Tag: M.W=250-300

Qi, Yujie published the artcileHigh-efficient lignin-based polymerizable macromolecular photoinitiator with UV-blocking property for visible light polymerization, SDS of cas: 15625-89-5, the publication is International Journal of Biological Macromolecules (2022), 234-244, database is CAplus and MEDLINE.

Developing high-efficient visible light macromol. photoinitiator (macro PI) with excellent initiation performance, low migration, high biosafety and multi-function is beneficial to broaden the application of photopolymer. Lignin contains chromophores which could generate free radicals under light irradiation In this study, a lignin-based polymerizable macro PI (DAL-11ene-amine) was designed and synthesized through covalent grafting 10-undecenoyl chloride (11ene) and hydrogen donor 4-(dimethylaminobenzoic acid) Et ester (EDAB) into dealkaline lignin (DAL) skeleton. The structure of DAL-11ene-amine was characterized by UV-vis, FTIR, ¹H NMR, GPC, and ³¹P NMR spectra. Under the irradiation of a 405 nm LED, DAL-11ene-amine can directly produce active species and initiate the polymerization of acrylate monomers or thiol-ene click reaction. The photoinitiation efficiency of DAL-11ene-amine is higher than that of DAL-11ene or the two-component combination of DAL-11ene and EDAB. Using DAL-11ene-amine as PI, the prepared polymer films exhibit excellent UV-blocking property. With only 0.5 weight% addition of DAL-11ene-amine, nearly 100% of UVB + UVC and the most of UVA can be blocked by the films. Moreover, DAL-11ene-amine exhibits higher migration stability and biosafety because it can be covalently linked into polymer crosslinking networks. The results indicate that DAL-11ene-amine has great application potentials in preparing environmentally friendly UV-blocking films and biosafety coatings.

International Journal of Biological Macromolecules published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C15H20O6, SDS of cas: 15625-89-5.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Meng, Qiaoyu published the artcileThermal shock resistance study of stereolithographic additive-manufactured Al₂O₃ ceramics by in situ digital radiography, Name: Trimethylolpropane triacrylate, the publication is Ceramics International, database is CAplus.

Thermal shock resistance is critical to ensure the service safety of ceramic hot-end components. The thermal shock performance of stereolithog. additive-manufactured ceramics has not yet been studied. In this study, a series of thermal shock experiments with various temperature differences was conducted on stereolithog. additive-manufactured Al₂O₃ ceramics. The surface cracks were analyzed based on photographs captured before and after the thermal shock experiments Three-point bending tests with in situ X-ray digital radiog. were conducted to determine the thermal shock resistance. Crack initiation, propagation, and coalescence were observed under flexural loads. The critical temperature difference of the stereolithog. additive-manufactured Al₂O₃ ceramics was determined to be 267.22 °C. The crack length increased and residual strength decreased with increasing temperature differences. The layered structure of the stereolithog. additive-manufactured ceramics slowed crack propagation. We expect that this study will serve as a reference for the performance of stereolithog. additive-manufactured Al₂O₃ ceramics in extreme environments.

Ceramics International published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C15H20O6, Name: Trimethylolpropane triacrylate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Rochais, Christophe published the artcileOne-pot synthesis of new aza- and diaza-aminophenanthrenes, Safety of Methyl 2-(2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)acetate, the publication is Tetrahedron (2011), 67(32), 5806-5810, database is CAplus.

The synthesis of a series of benzo(iso)quinoline and phenanthroline derivatives has been achieved using an efficient one-pot procedure. It proceeds through a Suzuki-Miyaura cross-coupling followed by a Dieckmann-Thorpe ring closure under microwave irradiation and provides easy access to building blocks not readily available through other methods.

Tetrahedron published new progress about 956229-86-0. 956229-86-0 belongs to esters-buliding-blocks, auxiliary class Boronic acid and ester,Benzene,Ester,Boronate Esters,Boronic acid and ester, name is Methyl 2-(2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)acetate, and the molecular formula is C15H21BO4, Safety of Methyl 2-(2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)acetate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Mo, Yuan published the artcilePhoto-curing of thick monomer systems with photoluminescent ZnO nanoparticles photoinitiators, Formula: C15H20O6, the publication is Progress in Organic Coatings (2022), 106788, database is CAplus.

The photo-curing of thick monomer systems or coatings had often been limited to the depth of a few microns to few millimeters. In order to overcome this difficult problem, the ZnO nanoparticles (NPs) were researched to improve the photo-curing depth because that ZnO had the function of the photoluminescent upon the light irradiation The light emitted by ZnO NPs penetrated into the deeper layers to increase the photo-curing depth. The best co-photoinitiator, bis (2,4,6-trimethylbenzoyl) Ph phosphine oxide (819), in the monomer 1, 6-hexanediol diacrylate, were determined by the UV-visible spectrophotometer and fluorescence spectrophotometer. A photo-curing depth of 16.7 mm was achieved by the combination of ZnO NPs and bis (2,4,6-trimethylbenzoyl) Ph phosphine oxide (819) in 1, 6-hexanediol diacrylate. In addition, an exptl. model was proposed, the influence factors were systematically studied, and the exptl. equations related to the different factors and photo-curing depths were determined by controlling the different variables. With different variables, the maximum top layer double bond conversion of 77%, and the maximum bottom layer double bond conversion of 55%. This investigation confirmed that the photoluminescent ZnO NPs had a function of improving the photo-curing depth. Therefore, this investigation provided a new idea and method for the photo-curing of thick monomer systems and coatings.

Progress in Organic Coatings published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C15H20O6, Formula: C15H20O6.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Yuan, Jiajia published the artcileFabricating superhydrophobic surfaces via coating amine-containing fluorinated emulsion and Michael addition reaction, Safety of Trimethylolpropane triacrylate, the publication is Journal of Coatings Technology and Research (2022), 19(4), 1187-1198, database is CAplus.

In this work, highly fluorinated acrylate emulsions with reliable stability emulsified by protonated octadecylamine were successfully synthesized. With appropriate protonation, the obtained emulsion showed high monomer conversions up to 90.2% and ultralow surface energy. The ultralow-surface-energy coatings were fabricated via surface enrichment of abundant fluorine and replacing hydrophilic amino groups with hydrophobic groups through the Michael addition reaction. Superhydrophobic and self-cleaning surfaces were prepared on porous substrates through dip coating. When fabricated on porous glass fiber nonwoven mats, surfaces coated with enriching fluorinated side chains and few hydrophilic groups showed remarkable superhydrophobicity with a water contact angle more than 150° and a low sliding contact angle of 4.7°. The usage of fluorinated emulsions was sharply reduced due to the addition of perfluorinated acrylate. Moreover, the Michael acceptors were alternative such as perfluorinaed acrylates, long aliphatic acrylates and crosslinking acrylates, displaying superior hydrophobicity and waterproof properties. All the results conclusively indicated that this practical modified method was promising for potential applications of hydrophobic modifications. Graphical abstract: [graphic not available: see fulltext].

Journal of Coatings Technology and Research published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C9H21NO3, Safety of Trimethylolpropane triacrylate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Zou, Wenjing published the artcileImproving cure performance of Si₃N₄ suspension with a high refractive index resin for stereolithography-based additive manufacturing, COA of Formula: C15H20O6, the publication is Ceramics International (2022), 48(9), 12569-12577, database is CAplus.

Silicon nitride (Si₃N₄) slurries with high solid loading, low viscosity and good stability is difficulty prepared, due to low intrinsic surface charge and a large refractive index (RI) difference between Si₃N₄ powder and resin. In this paper, the curing behavior of Si₃N₄ slurry with different functional group and RI of resin monomer were systematically researched, and then the kind and optimum content of dispersant were investigated. Subsequently, a high solid loading Si₃N₄ slurry (44 vol%) with good curing behavior, low viscosity and favorable stability was successfully prepared Lastly, the dense Si₃N₄ ceramic parts were fabricated by the suitable Si₃N₄ slurry (44 vol%) via stereolithog. After debinding and sintering process, the relative d. and flexural strength of Si₃N₄ ceramic were 98.28% and 800 ± 27.28 Mpa, resp.

Ceramics International published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C10H10O6, COA of Formula: C15H20O6.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Zhou, Shixiang published the artcileStrengthening PPy/TiO₂ arrayed SiOC honeycombs for self-protective gas sensing, Synthetic Route of 15625-89-5, the publication is Composites, Part B: Engineering (2022), 109536, database is CAplus.

As the operation reliability for gas sensors under complex environments is in increasing demand, the stability and safety performance are significant besides qualified gas sensing properties. In this work, structural-strengthened and self-protective ammonia sensing micro-tunnels were constructed by 3D printing. Modified methyl-silsesquioxane (MK) resin was employed as the feedstock to build the SiOC honeycomb structures. Polypyrrole (PPy) nanoparticle decorated TiO₂ arrays sensitized the structures to form inner gas-sensitive tunnels. The sensing structure exhibited high selectivity toward ammonia at room temperature Response to 50 ppm NH3 was 18.67%, while the response and recovery times were 119 and 86 s, resp. The excellent long-term stability also ensured reliable operation in complex environments. More importantly, the enhanced honeycomb had an outstanding mech. performance with the compressive strength, Young′s modulus, and energy absorption of 33.72 MPa, 2.40 GPa, and 28.22 kJ/m³, resp. It can serve as a load-bearing part of the fundamental component to avoid catastrophic collapse while maintaining a regular sensing capability under pressure loading as the excellent deformation resistance ensured the integrity and connection of the sensing layer. Moreover, the inner through-holes facilitated the exposure of the sensing tunnels to the atm., which can detect target gas simultaneously without the embedding of extra sensors. Thus, the construction of self-protective gas sensing structures was promising to be an efficient strategy for reliable gas detection in extreme environments.

