文献类型：期刊文献

中文题名：反应挤出苯乙烯/丁二烯共聚物的微观结构及力学性能

英文题名：Microstructure and Mechanical Properties of Styrene/Butadiene Copolymer Synthesized by Reactive Extrusion

作者：孙刚[1];周颖坚[1];张锴[1];胡福增[1];郑安呐[1]

机构：[1]华东理工大学材料科学与工程学院超细材料制备与应用教育部重点实验室,上海200237

年份：2007

卷号：20

期号：4

起止页码：399

中文期刊名：功能高分子学报

外文期刊名：Journal of Functional Polymers

收录：CSTPCD;;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金(50290090)

语种：中文

中文关键词：反应挤出;苯乙烯;丁二烯;力学性能

外文关键词：reactive extrusion; styrene; butadiene; mechanical property

摘要：在双螺杆挤出机中以有机锂为引发剂，以丁二烯（B）与苯乙烯（S）为混和单体，采用本体一步合成法制备了S／B共聚物。采用双氧水在四氧化锇催化下对聚合物分子链进行氧化降解，^1H-NMR和FT-IR分析表明共聚物中的双键被全部氧化并发生断裂，而共聚物中聚苯乙烯的链节并未被破坏。利用18角度小角激光光散射仪（MALLS）联用凝胶渗透色谱（GPC）对氧化降解后的聚苯乙烯碎片进行分析证明：共聚物分子是由1条1×10^4～4×10^4分子量的聚苯乙烯嵌段连接着数10个S-B嵌段的结构。TEM分析表明调节反应过程中的工艺条件可以控制共聚物的织态结构。此外对共聚物的力学性能也进行了研究。
A novel S/B copolymer is synthesized from mixed monomers of styrene and butadiene by bulk anionic polymerization in which organic lithium is used as initiator and twin screw extruder as reactor. The copolymers are oxidized with hydrogen peroxide in the presence of osmium tetroxide. It is confirmed by ^1H-NMR and FTIR that the double bonds in the molecule chains of the copolymers are fully oxidized, while the segments of polystyrene in the copolymers are kept intact. The segments of polystyrene were characterized by gel permeation chromatognaphy（GPC） connected with the multi-angle laser light scattering instrument（MALLS）. It is found that the molecule of the copolymers is made of a long segment of polystyrene with Mn of 10～50 thousands and tens of S-B blocks. It is confirmed from TEM photographs that microstructure of the copolymers could be controlled by varying the processing conditions. The mechanical properties of S/B copolymer are also studied.