相对分子质量分布对双峰聚乙烯薄膜树脂性能的影响

doi:10.19491/j.issn.1001-9278.2019.11.003

中国塑料 ›› 2019, Vol. 33 ›› Issue (11): 12-17.DOI: 10.19491/j.issn.1001-9278.2019.11.003

相对分子质量分布对双峰聚乙烯薄膜树脂性能的影响

姜妞¹,徐梓航¹,胡跃鑫¹,韩向艳¹,刘忠全²

1. 辽宁石油化工大学化学与材料科学学院 2. 北方华锦化学工业股份有限公司

收稿日期:2019-06-08 修回日期:2019-07-11 出版日期:2019-11-26 发布日期:2019-12-27
基金资助:
辽宁省教育厅科学研究一般项目;辽宁石油化工大学国家级科研项目培育基金资助;辽宁省科技厅博士启动基金

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

JIANG Niu¹,XU Zihang¹,HU Yuexin¹,HAN Xiangyan¹,LIU Zhongquan²

1.School of Chemistry and Materials ScienceLiaoning Shihua University,Fushun 113001,China;
2.North Huajin Chemical IndustryCoLtdPanjin12400China

Received:2019-06-08 Revised:2019-07-11 Online:2019-11-26 Published:2019-12-27
Contact: HU Yue-Xin E-mail:yxhu1981@163.com
Supported by:
General scientific research project of education department of liaoning province;Liaoning university of petroleum and chemical technology national research project cultivation fund;Liaoning provincial science and technology department doctor start fund

摘要/Abstract

摘要： 通过差示扫描量热仪、高温凝胶渗透色谱仪、旋转流变仪表征了2种具有不同力学性能的双峰高密度聚乙烯薄膜树脂（FHM 9455F1-A、FHM 9455F1-B）结构的差异性，FHM 9455F1-A比 FHM 9455F1-B具有更高的冲击强度和拉伸强度。结果表明，FHM 9455F1-A高相对分子质量部分的相对含量更大，片晶间能够形成更多的系带分子，改善了材料的冲击强度，而片晶厚度，特别是厚片晶部分的片晶厚度更厚，使得材料具有更高的拉伸强度。

关键词: 相对分子质量分布, 系带分子, 力学性能

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

中图分类号:

姜妞徐梓航胡跃鑫韩向艳刘忠全. 相对分子质量分布对双峰聚乙烯薄膜树脂性能的影响[J]. 中国塑料, 2019, 33(11): 12-17.

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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相对分子质量分布对双峰聚乙烯薄膜树脂性能的影响

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

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