应用化学 ›› 1998, Vol. 0 ›› Issue (5): 31-34.

• 研究论文 • 上一篇    下一篇

交联方法对交联聚乙烯结晶行为的影响

龚方红, 李锦春, 俞强, 林明德   

  1. 江苏石油化工学院材料工程系 常州213016
  • 收稿日期:1998-01-20 修回日期:1998-05-06 出版日期:1998-10-10 发布日期:1998-10-10

On the crystallization Behavior of Silane Crosslinked LDPE and Peroxide Crosslinked LDPE

Gong Fanghong, Li Jinchun, Yu Qiang, Lin Mingde   

  1. Department of Materials, Jiangsu Institute of Petrochemical Technology, Changzhou 213016
  • Received:1998-01-20 Revised:1998-05-06 Published:1998-10-10 Online:1998-10-10

摘要: 研究了硅烷交联聚乙烯和过氧化物交联聚乙烯由于结晶和交联的顺序不同而造成的结晶行为的差异,交联密度相同时,过氧化物交联聚乙烯的结晶度和熔点明显低于硅烷交联聚乙烯。交联聚乙烯的非等温结晶动力学表明:交联前后聚乙烯的Avrami指数n基本不变,交联后,半结晶期t1/2延长、结晶速率常数Zc下降,其中过氧化物交联聚乙烯的变化幅度大于硅烷交联聚乙烯。

关键词: 硅烷交联聚乙烯, 过氧化物交联聚乙烯, 交联密度, 结晶度, 非等温结晶动力学

Abstract: The crystallization behavior of silane-crosslinked LDPE and peroxide-crosslinked LDPE have been compared by using DSC and WAXD techniques. It is found that the crystallinity and melt point of the peroxide-crosslinked LDPE are lower than those of the silane crosslinked LDPE when their crosslinking densities are of the same value. DSC measurements show that after crossinking the Avrami exponents (n) have no significant change, but the rate constants of crystallization decrease and the half crystallization times increase, whereas the variation range for the peroxide crosslinked LDPE is greater than that for the silane-crosslinked LDPE.

Key words: peroxide-crosslinked LDPE, silane-crosslinked LDPE, crosslinking density, crystallinity, non-isothermal crystallization kinetics