Acrylonitrile–butadiene–styrene (ABS) copolymers were synthesized in emulsions and silica-containing emulsion gels at 20, 40, and 60 °C. The room-temperature polymerization was achieved by decomposing 2,2′-azobisisobutyronitrile (AIBN) at oil–water interfaces. The decomposition rate constants of the AIBN decomposed in bulk phases and at interfaces were measured for the first time. At room temperatures, the decomposition of AIBN primarily occurred at oil–water interfaces. At 60 °C, the decomposition of AIBN occurred both in bulk phases and at interfaces. In a dark environment without inert gas protection, the polymerizations in emulsions and emulsion gels were conducted at room temperatures successfully. The presence of fumed silica particles enhanced the interfacial initiation and the subsequent polymerization. In the presence of fumed silica, the polymerizations at 40 °C can be as fast as that conducted without silica at 60 °C. The molar mass of the ABS copolymers increased with decreased polymerization temperatures. The ABS copolymers with an ultra-high molar mass and narrow molar mass distribution were synthesized. The ABS copolymers with ultra-high molecular masses exhibit improved ductility and thermal properties without compromising Young's modulus and surface hardness. Interfacial initiation is an eco-friendly technique to produce high-performance polymer materials.

中文翻译：

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界面引发室温聚合合成丙烯腈-丁二烯-苯乙烯共聚物


在 20、40 和 60 °C 的乳液和含二氧化硅乳液凝胶中合成了丙烯腈-丁二烯-苯乙烯 (ABS) 共聚物。室温聚合是通过在油水界面分解2,2'-偶氮二异丁腈（AIBN）来实现的。首次测量了 AIBN 在体相和界面处分解的分解速率常数。在室温下，AIBN 的分解主要发生在油水界面。在 60 °C 时，AIBN 的分解发生在体相和界面处。在没有惰性气体保护的黑暗环境下，乳液和乳液凝胶的聚合在室温下成功进行。气相二氧化硅颗粒的存在增强了界面引发和随后的聚合。在气相二氧化硅存在下，40°C 下的聚合速度与无二氧化硅时 60°C 下的聚合速度一样快。 ABS 共聚物的摩尔质量随着聚合温度的降低而增加。合成了具有超高摩尔质量和窄摩尔​​质量分布的ABS共聚物。具有超高分子量的 ABS 共聚物在不影响杨氏模量和表面硬度的情况下表现出改善的延展性和热性能。界面引发是一种生产高性能聚合物材料的环保技术。