摘要
以正丁基锂为引发剂、环己烷为溶剂、四氢呋喃为调节剂,在模试装置上合成了丙烯腈-丁二烯-苯乙烯(ABS)树脂改性用橡胶——丁苯嵌段共聚物,研究了反应温度与产品支化结构含量、相对分子质量与产品门尼黏度、凝胶质量分数、微观结构含量的关系。结果表明,随着聚合反应最高温度的升高,共聚物支化结构含量增大;当引发温度为55℃、反应最高温度为110～120℃时,产品支化结构含量约为5%,分子量分布约为1.12,其凝胶质量分数、微观结构含量与目标产品一致,丁苯嵌段共聚物的各项性能实测值符合ABS树脂改性用胶要求。
The styrene butadiene block copolymer used for modification of acrylonitrile-butadiene-sty- rene （ABS） resin was synthesized in model test unit using n-BuLi as initiator, cyclohexane as solvent, tetrahydrofuran as polar regulator. The relationships of reaction temperature with branched structure con- tent, relative molecular mass with Mooney viscosity, mass fraction of gel and microstructure of the copoly- mers were studied. The results showed that the branched structure content of the copolymer increased with the increase of maximum reaction temperature. The branched structure content and the molecular weight distribution of the copolymer were about 5% and 1.12 respectively; mass fraction of gel and mi- crostructure content were the same as those of the tar- get product, the properties measured values of styrene butadiene block copolymer synthesized could meet the need of ABS resin modification when the initiating temperature was at 55 ℃ and the maximum reaction temperature was controlled at 110- 120 ℃.
出处
《合成橡胶工业》
CAS
CSCD
2010年第5期335-338,共4页
China Synthetic Rubber Industry
基金
中国石油化工股份有限公司资助项目(408078)
关键词
丁苯嵌段共聚物
丙烯腈-丁二烯-苯乙烯树脂
改性
支化结构
微观结构
styrene butadiene block copolymer
acrylonitrile-butadiene-styrene resin
modification
branched structure
microstructure
