期刊文献+

无机粒子对聚醚型聚氨酯微相分离的影响 被引量:6

The Effect of Inorganic Particles on Microphase Separation of Polyether Polyurethanes
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摘要 通过动态力学分析测试手段,考察了不同表面性质的无机粒子对聚四亚甲基醚二醇,2,4-甲苯二异氰酸酯,二甲硫基甲苯二胺(PTMG-TDI-E-300)组成体系的聚醚型聚氨酯(PU)微相分离的影响,并与力学性能进行关联。结果表明,在聚氨酯中加入不同的无机粒子,可以提高材料微相分离的程度,材料的耐撕裂性能明显提高。比较PU/SiO2、PU/CNTs和PU/13X分子筛的几种复合材料,以多壁碳纳米管(CNTs)对聚氨酯软硬链段的微相分离影响最大,在以tanδ-T曲线为基准时,与纯PU相比,其玻璃化转变温度下降了17.18℃。 Polyurethanes (PUs) developed from polytetramethylene glycol (PTMG), toluene 2,4-diisocyanate (TDI-100), 3, 5-dimethyl mercapto toluenediamine (E-300) and different inorganic particles were prepared by prepolymerization method. Dynamic mechanical analysis (DMA) was used to investigate the effects of inorganic particles on microphase separation and its relationship with mechanical properties. The results show that adding inorganic particles in PUs can enhance microphase separation and significantly improve tear resistance performances. Besides, among PU/SiO2, PU/CNTs and PU/zeolite molecular sieve 13X composites, carbon nanotubes(CNTs) represents the greatest effect on the microphase separation between hard and soft segments of PU. And the glass transition temperature (Tg) of soft segments (obtained from tan-T curve) in PU/CNTs composites decreases by 17.18 ℃ compared to that of pure PU.
出处 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2013年第7期101-105,共5页 Polymer Materials Science & Engineering
基金 国家自然科学基金资助项目(50273025)
关键词 聚氨酯 无机粒子 力学性能 动态力学分析 微相分离 polyurethanes inorganic particles mechanical properties dynamic mechanical analysis microphaseseparation
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参考文献8

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二级参考文献37

共引文献116

同被引文献63

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