热氧老化对天然橡胶硫化胶交联结构及力学性能的影响

Influence of Hot-Oxygen Aging on Crosslink Structure and Mechanical Performances of NR Vulcanite

主要研究了天然橡胶(NR)硫化胶在热氧老化过程中交联结构与力学性能的变化规律。结果表明:NR硫化胶的热氧老化不仅产生交联,同时还存在主链断裂;在老化初期以交联为主,老化后期则以主链断裂为主。

The hot-oxygen aging of NR vulcanite and the influence of hot-oxygen aging on crosslink structure and mechanical performances of NR vulcanite were studied.The experimental results showed that the hot-oxygen aging of NR vulcanite does not only produce crosslink,but also exists main chains breakdown and at the initial stage of aging,crosslink is mainly observed.At the later stage of aging,main chains breakdown is mainly observed.