高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

PP/POE共混物的P-V-T属性及压力对结晶温度的影响

应继儒1,2, 解孝林1, 孙昭艳3, 彭少贤2   

    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
  • 收稿日期:2008-05-05 修回日期:1900-01-01 出版日期:2009-02-10 发布日期:2009-02-10
  • 通讯作者: 解孝林

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

YING Ji-Ru1,2, XIE Xiao-Lin1*, SUN Zhao-Yan3, PENG Shao-Xian2   

    1. Department of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;
    2. School of Chemical and Environmental Engineering, Hubei University of Technology, Wuhan 430068, China;
    3. State Key Laboratory of Polymer Physics & Chemistry, Changchun Institute of Applied Chemistry Chinese Academy Sciences, Changchun 130022, China
  • Received:2008-05-05 Revised:1900-01-01 Online:2009-02-10 Published:2009-02-10
  • Contact: XIE Xiao-Lin

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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.

关键词: PP/POE共混物, PVT行为, Tait状态方程, 高压结晶

Abstract: 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(Tc) were discussed. The results 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.

Key words: PP/POE blend, PVT behavior, Tait equation, Crystallization, Pressure

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