【摘要】 本工作采用阴离子聚合方法,以工业二乙烯基苯为偶联剂,合成了星型SB嵌段聚合物。用凝胶渗透色谱、红外、核磁共振等分析方法进行了表征。用溶液制膜法进行了力学性能测试。实验结果表明,产物是具有二相结构的多臂星型热塑性弹性体,其物理机械性能优于同类线型和3—4臂星型嵌段聚合物。更多还原

【Abstract】 The star-type styrene-butadiene block copolymers, having up to eleven arms, were synthesized by anionic polymerization with commercial divinylbenzene as the coupling agent. These block copolymers were characterized to be the thermoplastic elastomers existing textures with separated phases by IK, NMR and GPC data. It was found that the tensile strength and permanent deformation of these star-type block copolymers were superior to that of the linear, three- or four-armed star-type block copolymers with equivalent composition and segcment molecular weight.更多还原