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

Chem. J. Chinese Universities

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

YING Ji-Ru^1,2, XIE Xiao-Lin^1*, 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

Abstract

Abstract: P-V-T properties of PP/POE blends were measured by PVT dilatometer under different pressure. The specific volume(V_sp), 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_c) 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 V_sp value of PP during crystallization is bigger than that of POE. With increasing the POE content, the variation of V_sp 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

CLC Number:

O631

TrendMD:

YING Ji-Ru^1,2, XIE Xiao-Lin^1*, SUN Zhao-Yan³, PENG Shao-Xian². P-V-T Properties of PP/POE Blends and Influence of Pressure on Crystallization Temperature[J]. Chem. J. Chinese Universities, doi: .

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

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