Crosslinking kinetics of polyethylene detected by rheological measurements

摘要：

　　Crosslinking kinetics of high density polyethylene (HDPE) with 2,5-di(t-butyl peroxy)-2,5-dimethyl-3-hexane(DPDH) ranging from 0.1-1.0wt% was investigated by rheological measurements.Results indicate that a critical gel can be formed at the peroxide concentration of 0.2wt%, below which peroxide decomposition results predominantly long chain branching (LCB) formation.At peroxide concentration above 0.2wt%, however, crosslinking network can be expected.With the increasing of curing temperature, the crosslinking rate at the earlier stage accelerates while the equilibrium modulus at the fully cured stage is independent on temperature.Crosslinking kinetics up to the critical gel point at lower curing temperatures of 180 and 190℃ can be fitted well by Ding-Leonov”s model.

关键词： polyethylene rheology crosslinking kinetics

作者: YANHUA Niu WENBIN Liang YINLING Zhang SHIH-YAW Lai GUANGXIAN Li

作者单位: Sichuan University, Chengdu 610065;National Institute of Clean-and-low-carbon Energy, Beijing 102209 National Institute of Clean-and-low-carbon Energy, Beijing 102209 Sichuan University, Chengdu 610065

会议类型: 国内会议

会议名称: 第十二届全国流变学学术会议

会议地点: 广州

会议语种:英文

页码: 523-526

在线出版日期: 2014-12-21（万方平台首次上网日期，不代表论文的发表时间）