星型嵌段丁苯树脂的合成  

Synthesis of star-type block butadiene-styrene resin

作　　者：姜科[1,2] 李传清[2] 解希铭[2] 于国柱[2] 刘冬梅[2] 付志峰[1] 李素燕[3] 

机构地区：[1]北京化工大学化工资源有效利用国家重点实验室,北京市100029 [2]中国石油化工股份有限公司北京北化院燕山分院,北京市102500 [3]国家知识产权局专利局专利审查协作北京中心材料部,北京市100083

出　　处：《合成树脂及塑料》2012年第2期1-4,共4页China Synthetic Resin and Plastics

摘　　要：以苯乙烯和丁二烯为聚合单体,采用多次加料多次引发的聚合工艺合成出一种星型嵌段丁苯树脂。在体系中水含量相同的条件下,终止剂用量增加,丁苯树脂的雾度增加,兼顾试样颜色和雾度,终止剂与正丁基锂的摩尔比为(0.6～0.7)∶1.0较好;丁苯树脂中二段聚苯乙烯的数均分子量(Mn)增加,丁苯树脂透光率增加,Mn为0.95×104时,透光率大于90.0%;二段聚苯乙烯的Mn低于0.75×104或高于1.30×104时,丁苯树脂的断裂伸长率很低,Mn为0.95×104左右时,断裂伸长率大于300%,表现出优异的韧性;偶联剂用量降低,丁苯树脂的断裂伸长率呈上升趋势。A kind of star-type block butadiene--styrene resin was synthesized from butadiene and styrene monomer with a polymerization process featuring the mode of multiple feeding and multiple initiations. The haze of the resin increased as the termination agent dosage augmented when the polymerization system kept the same water content. The appropriate molar ratio of the termination agent to n-butyl lithium should be in the range of （0.6-0.7） ： 1.0 in case of taking the color and haze of the resin specimen into account simultaneously. The light transmittance of the resin increased with the rise in the number average molecular mass（Mn） of polystyrene chain formed in the secondary feeding of the styrene monomer. The light transmittance was over 90.0% when the Mn was 0.95×10^4. The elongation at break of the resin was rather low if the M, was either less than 0.75×10^4 or higher than 1.30×10^4. The elongation at break exceeded 300% when the Mn reached about 0.95×10^4, which endowed the resin with excellent toughness. The elongation at break of the resin assumed an ascending tendency as the coupling agent dosage reduced.

关 键 词：丁苯树脂 嵌段 透光率 雾度 断裂伸长率 

分 类 号：TQ322.4[化学工程—合成树脂塑料工业]