Styrene/Butadiene Copolymer Synthesized by Reactive Extrusion  

作　　者：Ji-ming Wang Bo Chen Sheng-jie Tang Dong Shan 郑安呐 

机构地区：[1]Shanghai Key Laboratory of Advanced Polymeric Materials,Key Laboratory for Ultrafine Materials of Ministry of Education,School of Materials Science and Engineering,East China University of Science and Technology [2]Department of Mechanical Engineering,University of Houston

出　　处：《Chinese Journal of Polymer Science》2015年第8期1096-1103,共8页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China for the Major Program(No.50933002);the National High Technology Research and Development Program of China(863 Program,No.2012AA040306);Shanghai Leading Academic Discipline Project(No.B502)

摘　　要：In this study, we present a method to synthesize styrene-butadiene copolymer, using anionic polymerization in a co-rotating closely intermeshing twin-screw extruder. The weight content of polybutadiene in these copolymers was above 50% although in the past studies it had been possible to accomplish levels higher than 30%. ^1H-NMR and GPC show that the molecular structure of the two polymers is different due to different feeding method. In terms of the structure of the polymerized products, the mechanism of polymerization in the bulk polymerization is discussed. TEM and DMA show that two phases in the block copolymer are completely incompatible, leading to sharp phase separation, while the case is complicated in the copolymer through the mixture feeding. Traditionally, styrene-butadiene rubber is mainly synthesized by solution polymerization. Reactive extrusion in this paper provides a possibility to synthesize these products in an environmentally friendly way.In this study, we present a method to synthesize styrene-butadiene copolymer, using anionic polymerization in a co-rotating closely intermeshing twin-screw extruder. The weight content of polybutadiene in these copolymers was above 50% although in the past studies it had been possible to accomplish levels higher than 30%. ^1H-NMR and GPC show that the molecular structure of the two polymers is different due to different feeding method. In terms of the structure of the polymerized products, the mechanism of polymerization in the bulk polymerization is discussed. TEM and DMA show that two phases in the block copolymer are completely incompatible, leading to sharp phase separation, while the case is complicated in the copolymer through the mixture feeding. Traditionally, styrene-butadiene rubber is mainly synthesized by solution polymerization. Reactive extrusion in this paper provides a possibility to synthesize these products in an environmentally friendly way.

关 键 词：Reactive extrusion STYRENE BUTADIENE Anionic polymerization. 

分 类 号：TQ334[化学工程—橡胶工业]