聚丙烯/四钛酸钾晶须复合材料研究

以PP-g-GMA为增容剂,利用熔融共混法制备了PP/PP-g-GMA/K_2Ti_4O_9晶须复合材料,借助于SEM、DSC和其他测试手段对复合材料的结构和性能进行了考查.SEM观察发现,K_2Ti_4O_9晶须含量较低时,分散较均匀,与树脂界面结合较好,含量较高时,粒子有团聚现象.力学性能测试结果表明,K_2Ti_4O_9晶须的加入提高了基体树脂的缺口冲击强度,对材料的拉伸强度影响不大.DSC测试结果表明,K_2Ti_4O_9晶须对PP的结晶有异相成核作用,出现双熔融峰和双结晶峰现象,使PP的结晶度提高,同时使PP的结晶温度大幅提高.

Study on PP/K_2Ti_4O_9 whisker composite material

PP/PP-g-GMA/K_2Ti_4O_9whiskers composite were prepared by melt blending method. The morphology and performance of the composite material were studied by use of SEM, DSC and other mechanical testing. The results in-dicated that the K_2Ti_4O_9 whiskers had good toughen effect on PP matrix when its content was lower; the tensile strength varied little with the addition of the filler, but the young's modulus of the materials increased. SEM photographs showed that the K_2Ti_4O_9 whiskers formed dispersion uniformly when its content was lower than 15%, more than that, the con-glomeration occurred. DSC tests showed that the whiskers braugh a nucleation effect out of phase to the matrix; the crys-tallinity and crystal temperature of PP was heighten