China Plastics ›› 2025, Vol. 39 ›› Issue (6): 31-35.DOI: 10.19491/j.issn.1001-9278.2025.06.007

• Materials and Properties • Previous Articles     Next Articles

Rheological and mechanical properties of PPC and PLA blends

ZHOU Qi1,2,3, LI Quan1(), LI Yajing1(), LIU Xinan1, GU Xinchun1, HUANG Shouying3   

  1. 1.China Sedin Ningbo Engineering Co,Ltd,Ningbo 315048,China
    2.School of Material Science and Chemical Engineering,Ningbo University of Technology,Ningbo 315211,China
    3.School of Chemical Engineering,Tianjin University,Tianjin 300354,China
  • Received:2025-01-09 Online:2025-06-26 Published:2025-06-20

Abstract:

In this study, polylactic acid (PLA) was melt⁃blended with poly(propylene carbonate) (PPC) at varying composition ratios using a twin⁃screw extruder. The thermal stability, mechanical properties, water vapor barrier performance, and rheological behavior of the PLA/PPC blends were systematically analyzed via differential scanning calorimetry, universal tensile testing, water vapor transmission rate measurements, and rotational rheometry. The results indicated that phase separation occured between PLA and PPC when the PLA/PPC ratio exceeded 20/100. Despite this, the blends exhibited enhanced processing performance, improved water vapor barrier properties, and superior tensile strength. Notably, when the PLA/PPC ratio surpassed 50/100, all evaluated properties, including rheological behavior, barrier efficiency, and mechanical performance, demonstrated significant improvement.

Key words: polypropylene carbonate, polylactic acid, rheological property, mechanical property, water vapor barrier property

CLC Number: