Tag: M.W=600-700

Xia, Min-Qiang published the artcileThe relation between chemical structure of branched amide nucleating agents and nucleation effect in isotactic polypropylene, Quality Control of 31570-04-4, the publication is Journal of Thermal Analysis and Calorimetry (2021), 145(6), 3053-3066, database is CAplus.

The relation between chem. structure of branched amide compounds as nucleating agents and the nucleation effect of them in isotactic polypropylene (iPP) was investigated through studying the crystallization and melting behavior of iPP nucleated with these nucleating agents by differential scanning calorimetry (DSC). The crystallization peak temperature (T_c) of nucleated iPP had different degrees of increase after the amide groups were introduced into the benzene ring. The nucleation efficiency of 1,3,5-benzenetrisamide was superior to that of terephthalamide due to the existence of benzamide. At the same time, the nucleation effect of different side chain-substituted amide compounds on iPP was investigated. The results showed that the crystallization peak temperature of iPP nucleated with ring-substituted amides was higher than that of iPP nucleated with chain-substituted amides, that of the 6-membered ring-substituted amides was better than that of the five-membered ring-substituted amides and that of the cyclohexyl group substitution was superior to that of the benzene ring. Besides, the amide compounds with different central group were also studied as iPP nucleating agents. The results show that the sequence of nucleating efficiency from high to low is six carbons > benzene > ten carbons. Under the optimum content of BTA-CP, BTA-TP and BTA-IP, the crystallization peak temperature of nucleated iPP was increased from 117.6°C of pure iPP to 127.2°C, 125.7°C and 123.4°C, resp.

Journal of Thermal Analysis and Calorimetry published new progress about 31570-04-4. 31570-04-4 belongs to esters-buliding-blocks, auxiliary class Mono-phosphine Ligands, name is Tris(2,4-di-tert-butylphenyl) phosphite, and the molecular formula is C7H8BrClFN, Quality Control of 31570-04-4.

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

Wang, Zi-Qiang published the artcileEffect of sodium lignosulfonate/nano calcium carbonate composite filler on properties of isotactic polypropylene, SDS of cas: 31570-04-4, the publication is Polymer Bulletin (Heidelberg, Germany), database is CAplus.

A novel composite filler sodium lignosulfonate/nano calcium carbonate (SL/CaCO₃) was prepared by dry ball milling. Thermogravimetric anal. revealed that the composite filler SL/CaCO₃ had improved thermal properties. The crystallization and melting behavior of isotactic polypropylene (iPP) modified by the composite filler was studied by differential scanning calorimetry. The best complex ratio (1:3) and optimal addition amount (2 weight%) of iPP nucleated by SL/CaCO₃ were confirmed. The results reflected that a small amount of SL/CaCO₃ into iPP could improve the nucleation ability, and excellent mech. properties were obtained. The relative contents of β-crystals (K_β) in iPP were above 0.83 after addition of the composite filler. At the same time, nano CaCO₃ played a significant role in crystallizing the iPP nucleated and greatly influenced the content of β-crystals. The elongation at break was increased by 32.27% and the impact strength was increased by 62.38% compared to those of pure iPP.

Polymer Bulletin (Heidelberg, Germany) published new progress about 31570-04-4. 31570-04-4 belongs to esters-buliding-blocks, auxiliary class Mono-phosphine Ligands, name is Tris(2,4-di-tert-butylphenyl) phosphite, and the molecular formula is C7H13NO2, SDS of cas: 31570-04-4.

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

Tian, Xiao-Shuang published the artcileEffect of char-forming agents rich in tertiary carbon on flame retardant properties of polypropylene, Safety of Tris(2,4-di-tert-butylphenyl) phosphite, the publication is Journal of Thermal Analysis and Calorimetry, database is CAplus.

In this research, a novel type of triazine-based char-forming agent (PTPA) was synthesized and combined with ammonium polyphosphate (APP) to form an intumescent flame retardant (IFR) system to prevent polypropylene (PP) burning. A commercialized char-forming agent was purchased and the same process was used to study its flame retardant performance on polypropylene, and the results were compared with those of this experiment It was found that the PP/IFR samples in this experiment (APP/PTPA = 4/1-1/1) reached the increased limiting oxygen index (LOI) value of 29.5%, and passed the vertical combustion (UL-94) V-0 rating. The maximum LOI for the purchase of char-forming agent is 31.0%. Thermogravimetric anal. results show that the PTPA/APP system can improve the thermal stability and thermal oxidation stability of carbon slag. The carbon residue was further studied by visual observation and SEM. The dense coke residues formed hinder the transfer of gas and heat during the combustion process, and ultimately endow the PP/IFR system with higher flame retardancy.

Journal of Thermal Analysis and Calorimetry published new progress about 31570-04-4. 31570-04-4 belongs to esters-buliding-blocks, auxiliary class Mono-phosphine Ligands, name is Tris(2,4-di-tert-butylphenyl) phosphite, and the molecular formula is C10H9IO4, Safety of Tris(2,4-di-tert-butylphenyl) phosphite.

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

Li, Hui published the artcileEffect of a novel bio-based β-nucleating agent on the properties of isotactic polypropylene, SDS of cas: 31570-04-4, the publication is Journal of Polymer Research (2021), 28(12), 473, database is CAplus.

This study reported a series of esterified lignin metal salts (EL-M, M = Na, Mg, Ca, Ba, Zn) derived from lignin as nucleating agents, which were used in isotactic polypropylene (iPP). The crystallization and melting behavior and mech. properties of iPP/EL-M composites were studied. The results of differential scanning calorimetry (DSC) and wide-angle X-ray diffraction (WAXD) revealed that the crystallization temperature of iPP/EL-M composites increased by 5 to 8°C compared with that of pure iPP. Simultaneously, EL-Zn, EL-Ba and EL-Ca all had strong β-crystal induction ability to iPP. Especially, when the addition amount of EL-Zn in iPP was 0.20 weight%, the relative β-content of iPP/EL-Zn reached up to 0.9277, and it was basically not affected by the cooling rate, indicating that EL-Zn was extremely active, selective and stable for iPP. For the vantage, the results of mech. properties and SEM revealed that EL-Zn, EL-Ba or EL-Ca could improve the toughness of iPP to a certain extent.

Journal of Polymer Research published new progress about 31570-04-4. 31570-04-4 belongs to esters-buliding-blocks, auxiliary class Mono-phosphine Ligands, name is Tris(2,4-di-tert-butylphenyl) phosphite, and the molecular formula is C42H63O3P, SDS of cas: 31570-04-4.

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

Qin, Wei published the artcileFailure mechanism of zinc adipate as a β-nucleating agent for polypropylene in the presence of calcium stearate, Safety of Tris(2,4-di-tert-butylphenyl) phosphite, the publication is Polymer (2021), 123374, database is CAplus.

Although zinc dicarboxylic acids are highly effective β-nucleating agents (β-NAs), they lose their β-nucleating ability in isotactic polypropylene (iPP) upon the addition of calcium stearate (CaStr₂). In this study, we investigated the failure mechanism of these β-NAs in terms of the chem. and phys. interactions of zinc adipate (ZnAA) with CaStr₂. No chem. reaction occurs between CaStr₂ and ZnAA; rather, it is the phys. interactions between this β-NA and CaStr₂ that are responsible for the loss of β-nucleating ability. Based on the exptl. findings and mol. dynamics (MD) simulations, we suggest a blocking effect of CaStr₂ on nucleation as a possible failure mechanism. MD simulations confirmed that the aggregation of CaStr₂ on the β-NA surface, observed exptl. using polarized optical microscopy and SEM, resulted from the binding energy for the interaction between ZnAA and CaStr₂ being higher than that for iPP/CaStr₂. Because the active nucleation sites on the surface of the β-NA were covered, lattice matching between ZnAA and the iPP chains was hindered. Therefore, the addition of CaStr₂ weakens the β-nucleating ability of ZnAA, leading to inhibition of the epitaxial crystallization process, thereby decreasing the degree of β-crystal formation and, consequently, lowering the toughness of the resulting iPP.

Polymer published new progress about 31570-04-4. 31570-04-4 belongs to esters-buliding-blocks, auxiliary class Mono-phosphine Ligands, name is Tris(2,4-di-tert-butylphenyl) phosphite, and the molecular formula is C42H63O3P, Safety of Tris(2,4-di-tert-butylphenyl) phosphite.

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

Gong, Xinying published the artcileOrganophosphite antioxidants in mulch films are important sources of organophosphate pollutants in farmlands, Synthetic Route of 31570-04-4, the publication is Environmental Science & Technology (2021), 55(11), 7398-7406, database is CAplus and MEDLINE.

Organophosphite antioxidants (OPAs) are important auxiliary antioxidants used in plastic polymers and can be oxidized to organophosphate esters (OPEs) during production and processing. In this work, the occurrence of OPAs and OPEs in farmlands with or without mulch film applications was investigated. Six OPAs and five OPEs were detected, with the median concentrations of 2.66 ng/g (∑₆OPAs) and 100 ng/g (∑₅OPEs) in the film-mulching soil and 1.16 ng/g (∑₆OPAs) and 47.9 ng/g (∑₅OPEs) in the nonfilm-mulching soil, resp. The oxidative derivative of AO168 (tris (2,4-di-tert-butylphenyl) phosphite), a typical OPA, AO168=O (tris (2,4-di-tert-butylphenyl) phosphate) was frequently detected in farmlands at the concentrations of 0-731 ng/g, which is much higher than that of the com. OPEs (0-12.1 ng/g). This suggests that the oxidation derivatives of OPAs (OPAs=O) might be important OPE contaminants in soils. Mulch films could be their important source. According to the simulation migration experiment, the emission risk ranges of AO168 and AO168=O from mulch films to soils in China were estimated to be 3.96-87.6 and 10.5-95.3 tons/yr, resp., which were much higher than those of OPEs from sewage sludge applications. Simulation experiments also demonstrated that oxidation was the major pathway for OPAs in soils. OPAs with small substituent groups could be potential sources for organophosphate diesters. For the first time, the serious pollution of OPAs and OPAs=O in soils has been reported, and mulch films have been identified as their potential source.

Environmental Science & Technology published new progress about 31570-04-4. 31570-04-4 belongs to esters-buliding-blocks, auxiliary class Mono-phosphine Ligands, name is Tris(2,4-di-tert-butylphenyl) phosphite, and the molecular formula is C42H63O3P, Synthetic Route of 31570-04-4.

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

Jiang, Tiankai published the artcileComparison of UV resistance of HDPE added with hindered amine light stabilizers with different molecular structures, Recommanded Product: Tris(2,4-di-tert-butylphenyl) phosphite, the publication is Polymers for Advanced Technologies (2021), 32(3), 1288-1300, database is CAplus.

UV resistance of versatile plastics has been received attention for a long time, especially of high-d. polyethylene (HDPE). It was studied systematically that hindered amine light stabilizer (HALS) with different mol. structures had an effect on the UV resistance of HDPE. The mol. weights of the two HALS were 423.7 and 2100-3000 g/mol, resp. It was found that the low-mol.-weight HALS outperforms the polymeric one of HDPE matrix in UV resistances due to the different mol. structures. HDPE-containing HALS with different mol. structures followed different degradation mechanisms during artificial accelerated aging. In addition, HDPE matrix composites with low-mol.-weight HALS show better mech. properties than the polymeric one because of the decrease of delay of mol. chain fracture during irradiation Therefore, HDPE matrix composites with low-mol.-weight HALS have better UV degradation resistance. However, polymeric HALS has the advantage of hard to move out of the sample surface.

Polymers for Advanced Technologies published new progress about 31570-04-4. 31570-04-4 belongs to esters-buliding-blocks, auxiliary class Mono-phosphine Ligands, name is Tris(2,4-di-tert-butylphenyl) phosphite, and the molecular formula is C42H63O3P, Recommanded Product: Tris(2,4-di-tert-butylphenyl) phosphite.

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

Dong, Jie published the artcileManganese-catalysed divergent silylation of alkenes, Category: esters-buliding-blocks, the publication is Nature Chemistry (2021), 13(2), 182-190, database is CAplus and MEDLINE.

Transition-metal-catalyzed, redox-neutral dehydrosilylation of alkenes is a long-standing challenge in organic synthesis, with current methods suffering from low selectivity and narrow scope. The authors report a general and simple method for the Mn-catalyzed dehydrosilylation and hydrosilylation of alkenes, with Mn₂(CO)₁₀ as a catalyst precursor, by using a ligand-tuned metalloradical reactivity strategy. This enables versatility and controllable selectivity with a 1:1 ratio of alkenes and silanes, and the synthetic robustness and practicality of this method are demonstrated using complex alkenes and light olefins. The selectivity of the reaction was studied using d. functional theory calculations, showing the use of an ⁱPrPNP ligand to favor dehydrosilylation, while a JackiePhos ligand favors hydrosilylation. The reaction is redox-neutral and atom-economical, exhibits a broad substrate scope and excellent functional group tolerance, and is suitable for various synthetic applications on a gram scale. [graphic not available: see fulltext].

Nature Chemistry published new progress about 31570-04-4. 31570-04-4 belongs to esters-buliding-blocks, auxiliary class Mono-phosphine Ligands, name is Tris(2,4-di-tert-butylphenyl) phosphite, and the molecular formula is C42H63O3P, Category: esters-buliding-blocks.

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

Gao, He published the artcileUltraviolet light-responsive polyacrylate film with high fatigue resistance, Computed Properties of 31570-04-4, the publication is Journal of Polymer Research (2022), 29(2), 46, database is CAplus.

Photochromic materials with stable properties during long-term use have a very broad application prospect. Herein, five kinds of spirooxazines (SO1-SO5) with antioxidant properties were successfully synthesized by blending and covalently bonding antioxidants. Then various photochromic polyacrylate laminating adhesives (PA1-PA7) with good fatigue resistance were prepared by incorporating spirooxazines into polyacrylate. Among them, this study used 2, 6 -di-tert-butyl-4-methylphenol (BHT) as the main antioxidant, and tris (2, 4-di-tert-butylphenyl) phosphite (168) as the auxiliary antioxidant. Upon UV activation, these PA films possessed superior photochromism and light responsiveness. Importantly, unlike traditional phys. blending photochromic polymers, SO₂ was successfully covalently bonded into PA through reaction (PA6), effectively improving the fatigue resistance and thermal stability of the PA film. Doping with BHT, it further improved the photochromic properties of the compound film (PA7).

Journal of Polymer Research published new progress about 31570-04-4. 31570-04-4 belongs to esters-buliding-blocks, auxiliary class Mono-phosphine Ligands, name is Tris(2,4-di-tert-butylphenyl) phosphite, and the molecular formula is C42H63O3P, Computed Properties of 31570-04-4.

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

Su, Yifan published the artcilePreparation and properties of ethylene-acrylate salt ionomer/polypropylene antistatic alloy, Product Details of C42H63O3P, the publication is Advanced Composites and Hybrid Materials (2021), 4(1), 104-113, database is CAplus.

Ethylene-acrylate salt ionomer antistatic agent was prepared with ethylene-Et acrylate copolymer and potassium hydroxide as the primary raw materials and blended with polypropylene (PP) to make self-made ionomer/PP antistatic alloy. Com. Entira and PP were blended in the same way to prepare Entira/PP antistatic alloy. Then, the morphol. and phys. properties of the self-made ionomer/PP and Entira/PP were studied using differential scanning calorimetry, thermo-gravimetric anal., rotary rheometer, and scanning electron microscope. The exptl. results showed the development of a self-made ionomer in a torque rheometer successfully, and its performance in all aspects was similar to the com. Entira. Material test results have shown that the phys. properties such as surface and volume resistivity, antistatic durability, thermal weight loss, crystallization properties, and rheol. properties of PP modified by self-made ionomer are very similar to those modified by Entira. And due to the selection of raw materials, this self-made ionic antistatic agent is cheaper than com. Entira and has good research value. A permanent antistatic agent was prepared by the saponification reaction of ethylene-Et acrylate copolymer and KOH. This antistatic agent can reduce the resistivity of PP by 8 orders of magnitude, showing an antistatic effect similar to that of com. Entira.

Advanced Composites and Hybrid Materials published new progress about 31570-04-4. 31570-04-4 belongs to esters-buliding-blocks, auxiliary class Mono-phosphine Ligands, name is Tris(2,4-di-tert-butylphenyl) phosphite, and the molecular formula is C18H26ClN3O, Product Details of C42H63O3P.

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