遥爪型液体天然橡胶的合成与表征  

Synthesis and Characterization of Telechelic Liquid Natural Rubber

作　　者：从琴琴[1] 廖双泉[2] 杨晓红[2] 张哲[2] 谢贵水[3] 

机构地区：[1]海南大学农学院,海南海口570228 [2]海南大学材料与化工学院,海南海口570228 [3]中国热带农业科学院橡胶研究所,海南儋州571737

出　　处：《合成化学》2012年第4期458-461,478,共5页Chinese Journal of Synthetic Chemistry

基　　金：海南省自然科学基金资助项目(509005);海南大学基金资助项目(hd09xm69);中国热带农业科学院橡胶研究所基本科研业务费专项(1630022011038)

摘　　要：以天然橡胶(NR)为原料,经环氧化反应在NR分子链上引入环氧基制得环氧化天然橡胶(1);1经裂解反应合成了端羰基液体天然橡胶(2);对2进行改性得到端羟基液体天然橡胶(3),其结构经1H NMR和IR表征。探讨了反应温度、时间、氧化剂用量和环氧化程度对2的黏均分子量(M珚η)的影响。结果表明,延长反应时间、升高温度和增加氧化剂用量均可有效降低2的M珚η;1的环氧化程度对2的M珚η具有决定性作用,可通过调节环氧化程度实现2的M珚η的可控性。Carbonyl-telechelic liquid natural rubber（2） was synthesized from natural rubber（NR） by modification of introducing epoxy, then reaction with HsIO6 . 2H20. Hydroxyl-telechelic liquid natural rubber（3） was obtained by chemical modification of 2. The tructures were characterized by 1H NMR and IR. The effects of reaction temperature, amount of oxidant and degree of epoxidation viscosity-average relative molecular mass（Mη） of 2 were investigated. The results showed that MT/of 2 were decreased with the increase of reaction temperature, time and oxidize amount. The degree of epoxidation of 1 played a decisive role in the Mη of 2, and through the control of the degree of epoxidation of I realized the Mη controllable.

关 键 词：液体天然橡胶 遥爪型 合成 表征 黏均分子量 

分 类 号：O636.9[理学—高分子化学]