China Plastics ›› 2018, Vol. 32 ›› Issue (03): 44-50.DOI: 10.19491/j.issn.1001-9278.2018.03.008

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Study on Properties of Poly(lactic acid)/Polyethylene Glycol or Polypropylene Glycol Blends

  

  • Received:2017-10-23 Revised:2017-11-15 Online:2018-03-26 Published:2018-04-26

Abstract: Blends of poly(lactic acid) (PLA) with poly(ethylene glycol) (PEG) and poly(propylene glycol) (PPG) were prepared by melt blending, and effects of PEG molecular weight on thermal and mechanical properties of the blends were investigated. Furthermore, a comparative investigation on the effects of PEG and PPG on the properties of the blends was performed at the same molecular weight but different molecular structures. The results indicated that an optimum modification effect was achieved at the PEG molecular weight of 2 000. PEG exhibited a better modifying effect on PLA than PPG at the same molecule weight.