China Plastics ›› 2023, Vol. 37 ›› Issue (8): 20-27.DOI: 10.19491/j.issn.1001-9278.2023.08.004

• Materials and Properties • Previous Articles     Next Articles

Effect of poly(ethylene glycol diglycidyl ether) on compatibility and properties of PLA/PBAT blends

ZHAO Mengmeng, YANG Hongjuan, SHEN Siyu, FENG Shuo, ZHANG Weimeng, HU Jing()   

  1. College of Chemistry and Materials Engineering,Beijing Technology and Business University,Beijing 100048,China
  • Received:2023-06-02 Online:2023-08-26 Published:2023-08-21

Abstract:

Poly(lactic acid) (PLA) and poly(adipic acid⁃butylene terephthalate) (PBAT) were melt blended by using a torque rheometer with poly(ethylene glycol diglycidyl ether) (PEGDGE) as a compatibilizer. The effect of PEDGDE content on the properties of PLA/PBAT blends such as cross⁃sectional microscopic morphology, thermal properties, and mechanical strength was investigated using Fourier⁃transform infrared spectroscopy, scanning electron microscopy, and differential scanning calorimetry, etc. The results indicated that compared to the blending system without a compatibilizer, the PLA/PBAT/PEDGDE blends achieved an increase in elongation at break from 14.6 % to 38.9 %. Such a result was 2.7 times higher than that of PLA/PBAT. Due to the presence of PEGDGE, the PLA/PBAT blending system showed a shift of cold crystallization peak towards a low temperature, and its crystallinity increased significantly when 5 parts of PEGDGE were added.

Key words: poly(lactic acid), poly(adipic acid?butylene glycol terephthalate), poly(ethylene glycol diglycidyl ether), compatibilizer

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