PP／POE共混物的P-V-T属性及压力对结晶温度的影响  

P-V-T Properties of PP/POE Blends and Influence of Pressure on Crystallization Temperature

作　　者：应继儒[1,2] 解孝林[1] 孙昭艳[3] 彭少贤[2] 

机构地区：[1]华中科技大学化学与化工系,武汉430074 [2]湖北工业大学化学与环境工程学院,武汉430068 [3]中国科学院长春应用化学研究所、高分子物理与化学国家重点实验室,长春130022

出　　处：《高等学校化学学报》2009年第2期422-426,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金重大项目(批准号:20490220);华中科技大学塑性成型模拟及模具技术国家重点实验室开放课题(批准号:05-10)资助.

摘　　要：采用PVT膨胀仪研究了PP/POE共混物的P-V-T属性,利用Tait方程预测其比容和热膨胀系数(α),研究了压力对结晶温度(Tc)的影响.结果表明,Tait状态方程可用来预测部分相容的、半结晶PP/POE共混物的PVT行为.PP结晶前后的比容变化比POE的大得多,随着POE含量的增加,PP/POE共混物结晶前后比容的变化均逐渐减小.PP在熔融状态下的α比固体状态的大,而POE正好相反.PP/POE共混物的α随温度和压力的变化与其组成密切相关.随着压力的增高,PP,POE及其PP/POE共混物的结晶温度均呈线性增高的趋势.P-V-T properties of PP/POE blends were measured by PVT dilatometer under different pressure. The specific volume（Vsp）, expansivity coefficient（α） of PP, POE and PP/POE blends were calculated by Tait equation, and the influence of pressure on their crystallization temperature（ T ） were discussed. The resuits show that Tait equation can be used to predict the P-V-T properties of blends with partial compatibility and semi-crystallinity. The variation of Vsp, value of PP during crystallization is bigger than that of POE. With increasing the POE content, the variation of Vsp value of PP/POE blend decreased during its crystallization. In addition, α Of PP in molten state is bigger than that in solid state, whilst α of POE at solid state is bigger than that at molten state. The variation of α of PP/POE blend under different temperature and pressure depends on the composition of the blend. With increasing the pressure, the crystallization temperature values of PP, POE and PP/POE blends increase linearly.

关 键 词：PP/POE共混物 PVT行为 Tait状态方程 高压结晶 

分 类 号：O631[理学—高分子化学]