Effect of Molecular Weight Distribution on Properties of  Bimodal Polyethylene Resin for Films

doi:10.19491/j.issn.1001-9278.2019.11.003

Abstract

Abstract: In this work, the structural difference of two types of bimodal high density polyethylene resins (FHM 9455F1-A and FHM 9455F1-B) with different mechanical properties used for films was investigated by means of differential scanning calorimeter, high temperature gel permeation chromatograph and rotational rheometer. The FHM 9455F1-A resin exhibited higher impact strength and tensile strength than the FHM 9455F1-B one. The results indicated that the FHM 9455F1-A resin had a higher relative content in the higher molecular weight fraction, which resulted in the formation of more tie molecules between the lamellas. This result improved the impact strength of PE resins. In addition, the lamella thickness, especially for the thicker lamella contributed to higher tensile strength for the PE resins.

Key words: molecular weight distribution;tie molecule, mechanical property

CLC Number:

JIANG Niu, XU Zihang, HU Yuexin, HAN Xiangyan, LIU Zhongquan. Effect of Molecular Weight Distribution on Properties of Bimodal Polyethylene Resin for Films[J]. China Plastics, 2019, 33(11): 12-17.

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Effect of Molecular Weight Distribution on Properties of Bimodal Polyethylene Resin for Films

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