Composites, Part B: Engineering published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C5H5BrN2, Synthetic Route of 15625-89-5.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Zhou, Kaixiang published the artcileSynthesis and Evaluation of Fluorine-18 Labeled 2-Phenylquinoxaline Derivatives as Potential Tau Imaging Agents, SDS of cas: 115314-17-5, the publication is Molecular Pharmaceutics (2021), 18(3), 1176-1195, database is CAplus and MEDLINE.

In this study, three pairs of optically pure ¹⁸F-labeled 2-phenylquinoxaline derivatives were evaluated as Tau imaging agents for the diagnosis of Alzheimer’s disease (AD). The chiral 2-fluoromethyl-1,2-ethylenediol side chain was attached to the 2-phenylquinoxaline backbone to increase hydrophilicity, thereby improving the binding affinity of the probe to tangles and their selectivity toward Tau tangles over β-amyloid plaques (Aβ). These probes displayed excellent fluorescent properties and high selectivity for tangles on brain sections from transgenic mice (rTg4510) and AD patients. Quant. binding assays with AD homogenates showed that the probes (R)-I and (S)-II have a high affinity (K_i = 4.1 and 10.3 nM, resp.) and high selectivity (30.5-fold and 34.6-fold, resp.) for tangles over Aβ. The high affinity and selectivity of (R)-[¹⁸F]I and (S)-[¹⁸F]II for tangles were further confirmed with autoradiog. on AD brain tissue in vitro. In addition, they displayed sufficient blood-brain barrier penetration (7.06% and 10.95% ID/g, resp.) and suitable brain kinetics (brain_2 min/brain_60 min = 10.1, 6.5 resp.) in normal mice. Ex vivo metabolism studies and micro-positron emission computed tomog. (PET) revealed high brain biostability, good brain kinetic properties, and low nonspecific binding for (S)-[¹⁸F]II. Together, these results demonstrate that (R)-[¹⁸F]I and (S)-[¹⁸F]II are promising PET probes for Tau tangles imaging.

Molecular Pharmaceutics published new progress about 115314-17-5. 115314-17-5 belongs to esters-buliding-blocks, auxiliary class Epoxides,Chiral,Nitro Compound,Sulfonate,Benzene, name is (R)-Oxiran-2-ylmethyl 3-nitrobenzenesulfonate, and the molecular formula is C18H17NO8, SDS of cas: 115314-17-5.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Li, Zebei published the artcileDirect Ink Writing of Porous Ti6Al4V Alloys via UV Light Curing, Safety of Trimethylolpropane triacrylate, the publication is Advanced Engineering Materials, database is CAplus.

Although 3D printing of titanium alloys is often obtained by laser fusion deposition, its cost is relatively high. In this study, one light-curing-assisted technique is designed to print porous Ti6Al4V alloys via direct ink writing (DIW). For printing, titanium alloy slurry with 45 vol% solid content is prepared based on 1,6-hexanediol diacrylate monomer-trimethylolpropane triacrylate monomer (HDDA-TMPTA) photosensitive system. In such a case, the extruded filament was in situ cured under the action of UV light irradiation in the printing process. The printed lattice sample has good surface performance without the observation of a collapse. After sintering, the shrinkage percentage is around 16% in the horizontal direction and 19% in the vertical direction. Surface morphol. does not change significantly. Through comparative tests, it is found that the sintered samples have good microstructure and mech. properties. When the filling rate is 50%, the compressive strength could reach 604.7 MPa and the flexural strength is 106.8 MPa. The feasibility of this new printing method to prepare titanium alloy parts are confirmed.

Advanced Engineering Materials published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C15H20O6, Safety of Trimethylolpropane triacrylate.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Wang, Jun published the artcileIn Situ Compatibilization of Isotactic Polypropylene and High-Density Polyethylene by a Melt Cobranching Reaction, Computed Properties of 15625-89-5, the publication is Journal of Polymers and the Environment (2022), 30(3), 1127-1140, database is CAplus.

Incompatible polypropylene (PP) and polyethylene (PE) are difficult to sep. in mixed recycling streams such as waste plastic packaging, which makes polyolefin mixtures unsuitable for high-quality products. In this work, based on the free radical branching reaction, a co-branching reaction of isotactic polypropylene (iPP) and high-d. polyethylene (HDPE) blends was carried out in the presence of the peroxide, free radical regulator and multifunctional acrylate monomer, and a star-like long-chain branching (LCB) copolymer was obtained. The effect of in situ compatibilization on the structures and mech. properties of iPP/HDPE was investigated, and the compatibilization mechanism was discussed. Results showed that the mech. properties of the modified blends were largely improved, and efficient in-situ compatibilization of iPP and HDPE could be taken place in a wide process window. Moreover, the sizes of the dispersed phase in the modified blends were clearly decreased, and the interfacial thickness increased. Compared with the pure iPP/HDPE blend, the initial crystallization temperature of iPP in the modified iPP/HDPE blend was increased, and long branched chains of the LCB copolymers were phys. entangled with the chem. identical homopolymers or even participated in the crystallization of iPP and HDPE. Thanks to the in situ compatibilization strategy, the compatibility of iPP/HDPE was significantly improved.

Journal of Polymers and the Environment published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C13H10O2, Computed Properties of 15625-89-5.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics