥揙 angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C鈥揙鈥揅 bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Quality Control of Diphenyl carbonate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Chemoselective transesterification and polymer synthesis using a zincate complex was written by Oshimura, Miyuki. And the article was included in Polymer Journal (Tokyo, Japan) in 2021.Product Details of 102-09-0 The following contents are mentioned in the article:

A review. In this focused review, I present an overview of our recent research on the zincate complex dilithium tetra-tert-butylzincate (TBZL)-catalyzed ring-opening polymerization (ROP) of 蔚-caprolactone, efficient acylation and transesterification of alcs. with vinyl acetate and carboxylic esters, and polymer synthesis with a high transesterification ability. In the first part of this report, the ROP of 蔚-caprolactone catalyzed by TBZL in toluene is described. In a subsequent study of the ROP of 蔚-caprolactone in the presence of 2-hydroxyethyl methacrylate (HEMA), TBZL was found to act not only as an anionic initiator but also as a transesterification catalyst. In the second part of this report, the acylation and transesterification of alcs. with vinyl acetate and carboxylic esters catalyzed by TBZL are summarized. The acylation proceeded quant. at 0掳C within 1 h. A wide range of combinations of esters and alcs. were suitable for the transesterification at 0 to -40掳C. In addition, the transesterification proceeded chemoselectively even in the presence of H₂O and amines. Next, TBZL-catalyzed polycondensations of di-Ph carbonate (DPC) with diols are discussed. Irreversible polycondensations catalyzed by TBZL occurred to yield aliphatic polycarbonates under atm. pressure. In the last part of this report, the transesterifications of poly(Ph methacrylate) (PPhMA) side chains with alcs. catalyzed by TBZL are described. The transesterification reaction not only with alkyl alcs. but also with fluoroalcs. occurred. By changing the reaction solvent and temperature, the degree of conversion could be controlled. The present system permits the partial, quant., or terminal conversion of polymethacrylates. This study involved multiple reactions and reactants, such as Diphenyl carbonate (cas: 102-09-0Product Details of 102-09-0).

Diphenyl carbonate (cas: 102-09-0) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits. Esters contain a carbonyl center, which gives rise to 120掳 C鈥揅鈥揙 and O鈥揅鈥揙 angles. Unlike amides, esters are structurally flexible functional groups because rotation about the C鈥揙鈥揅 bonds has a low barrier. Their flexibility and low polarity is manifested in their physical properties; they tend to be less rigid (lower melting point) and more volatile (lower boiling point) than the corresponding amides. Product Details of 102-09-0

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics