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Dołączył: 13 Gru 2010
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 Wysłany: Wto 12:03, 04 Sty 2011 Temat postu: Chemical Abstracts _46 |
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Chemical Abstracts
】 【OF Shao Qian, Cheng-Guo Wang, Zheng Heng, etc. Key words seed emulsion; emulsion; particle design Abstract seed emulsion polymerization with emulsion stability due to better particle size distribution is narrow and easy to control, etc., in Preparation of latex particles in a variety of functional design and has an important role in latex is latex and the preparation of high solid content latex with core-shell structure, the most common and most convenient method. This paper reviews the seed emulsion polymerization process, polymerization mechanism, including the grafting mechanism,[link widoczny dla zalogowanych], mechanism of interpenetrating polymer networks, polymer deposition mechanism, the seed surface polymerization mechanism and the mechanism of ionic bonding, and the design of the seed latex particles in emulsion polymerization the application of research progress, and discussed the various factors that affect seed emulsion polymerization. Version】 【self-crosslinking acrylate copolymer emulsion 【Title】 Progress 【】 Du Peihui of, XIAO Xin Yan, Hui-Ping Zhang, Wan Choi Ha Fluorinated Acrylic Key words ester; emulsion; copolymer; film; Characterization Abstract methyl methacrylate (MMA), butyl acrylate (BA) as the main monomer, butyl methacrylate hexafluoro (HFMA) for the fluorine-containing monomer, N a hydroxymethyl acrylamide (NMA) as a crosslinking monomer, prepared by seed emulsion polymerization fluorinated self-crosslinking acrylic copolymer emulsion. Of the HFMA, NMA, emulsifier (SDS + OP-lO),[link widoczny dla zalogowanych], initiator (KPS) dosage, reaction temperature, reaction time and stirring speed on the final polymerization conversion and emulsion stability, the results show that (MMA): (BA) = 1: l and stirring speed 210r/min conditions, HFMA, NMA, SDS + OP adding a 1O and KPS, respectively, the total amount of monomer 7,3 oA, 3 and 0.5 ( are the mass fraction), and polymerization temperature 75 ℃, reaction time 4h, monomer emulsion prepared from the total conversion rate, low cohesion emulsion polymerization stability, good film overall performance. In addition, the fluorinated latex film FT-IR and TG - DSC analysis showed that, HFMA effective participation in the copolymerization to improve the heat resistance of the coating. Version】 【quaternary ammonium synthesis and application of single azo 【Title】 Modern Chemical Industry 【】 Liu of the deep, Ma Jiang, De-Feng Zhao Key words cationic dye; antibacterial; quaternary ammonium salt; azo Abstract dual legal synthesized by diazotization of 1 new single-dual quaternary ammonium N weak acid dyes,[link widoczny dla zalogowanych], in accordance with the traditional dyeing wool dyeing, the dyeing rate of 7O, but the color fastness is low. The dye solution has a lower antimicrobial activity. And also tested in the synthesis of previous work the other three with different alkyl chain length of cationic dyes in the dyeing properties and antibacterial activity. Version】 【silicone surfactant research development and application in leather industry prospects 【Title】 El chemical science 【】 Wang Xuechuan of, Jian-Hua Ding, Yuan Xu G Key words silicone surfactants; modification; leather; applications; prospects Abstract briefed silicone surfactants and performance characteristics of the basic profile described in detail silicone surfactant research trends, especially organic silicon modified types of surfactants and related content. And discusses silicone surfactants in the leather industry applications. Version】 【acrylic emulsion preparation of composite nanoparticles and anti-aging properties of UV, 【Title】 New Building Materials - (2007.08> 【】 Zhong Mingqiang of; Zhang Jun; Xu Bin,[link widoczny dla zalogowanych], Key words in situ polymerization; benzene acrylic emulsion; nanoparticles; anti-aging properties of UV Abstract of nano particles of styrene-acrylic emulsion type and amount of ultraviolet aging properties. TEM analysis showed that the latex particles in the nano-dispersed nano-reaching effects, is aggregated material covered in good condition. nm SiO and nano-TiO. UV properties of the composite emulsion have different degrees of improvement in the two kinds of nano-emulsion particles outstanding synergy,[link widoczny dla zalogowanych], joined the 0.1SiO. +0.1 TiO.'s compound emulsion, UV transmittance than in the 225nm wavelength range lower than non Jia Nami particle samples more than 2O, at 250 --- 300nm wavelength range decreased by about 30. UV-resistant composite emulsion film is not aging more Jia Nami improved film emulsion particles, nano-particles content 0.19,6 TiO +0.1 SiO: film when the anti-pulverization and anti-color best.
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