TiO_2增强聚氨酯弹性体的制备和表征  

Preparation and Characterization of Polyurethane Elastomer by Using TiO_2 as Reinforcer

作　　者：倪平[1] 李静[1] 索继栓[1] 李树本[1] 

机构地区：[1]中国科学院兰州化学物理研究所

出　　处：《聚氨酯工业》2004年第2期6-9,共4页Polyurethane Industry

摘　　要：采用三步法合成了金红石型TiO2 R和锐钛矿型TiO2 A增强聚氨酯弹性体。用GPC、DSC、SEM等技术对增强聚氨酯弹性体进行了表征 ,并测试了其力学性能。结果表明 ,TiO2 R仅作为聚氨酯弹性体的硬链段成核剂 ;TiO2 A不仅作为硬链段成核剂 ,而且还参与聚氨酯的链增长反应 ,聚氨酯在TiO2 A表面缠绕使其在聚氨酯弹性体中分散不均匀 ,TiO2 A增强聚氨酯弹性体的性能低于TiO2 R。当TiO2 R在聚氨酯弹性体质量分数为 4 %～ 5 %时 ,TiO2 R增强聚氨酯弹性体性能达到最优。The rutile TiO 2 and the anatase TiO 2/polyurethane elastomer composites with high strength and high elasticity are fabricated. The rutile TiO 2 and the anatase TiO 2 reinforcing and elastictying mechanisms for polyurethane elastomer are studied. The molecular weight and molecular weight distribution of composite measured by GPC show that they different in the process of composites. The observation of the fracture surface by SEM shows that the dispersibility of rutile TiO 2 is higher than that of anatase TiO 2.The effects of rutile TiO 2 on reinforcement and flexibility are discussed. The results indicate that composites with 4%～5% rutile TiO 2 exhibit the best mechanical properties among the material tested.

关 键 词：聚氨酯弹性体 TIO2 制备方法 表征 力学性能 硬链段成核剂 链增长反应 质量分数 

分 类 号：TQ334[化学工程—橡胶工业]