文献类型：期刊文献

英文题名：Non-isothermal crosslinking of ethylene vinyl acetate initiated by crosslinking agents: kinetic modelling

作者：Zeng, Fanwei[1];Guo, Xing[1];Sun, Li[1];He, Xuelian[1];Zeng, Zuoxiang[1];Liu, Zhen[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：12

期号：24

起止页码：15623

外文期刊名：RSC ADVANCES

收录：;EI(收录号：20222412218341);WOS:【SCI-EXPANDED(收录号:WOS:000799080100001)】；

基金：We thank the National Natural Science Foundation of China (22108072; 22171084). The authors thank the.nancial support by Shanghai Pujiang Program (18PJ1402500), and the Open Project of State Key Laboratory of Chemical Engineering (SKLChE-18C01) at the East China University of Science and Technology.

语种：英文

外文关键词：Activation energy - Capillary flow - Differential scanning calorimetry - Ethylene - Isotherms - Molybdenum - Thermoplastic elastomers

摘要：The non-isothermal crosslinking process of ethylene vinyl acetate (EVA) initiated by several crosslinking agents was studied by using differential scanning calorimetry (DSC). The crosslinking agent tert-butylperoxy 2-ethylhexyl carbonate (TBEC) exhibited much shorter reaction time and lower reaction temperature. The effect of the crosslinking agent TBEC on the EVA crosslinking process was further analyzed by using Avrami, Ozawa, Mo and Flynn-Wall-Ozawa (FWO) methods, respectively. The small fluctuations in the values of Avrami exponent n and Mo parameter a indicate that the EVA crosslinking mechanism is basically unchanged with increasing heating rate and crosslinking agent content. The change of the Ozawa exponent m is presumably due to the increase in viscosity of EVA/TBEC samples during the crosslinking process. The heating/cooling function F(T) values and the activation energy E-a are dependent on the conversion rate alpha. In addition, E-a shows irregular changes in the early stages of crosslinking, and increases with the increase of conversion rate alpha in the later stages of crosslinking.