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Asphalt modified with reactive tri-block polymers obtained by via reversible addition-fragmentation chain transfer polymerization

机译:通过通过可逆添加 - 碎裂链转移聚合通过可反应性三嵌段聚合物改性沥青

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In this work, asphalt modifiers consisting of a series of poly(glycidyl methacrylate-ran-styrene)-block-poly(butyl acrylate)-block-poly(glycidyl methacrylate-ran-styrene) tri-block copolymers (GS-BA-GS) were synthesized via reversible addition-fragmentation chain transfer polymerization. Particular attention is given to the influence of controlled copolymer structures on the physical properties, morphology, thermal stability, and rheological behavior of the asphalt blends. Results show that the degree of asphalt modification is a function of the copolymer structure in relation to the epoxide content in the chain ends of the copolymers. The rheological, thermal, and microstructure analyses reveal that the addition of reactive copolymers increases chemical interactions with the polar fraction of asphalt. Absence of gelation in addition to improvements in viscosity, elasticity, storage stability are observed in the blends with GMA concentrations of 2%-4% with respect to copolymers without functional groups. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47201.
机译:在这项工作中,由一系列聚(甲基丙烯酸甲基丙烯酸甘油酯 - 苯乙烯) - Block-poly(丙烯酸丁酯) - 伯-Poly(丙酸甲酯 - 苯乙烯 - 苯乙烯)三嵌段共聚物(GS-Ba-GS)组成的沥青改性剂组成通过可逆添加 - 破碎链转移聚合合成。特别注意受控共聚物结构对沥青共混物的物理性质,形态,热稳定性和流变行为的影响。结果表明,沥青修饰程度是共聚物结构与共聚物链末端的环氧化物含量有关的函数。流变,热和微观结构分析表明,加入反应性共聚物的加入增加了与沥青的极性级数的化学相互作用。除了粘度的改善之外,在粘度的改善,弹性,在与GMA浓度相对于没有官能团的共聚物的共聚物的共混物中观察到弹性,弹性,储存稳定性。 (c)2018 Wiley期刊,Inc.J.Phill。聚合物。 SCI。 2019,136,47201。

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