本体法合成ABS树脂 Ⅲ.乙苯的应用  

Synthesis of ABS resin with bulk polymerization process Ⅲ.Application of ethylbenzene

作　　者：于志省[1,2] 王玉荣[1,2] 李杨[1,2] 王超先[3] 黄立本[4] 邓燕霞[3] 

机构地区：[1]大连理工大学化工学院高分子材料系,辽宁大连116012 [2]辽宁省高分子科学与工程重点实验室,辽宁大连116012 [3]中国石油化工股份有限公司北京燕山分公司研究院,北京102500 [4]中国石油天然气股份有限公司大庆分公司,黑龙江大庆163714

出　　处：《合成树脂及塑料》2010年第3期1-5,共5页China Synthetic Resin and Plastics

基　　金：国家自然科学基金项目(20774015);国家863计划(2007AA03Z532);中国石油天然气集团公司中青年创新基金项目(07E1034)

摘　　要：以镍系高顺式聚丁二烯橡胶为增韧剂,采用本体接枝法合成了丙烯腈-丁二烯-苯乙烯三元共聚物(ABS)。考察了稀释剂乙苯用量对ABS预聚合过程、相态变化、分子结构及抗冲击性能的影响。结果表明:随着反应的进行,共聚单体转化率增加,高顺式橡胶的顺式结构含量降低;适量乙苯有利于单体的共聚合和接枝,使界面黏合力增强,材料以韧性方式断裂;乙苯过量时,链转移反应增多,笼蔽效应增强,导致接枝率下降,材料呈半韧性断裂。Acrylonitrile-butadiene-styrene terpolymer（ABS）was synthesized via bulk grafting process with Ni-based high cis-polybutadiene rubber （HCBR） as toughener. The effect of ethylbenzene dosage on prepolymerization, phase behavior, molecular structure and impact property of ABS was studied. The results show that the conversion of comonomers increases and the content of cis-configuration in HCBR decreases as the reaction proceeds. Adding appropriate amount of ethylbenzene（EB） favors copolymerization and grafting of the monomers, thereby making the interfacial bonding force be enhanced and causing the resultant material to be prone to ductile fracture. Adding excessive dosage of EB leads to augmented chain transfer reaction, intensified cage effect and reduced grafting degree. Thus, the resultant material presents a semi-ductile fracture mode.

关 键 词：丙烯腈-丁二烯-苯乙烯三元共聚物 稀释剂 接枝共聚合 相态变化 韧性断裂 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业]