RHEOLOGIC STUDIES ON CHEMICAL CROSS-LINKING KINETICS FOR LDPE  

作　　者：杨红梅 Zhi-gang Liu Yong-zhu Yang Qiang Zheng 

机构地区：[1]Zhejiang Univ,Dept Polymer Sci&Engn,Hangzhou 310027,Zhejiang,Peoples R China [2]Minist Educ,Key Lab Macromol Synth&Functionalizat,Hangzhou 310027,Zhejiang,Peoples R China

出　　处：《Chinese Journal of Polymer Science》2012年第3期378-386,共9页高分子科学（英文版）

基　　金：financially supported by the Industrial Research Projects of the Science and Technology Plan of Ningbo, China(No.2010B10022)

摘　　要：Crosslinking reaction of LDPE resin in the presence of dicumyl peroxide （DCP） was studied by isothermal rheological measurements at different temperatures and non-isothermal differential scanning calorimetry （DSC） technique with different heating rates. The kinetic parameters of crosslinking reaction were calculated by both rheological and DSC measurements. The results reveal that with the increase of DCP contents, the apparent activation energy, Ea, ranges from about 140 kJ/mol to 170 kJ/mol and the order of crosslinking reaction, n, approaches unity. The influence of measurement frequency, on crosslinking reaction was also investigated. It can be found that n does not change with the increase of ωand Ea decreases slightly with the increase of ωCrosslinking reaction of LDPE resin in the presence of dicumyl peroxide （DCP） was studied by isothermal rheological measurements at different temperatures and non-isothermal differential scanning calorimetry （DSC） technique with different heating rates. The kinetic parameters of crosslinking reaction were calculated by both rheological and DSC measurements. The results reveal that with the increase of DCP contents, the apparent activation energy, Ea, ranges from about 140 kJ/mol to 170 kJ/mol and the order of crosslinking reaction, n, approaches unity. The influence of measurement frequency, on crosslinking reaction was also investigated. It can be found that n does not change with the increase of ωand Ea decreases slightly with the increase of ω

关 键 词：Crosslinking kinetic LDPE Rheological measurement DSC measurement. 

分 类 号：O631.21[理学—高分子化学]