Chem. J. Chinese Universities ›› 2024, Vol. 45 ›› Issue (12): 20240381.doi: 10.7503/cjcu20240381

• Polymer Chemistry • Previous Articles     Next Articles

Functionalization of PBAT and Its Compatibilizing Effect on PBAT/TPS/PLA Blends

ZHANG Guangxiang, YANG Ke, YANG Jiayi, LIU Yang, ZHENG Songqi, ZHAO Guiyan()   

  1. School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun 113001,China
  • Received:2024-08-05 Online:2024-12-10 Published:2024-10-25
  • Contact: ZHAO Guiyan E-mail:gyzhao@lnpu.edu.cn
  • Supported by:
    the Scientific Research Fund of Liaoning Provincial Education Department, China(LJKMZ20220733)

Abstract:

In this paper, poly(butylene adipate-co-terephthalate)(PBAT)/thermoplastic starch(TPS)/poly(lactic acid)(PLA) blends were prepared through melt blending. To improve the compatibility of the blend, two reactive compatibilizers, PBAT grafted with maleic anhydride(PBAT-MA) and PBAT grafted with glycidyl methacrylate(PBAT-GMA) were prepared via free radical grafting. The interaction of the two compatibilizers with TPS and PLA and their effects on the properties of PBAT/TPS/PLA blends were investigated by rheological behavior test, tensile test, scanning electron microscopy(SEM) and dynamic mechanical analysis(DMA). The DMA and SEM results confirmed that the addition of both compatibilizers significantly improved the compatibility of the blend and the dispersion of the dispersed phase within the blend. The results of the rheological behavior and mechanical properties showed that the PBAT/TPS/PLA blend with two compatibilizers had better mechanical properties than that of the blend with the PBAT-MA compatibilizer alone. When the mass ratio of PBAT/TPS/PLA was 60∶20∶20, the yield strength of the blend reached 13.2 MPa and the tensile elastic modulus reached 150.3 MPa. This work provides a new strategy for preparing low-cost and high-performance PBAT matrix composites.

Key words: Poly(butylene adipate-co-terephthalate)(PBAT), Poly(lactic acid)(PLA), Thermoplastic starch(TPS), Compatilizer, Melt blending

CLC Number: 

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