阻尼材料用高乙烯基溶聚丁苯橡胶的合成及性能
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摘要
以正丁基锂(n-BuLi)为引发剂,1-叔丁氧基-2-甲氧基乙烷(CMM)为极性调节剂,制备了具有一定苯乙烯(St)嵌段含量的高乙烯基溶聚丁苯橡胶。用气相色谱仪(GC)、核磁共振波谱仪(1 HNMR)、动态黏弹谱仪(DMA)等分别测定了共聚合时单体转化率、共聚物的微观结构以及产品的力学性能和阻尼因子(tanδ)。结果表明,通过改变极性调节剂的用量及反应温度,合成的溶聚丁苯橡胶(SSBR)的乙烯基质量分数可达64.3%,St嵌段的质量分数可达6.5%,tanδ可高达0.8,样品具有良好的力学性能和阻尼性能。
High-vinyl solution polymerized styrene-butadiene rubber(SSBR)with a certain content of block styrene were synthesized with n-butyl lithium(n-BuLi)as initiator,1-tertbutoxyl-2-methoxy ethane(CMM)as polar modifier.The reaction conversion of monomers,microstructures of copolymers and tanδvalue were analyzed by gas chromatograph(GC),nuclear magnetic resonance(1 H-NMR)and dynamic mechanical analysis(DMA),respectively.The results showed that content of 1,2-polybutadiene in SSBR could be 64.3% and the content of block styrene could be 6.5% by altering the modifier dosage and the reaction temperatures.The sample has good mechanical properties and damping property with 0.9 tanδvalue.
High-vinyl solution polymerized styrene-butadiene rubber(SSBR)with a certain content of block styrene were synthesized with n-butyl lithium(n-BuLi)as initiator,1-tertbutoxyl-2-methoxy ethane(CMM)as polar modifier.The reaction conversion of monomers,microstructures of copolymers and tanδvalue were analyzed by gas chromatograph(GC),nuclear magnetic resonance(1 H-NMR)and dynamic mechanical analysis(DMA),respectively.The results showed that content of 1,2-polybutadiene in SSBR could be 64.3% and the content of block styrene could be 6.5% by altering the modifier dosage and the reaction temperatures.The sample has good mechanical properties and damping property with 0.9 tanδvalue.
引文
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[6]胡小锋,魏伯荣.阻尼橡胶[J].特种橡胶制品,2002,23(5):20-24.
[7]王雪,徐林,刘慧林,等.溶液共沉淀法合成SSBR/IIR的性能研究[J].弹性体,2009,19(6):35-37.
[8]陶刚,卢珣,郭建华,等.宽温域宽频域高阻尼橡胶材料的制备与性能[J].高分子材料科学与工程,2013,29(11):114-118.
[9]徐晓川,廖明义,王妮妮,等.无规溶聚戊苯橡胶的合成及其阻尼性能[J].合成橡胶工业,2016,39(2):93-98.
[10]段亚冲,高之香,李建武,等.丁基橡胶/受阻酚AO-80/环氧树脂复合材料的制备及其阻尼性能研究[J].粘接,2017(8):37-41.
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