硬脂酸镧与硬脂酸钙对ENR性能的影响  

Effect of Lanthanum Stearate and Calcium Sterate on Properties of Epoxidized Natural Rubber

作　　者：杨昌金[1] 罗勇悦[1] 许逵[1] 钟杰平[2] 汪月琼[1] 彭政[1] 

机构地区：[1]中国热带农业科学院农产品加工研究所农业部热带作物产品加工重点实验室,广东湛江524001 [2]广东海洋大学理学院,广东湛江524088

出　　处：《稀土》2017年第2期140-144,共5页Chinese Rare Earths

基　　金：海南省自然科学基金资助(514217);公益性行业(农业)科研专项经费资助(201403066);现代农业人才支撑计划(农业部);中国热带农业科学院基本科研业务费专项资金(1630122016002)

摘　　要：研究了硬脂酸镧(LaSt)与硬脂酸钙(CaSt)对ENR的硫化特性、力学性能、耐热空气老化性能及其热稳定性的影响。研究结果表明,在ENR中添加LaSt与CaSt,ENR胶料的焦烧时间T_(S1)延长,工艺正硫化时间T_(90)缩短,硫化速率指数(CRI)增加,说明LaSt与CaSt能够促进ENR的硫化;添加LaSt的ENR的拉伸性强度及拉断伸长率高于添加CaSt的胶料;LaSt对ENR的耐热空气的防护效果优于CaSt,而且添加LaSt的ENR硫化胶的热降解反应的表观活化能E高于CaSt,表明添加LaSt的ENR硫化胶的热稳定性优于添加CaSt的胶料。The effect of lanthanum stearate （LaSt） and calcium stearate （CaSt） on cure, mechanical properties, hot air aging resistance, and thermal stability of ENR25 was studied. The results showed that with the addition of LaSt and CaSt, the scorch time （TS1） and cure time （T90） of the ENR compound decreased, the cure rate index （CRI） increased. This indicates that the incorporation of LaSt and CaSt could accelerate the vulcanization of ENR. The compound with LaSt shows the better mechanical prcperties and hot air aging resistance. The ENR vuleanizates with LaSt give the higher valu of apparent activation energy of thermal degradation, indicating that thermal stability of ENR vuleanizates with LaSt is superior to that of CaSt.

关 键 词：环氧化天然橡胶 硬脂酸镧 硬脂酸钙 性能 

分 类 号：TQ332.5[化学工程—橡胶工业]