氢化羧基丁苯橡胶氢化度的测定

李晓东　刘祥耀　谢洪泉

　　摘要：用水合肼／双氧水／硫酸亚铁催化体系对羧基丁苯橡胶(XSBR)胶乳加氢，制备氢化羧基丁苯橡胶(HXSBR)。探讨了用碘量法测定XSBR不饱和度和HXSBR氢化度的条件，得到了以庚醇与四氯化碳的混合试剂［V(庚醇)∶V(四氯化碳)＝0.12∶1］为溶剂，反应时间为1.5h，温度为40～45℃的碘量法可以较好地测定HXSBR氢化度，并用溶度参数相近规则选择并解释所用溶剂。
　　关键词：氢化羧基丁苯橡胶；碘量法；氢化度；溶度参数
　　中图分类号：TQ333.1　　文献标识码：A　　文章编号：1005-3174(2000)04-0021-04

Determination of hydrogenation degree for hydrogenated
carboxylated styrene-butadiene rubber

LI Xiao-dong
(Hubei Research Institute of Chemisty,Wuhan　430074,China)
LIU Xiang-yao　XIE Hong-quan
(Department of Chemistry,Huazhong University of Science and Technology,Wuhan　430074,China)

ABSTRACT　Hydrogenated carboxylated styrene-butadiene rubber(HXSBR) was prepared by hydrogenating carboxylated styrene-butadiene rubber(XSBR)latex with hydrazine hydrate-hydrogen peroxide-ferrous sulfate system.Conditions in determining unsaturation degree of XSBR and hydrogenation degree of HXSBR via iodometry method were studied.The results showed that the hydrogenation degree of HXSBR could be accurately determined by iodometry method under conditions of using carbon tetrachloride and haptanol as mixed solvent,reaction time of 1.5h,reaction temperature at 40～45℃.The solvent chosen in the iodometry method was explained by the “like dissolves like”and solubility parameter.
Keywords:Hydrogenated carboxylated styrene-butadiene rubber;iodometry;hydrogenation degree;solubility parameter

基金项目：中国石化公司合成橡胶技术开发中心基金项目
作者简介：李晓东(1970－)，男，硕士，已发表论文多篇
李晓东（湖北省化学研究所，湖北 武汉　430074）
刘祥耀（华中理工大学化学系，湖北 武汉　430074）
谢洪泉（华中理工大学化学系，湖北 武汉　430074）

参　考　文　献：
［1］　李晓东，过俊石，谢洪泉.氢化丁苯橡胶氢化度的测定［J］.合成橡胶工业，2000，23(1)：24.
［2］　刘植榕，汤华远，郑亚丽主编.橡胶手册(第八分册)［M］.北京：化学工业出版社，1991.
［3］　何曼君，陈维孝，董西侠主编.高分子物理［M］.上海：复旦大学出版社，1992.

收稿日期：2000-09-28