原位聚合法制备有机蒙脱土/聚碳酸酯二醇型热塑性聚氨酯弹性体复合材料  

Preparation of organic montmorillonite/polycarbonate diol type thermoplastic polyurethane elastomer composites by in-situ polymerization

作　　者：白静静[1] 王玉龙[1] 雷雁洲 李振中[1] 

机构地区：[1]太原工业学院材料工程系,太原030008

出　　处：《合成橡胶工业》2017年第3期173-178,共6页China Synthetic Rubber Industry

基　　金：山西省科技攻关资助项目(20130321020-02);山西省科技计划资助项目(国际合作计划)(2013081022);太原工业学院院级青年科学基金资助项目(2014LQ04)

摘　　要：用十六烷基三甲基溴化铵改性钠基蒙脱土(MMT),以聚碳酸酯二醇(PCDL)为软段,4,4'-二苯基甲烷二异氰酸酯/1,4-丁二醇为硬段,采用两步原位聚合法制备了插层型有机蒙脱土(OMMT)/PCDL型热塑性聚氨酯弹性体(PCU)复合材料,通过傅里叶变换红外光谱和X射线衍射法表征了OMMT和复合材料,并考察了OMMT含量对复合材料耐热性能、结晶性能及物理机械性能的影响。结果表明,OMMT层间距由MMT的1.217 nm扩大到1.856 nm,复合材料的层间距扩大至3.425 nm;复合材料的耐热性能、结晶性能和物理机械性能均优于纯PCU,当OMMT质量分数为1%时,复合材料的耐热性能最佳;当OMMT质量分数为3%时,复合材料的结晶性能和物理机械性能最佳。Na-montmorillonite（MMT） was organi- cally modified with cetyltrimethyl ammonium bro- mide, and intercalated organic montmorillonite （OMMT）/polycarbonate diol （PCDL） type thermo- plastic polyurethane elastomer （ PCU ） composites were prepared with PCDL as soft segment, 4,4＇-di- phenylmethane diisocyanate and 1,4-butane diol as hard segment by two-step in-situ polymerization. OMMT and the composites were characterized by Fourier transform infrared spectroscopy and X-ray diffraction, and the effects of OMMT amount on the heat resistance, crystallization and mechanical prop- erties of the composites were investigated. The re- sults showed that the interlayer spacing of OMMT was enlarged from 1. 217 nm of MMT to 1. 856 nm, and the interlayer spacing of the composites was fur- ther enlarged to 3. 425 nm. The heat resistance, crystallization and mechanical properties of the com- posites were better than those of pure PCU. When mass fraction of OMMT was 1% , the composites had the best heat resistance, and the composites had the best crystallinity and mechanical properties when mass fraction of OMMT increased to 3%.

关 键 词：有机蒙脱土 聚碳酸酯二醇 原位聚合 热塑性聚氨酯弹性体 复合材料 耐热性能 结晶性 能 物理机械性能 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ334[化学工程—橡胶工业]