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首页> 外文期刊>Polymers for advanced technologies >Effect of unmodified kraft lignin concentration on the emulsion and miniemulsion copolymerization of styrene with n-butyl acrylate and methacrylic acid to produce polymer hybrid latex
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Effect of unmodified kraft lignin concentration on the emulsion and miniemulsion copolymerization of styrene with n-butyl acrylate and methacrylic acid to produce polymer hybrid latex

机译：未修饰的牛皮蛋白浓度对丙烯酸正丁酯和甲基丙烯酸苯乙烯乳液和小乳液共聚的影响，生产聚合物杂交乳胶

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摘要

The introduction of non-modified kraft LignoBoost (R) lignin (KL) to produce polymer hybrid latex has received much attention in recent years because it is derived from renewable resources. The focus of this work is to develop a polymer hybrid latex by emulsion and miniemulsion copolymerization of styrene with n-butyl acrylate and methacrylic acid in the presence of different concentrations of KL furnished by the pulp and paper industry. The study intends to substitute a styrene in the system to understand the effect of non-modified KL on the properties not only of the latexes, but also on the copolymers themselves. Each polymerization was carried out by shot-process of tertbutyl hydroperoxide and sodium formaldehyde sulfoxylate as the redox system. The polymer latexes were characterized in relation to overall conversion, particle diameter, particle morphology, coagulum formation, surface tension, zeta potential, and atomic force microscopy. The polymers were evaluated through gel permeation chromatography, water absorption, and thermal properties. The results show that the addition of non-modified KL results in inhibition of the polymerization and that KL acts as a colloid stabilizer. Small particles were generated in the initial stages of the polymerizations. The presence of the KL altered the color of the latexes; the increase in KL concentration resulted in increase in the absorption of water of the polymer films; the increase in KL concentration resulted in decrease of the molar mass of the copolymers.
机译：近年来，未经改性的牛皮纸Lignoboost（R）木质素（KL）产生高分子杂交乳胶的影响，因为它来自可再生资源。本作作品的重点是通过乳液和丙烯酸正丁酯和甲基丙烯酸在由纸浆和造纸工业提供的不同浓度的KL存在下，通过乳液和甲基丙烯酸的乳液和甲基丙烯酸进行聚合物杂交乳液。该研究旨在将苯乙烯替代于系统中的苯乙烯，以了解非修饰的KL对胶乳上的性质的影响，而且还在共聚物本身上。通过叔丁基氢过氧化物和甲醛磺氧基化物作为氧化还原体系进行每种聚合。聚合物胶乳的特征在于与总转化，粒径，颗粒形态，凝结物形成，表面张力，ζ电位和原子力显微镜相关。通过凝胶渗透色谱，吸水和热性能来评价聚合物。结果表明，添加非修饰的K1导致抑制聚合，并且K1用作胶体稳定剂。在聚合的初始阶段产生小颗粒。 KL的存在改变了胶乳的颜色; K1浓度的增加导致了聚合物膜的水的吸收增加; K1浓度的增加导致共聚物的摩尔质量的降低。

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