微波辐射凝固天然橡胶的工艺与性能研究

摘要

The process of natural rubber (NR) coagulated by microwave radiation was observed through the transmission electron microscopy(TEM), and the conditions of microwave coagulation of NR were investigated. The physical and chemical properties, mechanic properties and dynamic mechanical properties of microwave coagulated natural rubber (m-NR)were compared with that of the acid coagulated natural rubber (a-NR)and the thermal coagulated natural rubber(t-NR). The results showed that the content of ammonia had a great influence on the process of m-NR, the mechanical properties of m-NR was better than that of a-NR and t-NR; the physical and chemical properties of m-NR achieved the standard of the 5# NR, and the Rubber Processing Analyzer (RPA) informed that the m-NR possessed the highest elastic modulus (G′)and the lowest loss factor(tanS).%采用透射电镜(TEM)对微波辐射凝固天然橡胶的凝固过程进行观察,并对微波凝固天然橡胶的凝固条件进行研究.将微波凝固天然橡胶(m-NR)与酸凝固天然橡胶(a-NR)和热凝固天然橡胶(t-NR)的理化性能、机械性能、动态力学性能进行对比研究.结果表明,氨含量对m-NR的凝固效果有很大影响；与a-NR和t-NR相比,m-NR的机械性能较好；理化性能中,m-NR各项指标都能达到5#NR的标准；通过橡胶加工分析仪(RPA)温度扫描NR的混炼胶表明,m-NR的弹性模量(G’)最大,损耗因子(tanδ)最小.