化工进展 ›› 2017, Vol. 36 ›› Issue (04): 1358-1365.DOI: 10.16085/j.issn.1000-6613.2017.04.027

• 材料科学与技术 • 上一篇    下一篇

基于AHP-DEA的聚乙烯热氧老化影响因素灰色关联分析

代军1, 晏华1, 王雪梅1, 郭骏骏2, 胡志德1, 杨健健1   

  1. 1 中国人民解放军后勤工程学院化学与材料工程系, 重庆 401331;
    2 73801部队, 江苏 无锡 214000
  • 收稿日期:2016-10-10 修回日期:2016-11-10 出版日期:2017-04-05 发布日期:2017-04-05
  • 通讯作者: 晏华,教授,博士生导师,主要从事功能高分子材料和智能材料研究。E-mail:yanhuacq@sina.com。
  • 作者简介:代军(1992-),男,硕士研究生,从事高分子材料环境失效及老化研究。E-mail:daijunhg@126.com。
  • 基金资助:
    重庆市研究生科研创新项目(CYS16239)。

Grey correlation analysis of influencing factors of polyethylene thermo-oxidation aging based on AHP-DEA

DAI Jun1, YAN Hua1, WANG Xuemei1, GUO Junjun2, HU Zhide1, YANG Jianjian1   

  1. 1 Department of Chemistry & Material Engineering, Logistical Engineering University, Chongqing 401331, China;
    2 Unit 73801, Wuxi 214000, Jiangsu, China
  • Received:2016-10-10 Revised:2016-11-10 Online:2017-04-05 Published:2017-04-05

摘要: 选取具有代表性的八类聚乙烯树脂,进行了64天的热氧老化试验,分析了密度、结晶度、分子量对聚乙烯热氧老化弯曲性能的影响,采用基于层次分析-数据包络法(AHP-DEA)的灰色关联分析法,以灰色关联为中心模型,以AHP-DEA为辅助模型,计算热氧老化时间、老化温度、密度、结晶度、分子量分布对聚乙烯弯曲性能的关联系数,从而定量得出不同因素对聚乙烯热氧老化特性的影响。研究结果表明:在95℃热氧老化条件下,密度越低、结晶度越高、分子量分布越宽的聚乙烯弯曲强度下降越快,且主要集中于老化初期与老化后期。不同因素与聚乙烯老化弯曲性能关联度大小顺序是:结晶度 > 分子量分布指数 > 密度 > 老化温度 > 老化时间,其中结晶度对聚乙烯老化性能的影响最大,关联度达到了2.857。结晶度越高,聚乙烯缺陷也就越多,在热氧环境中越容易发生氧化,老化现象更严重。

关键词: 聚乙烯, 氧化, 层次分析法(AHP), 数据包络法(DEA), 灰色关联分析, 结晶度

Abstract: In this work,eight representative types of polyethylene(PE) samples were selected and exposed in accelerated thermo-oxidation environment for up to 64 days. Taking analytic hierarchy procedure(AHP) based grey relational analysis method as the central model and data envelopment analysis(DEA) as the auxiliary model,we quantitatively studied the influence of different factors on PE thermo-oxidation properties by calculating the correlation coefficient between different factors(thermo-oxidation aging time,temperature,density,crystallinity,molecular weight) and PE bending strength. The results showed that lower of density,higher degree of crystallinity and wider molecular weight distribution of PE results in faster decrease of the bending strength which was mainly concentrated in the early and latter part of aging. The order of relational degree between different factors and PE bending strength was crystallinity,molecular weight distribution(MWD),density,aging temperature and aging time. In the internal factors,crystallinity had the greatest influence on PE thermo-oxidation aging property,with a correlation degree of 2.857. The higher the crystallinity,the more the flaw in PE,which facilitates the oxidation under thermo-oxidation environment and the aging phenomenon gets more severe.

Key words: polyethylene, oxidation, analytic hierarchy process(AHP), data envelopment analysis(DEA), grey relational analysis, crystallinity

中图分类号: 

京ICP备12046843号-2;京公网安备 11010102001994号
版权所有 © 《化工进展》编辑部
地址:北京市东城区青年湖南街13号 邮编:100011
电子信箱:hgjz@cip.com.cn
本系统由北京玛格泰克科技发展有限公司设计开发 技术支持:support@magtech.com.cn