Crystallization and Tensile Behavior of Poly(L-lactide)/ Poly(ethylene oxide) Blend

doi:10.7503/cjcu20120925

Chem. J. Chinese Universities ›› 2013, Vol. 34 ›› Issue (5): 1288.doi: 10.7503/cjcu20120925

• Polymer Chemistry • Previous Articles Next Articles

Crystallization and Tensile Behavior of Poly(L-lactide)/ Poly(ethylene oxide) Blend

XIONG Zu-Jiang¹, ZHANG Xiu-Qin², LIU Guo-Ming¹, ZHAO Ying¹, WANG Rui², WANG Du-Jin¹

1. Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China;
2. Beijing Key Laboratory of Clothing Materials R & D and Assessment, School of Materials Science & Engineering, Beijing Institute of Fashion Technology, Beijing 100029, China

Received:2012-10-11 Online:2013-05-10 Published:2013-05-10

Abstract

Abstract:

Poly(L-lactic acid)(PLLA) and PLLA/ultra high molecular weight poly(ethylene oxide)(PEO) blend were prepared by melt-mixing, respectively. The morphology and the stretching behavior as well as their dependence on stretching temperatures of PLLA and PLLA/PEO blend were studied with a combination of differential scanning calorimetry(DSC), scanning electron microscopy(SEM), and in-situ synchrotron wide-angle X-ray scattering(WAXS). The PLLA/PEO blend exhibited phase-separated morphology, with PEO particles as dispersed phase evenly distributed in PLLA matrix. The addition of PEO remarkably decreases the glass transition temperature(T_g) and increases the crystallization rate of PLLA. The fracture strain of PLLA/PEO blend increases drastically under uniaxial stretching at different temperatures of 25—60 ℃. At lower stretching temperature(60 ℃), the crystallization rate and fracture strain of PLLA/PEO blend increase. At higher stretching temperature(80 ℃), the fracture stain of the blend is lower than that of the pure PLLA, while the crystallization rate is still higher than that of PLLA.

Key words: Poly(L-lactic acid), Ultra high molecular weight poly(ethylene oxide), Stretching behavior, Crystallization

CLC Number:

O631

TrendMD:

XIONG Zu-Jiang, ZHANG Xiu-Qin, LIU Guo-Ming, ZHAO Ying, WANG Rui, WANG Du-Jin. Crystallization and Tensile Behavior of Poly(L-lactide)/ Poly(ethylene oxide) Blend[J]. Chem. J. Chinese Universities, 2013, 34(5): 1288.

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Crystallization and Tensile Behavior of Poly(L-lactide)/ Poly(ethylene oxide) Blend

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