EPDM胶料中发泡剂H的分解特性研究

彭宗林　 王君　 张祥福　 张隐西　

摘　要：选用EPDM作橡胶介质，重点测试了发泡剂H在EPDM胶料中的分解温度、发气量及分解速度等参数。试验结果表明，有机发泡剂(AC，H和OBSH)在EPDM胶料中的分解温度低于它们在空气中的分解温度，而无机发泡剂(碳酸氢钠和碳酸氢铵)则刚好相反；不同牌号的EPDM胶料对发泡剂H的热分解影响并不显著；发泡剂H的热分解主要受氧化锌和硬脂酸等配合剂的影响，分解温度降低至134℃；在较高温度下发泡剂H的起始分解时间提前且发气量增大。
关键词：EPDM；发泡剂；分解温度；发气量
分类号：TQ330.38+7　文献标识码：A
文章编号：1000-890X(2000)08-0456-04

Decomposition characteristics of blowing agent H in EPDM compound

PENG Zong-lin ,WANG Jun ,ZHANG Xiang-fu ,ZHANO Yin-xi
(Shanghai Jiaotong University, Shanghai 200240, China)

Abstract：The decomposition temperature(Td), gas evolution and decomposition rate of blowing agents, especial blowing agent H(dinitroso-pentamethylene-tetramine) in EPDM compounds were investigated. The results showed that in contrast with those of the inorganic blowing agents(sodium bicarbonate and ammonium bicarbonate), the decomposition temperatures of organic blowing agents(AC, H and OBSH) in EPDM compound were lower than those in atmosphere; different brands of EPDM didn't show remarkable effect on the thermal decomposition of blowing agent H; the decomposition temperature of blowing agent H decreased to 134℃ in the presence of zinc oxide and stearic acid;and the decomposition of blowing agent H started earlier and the gas evolution increased at elevated temperature.
Keywords： EPDM; blowing agent; decomposition temperature; gas evolution