天然橡胶分子链双键中引入环氧基对其性能的影响

Effects of Epoxidation of Natural Rubber on lts Properties

天然橡胶在乳液状态下与过氧乙酸反应，在主分子链双键中引入环氧基团，可显著提高分子极性，但其高强伸性能基本保持不变；玻璃化温度上升，冲击弹性下降，耐油性、气密性、粘合性显著改善。

Natural rubber is epoxidized with peracetic acid. When epoxy group is introduced into the double bonds of the main molecular chain, the molecular polarity is enhanced,while the high elongation character remains essentially. The glass transition temperature,oil resistance,air tightness and adhesion increase significantly,but the impact elasticity decreases.Its applicability approaches to those of certain special synthetic rubbers,thus the application scope of natural rubber is broadened.