The Biodegradation and the Rheological Properties of Polypropylene/Hyperbranched Polyester Blends for Industrial Applications

Quality Production Improvement and System Safety Pub Date : 2023-09-01 DOI:10.21741/9781644902691-14

AL-MUTAIRI Nabeel Hasan, AL-ZUBIEDY Ali, AL-ZUHAIRI Ali, Idzikowski Adam

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Abstract

Abstract. In this research, four novel types of hyperbranched polyester polymers (HBPs) were used and blended with polypropylene polymer PP, virgin VPP and recycled rPP, using a twin-screw extrusion machine. Hyperbranched polyester was added in different weight ratios (5%, 10%, and 20%). The Fourier transform spectroscopy FTIR, the water contact angle CA, the biodegradation in soil, and the rheological properties (melt flow rate MFR) of the prepared blends were investigated. The results showed that the contact angle of VPP and rPP blends has improved with the addition of HBPs, and in addition, the biodegradation results in soil showed that weight loss increased as the amount of HBPs increased in VPP and rPP blends. The rheological properties, melt flow rate MFR, showed that the addition of HBPs increased the MFR for both PP blends, VPP and rPP. In addition, it was found that the blends' viscosity was decreased and their shear rate was increased. This is an indication that the HBPs work as a processing aid additive by increasing the shear thinning behavior.

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工业用聚丙烯/超支化聚酯共混物的生物降解及流变性能

摘要在本研究中，采用四种新型超支化聚酯聚合物(HBPs)，并在双螺杆挤出机上与聚丙烯聚合物PP、原生VPP和回收rPP共混。以不同的重量比例(5%、10%和20%)加入超支化聚酯。研究了该共混物的傅里叶变换光谱(FTIR)、水接触角(CA)、在土壤中的生物降解和流变特性(熔体流动速率MFR)。结果表明，随着HBPs的添加，VPP和rPP共混物的接触角有所改善，土壤生物降解结果表明，随着HBPs添加量的增加，VPP和rPP共混物的失重量增加。流变学性能、熔体流动速率MFR表明，HBPs的加入提高了PP共混物、VPP和rPP的MFR。此外，发现共混物的粘度降低，剪切速率提高。这表明HBPs作为一种加工辅助添加剂，通过增加剪切减薄行为发挥作用。

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Quality Production Improvement and System Safety

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