基于DSC研究酚醛树脂硫化三元乙丙橡胶动力学  

Kinetics of ethylene-propylene-diene monomer rubber curing with phenolic resin based on DSC research

作　　者：吕鹏飞 LV Pengfei(National Engineering Research Center for Synthesis of Novel Rubber and Plastic Materials,Sinopec Yanshan Branch of Beijing Research Institute of Chemical Industry,Beijing 102500,China)

机构地区：[1]中国石化北京化工研究院燕山分院橡塑新型材料合成国家工程研究中心,北京102500

出　　处：《石油化工》2023年第5期679-685,共7页Petrochemical Technology

基　　金：中国石化汽车轻量化联合中心资助项目(420084)。

摘　　要：采用SnCl_(2)·2H_(2)O作为酚醛树脂硫化三元乙丙橡胶(EPDM)的催化剂,通过二维在线红外光谱、DSC等方法研究了SnCl_(2)·2H_(2)O对硫化EPDM的影响以及硫化反应动力学。实验结果表明,SnCl_(2)·2H_(2)O对酚醛树脂硫化EPDM有明显的催化作用。对于酚醛树脂-EPDM-SnCl2体系,适宜的反应条件为:酚醛树脂用量6 phr,酚醛树脂与SnCl_(2)·2H_(2)O用量比为7~8,硫化温度为200℃。随升温速率的增大,硫化反应的温度范围变窄,硫化反应时间缩短,反应焓增大。该体系的n级动力学模型为dα/dt=6.84×10^(7)e^(-70.3/RT)(1-α)^(0.9)。SnCl_(2)·2H_(2)O was used as a catalyst for curing ethylene propylene diene monomer(EPDM)rubber with phenolic resin.The effect of SnCl_(2)·2H_(2)O on EPDM curing and the curing kinetics of EPDM were studied by two-dimensional online infrared spectroscopy and DSC.The results show that SnCl_(2)·2H_(2)O has obvious catalytic effect on curing of EPDM with phenolic resin.The optimum reaction conditions for the phenolic resin-EPDM-SnCl_(2) system are as follows:phenolic resin amount 6 phr,amount ratio of phenolic resin to SnCl_(2)·2H_(2)O 7-8,and curing temperature 200℃.With the increase of the heating rate,the temperature range of curing reaction is narrowed,the curing time is shortened,and the reaction enthalpy is increased.The n-order kinetic model of the system is dα/dt=6.84×10^(7)e^(-70.3/RT)(1-α)^(0.9).

关 键 词：二维在线红外光谱 硫化特性 DSC 硫化动力学 活化能 频率因子 反应级数 

分 类 号：TQ333.4[化学工程—橡胶工业]