用偶联法合成极性官能化苯乙烯-丁二烯-苯乙烯嵌段共聚物

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英文篇名：Synthesis of polar groap functionalized styrene-butadiene-styrene block copolymers by coupling reaction 作者：李静静 ; 倪春霞 ; 梁志斌 ; 许晋国 ; 梁胜彪 ; 钟向宏 英文作者：LI Jing-jing;NI Chun-xia;LIANG Zhi-bin;XU Jin-guo;LIANG Sheng-biao;ZHONG Xiang-hong;Research and Development Institute of Maoming Branch SINOPEC; 关键词：苯乙烯-丁二烯-苯乙烯嵌段共聚物 ; 极性官能化 ; 环氧氯丙烷 ; 偶联反应 ; 力学性能 英文关键词：styrene-butadiene-styrene block copolymer;;polar groap functionalization;;epichlorohydrin;;coupling reaction;;mechanical property 中文刊名：HCXF 英文刊名：China Synthetic Rubber Industry 机构：中国石化茂名分公司研究院; 出版日期：2019-01-15 出版单位：合成橡胶工业 年：2019 期：v.42 语种：中文; 页：HCXF201901003 页数：4 CN：01 ISSN：62-1036/TQ 分类号：6-9

摘要

以环己烷为溶剂、正丁基锂为引发剂、环氧氯丙烷为偶联剂合成了极性官能化苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS),研究了偶联剂用量、偶联反应的温度和时间及苯乙烯-丁二烯活性双嵌段聚合物(SB)的分子量对偶联反应的影响,以及偶联效率对极性官能化SBS力学性能的影响。结果表明,偶联效率随偶联剂用量增加和偶联温度升高而先升高后降低;随着SB数均分子量的增大,偶联效率逐渐降低。当偶联剂与正丁基锂的摩尔比为0. 6、偶联温度为80～90℃时偶联效率最大,可达80%以上,且偶联反应可在5 min内完成。极性官能化SBS的力学性能要优于市售线型SBS。
        Polar group functionalized styrene-butadienestyrene block copolymers(SBS)were synthesized with cyclohexane as solvent,n-butyl lithium as initiator,epichlorohydrin as coupling agent by coupling reaction.The effects of amount of coupling agents,time and temperature of coupling reaction and molecule weight of styrene-butadiene living diblock copolymer(SB)■_(SB)on coupling reaction,and the effects of coupling efficiency on mechanical properties of polar group functionalized SBS were investigated.The results showed that with increa-sing the amount of coupling agent and the coupling temperature,the coupling efficiency increased first and then decreased;with increasing ■(SB),the coupling efficiency decreased gradually.When the mole ratio of coupling agent to n-butyl lithium was 0.6,and coupling temperature was 80-90℃,the coupling reaction was completed within 5 min,and the coupling efficiency was over 80%and reached the maximum.The mechanical properties of the polar group functionalized SBS were better than those of commercial linear SBS sold in the market.

引文

[1]邸明伟,刘杨,张彦华,等. SBS热塑弹性体的极性化改性及其应用[J].粘接,2008,29(3):41-45.
    [2]敖宁建,王琪,张爱民. SBS改性研究及应用[J].石油化工,2001,30(11):874-878.
    [3]郑仰才.官能化SBS的合成及其应用[D].大连:大连理工大学,2007.
    [4]王强.端基官能化SBS的合成及其在改性沥青中的应用[D].大连:大连理工大学,2005.
    [5] Milkovich R. Derivatization of star-block copolymers:US,4417029[P]. 1983-11-22.
    [6]廖明义,郑仰才,金美花.以西弗碱为封端剂原位合成官能化苯乙烯-丁二烯-苯乙烯嵌段共聚物[J].合成橡胶工业,2008,31(2):109-112.
    [7]李静静,倪春霞,陈仕兵,等.端环氧基苯乙烯-丁二烯-苯乙烯嵌段共聚物的制备及在改性沥青中的应用[J].合成橡胶工业,2017,40(6):415-420.
    [8]易严德.星形SBS的偶联反应[J].合成橡胶工业,2000,23(2):78-80.