液体丁腈橡胶的化学改性及应用  

THE CHEMICAL MODIFIED LIQUID NITRILE RUBBER AND ITS APPLICATIONS

作　　者：岳冬梅[1] 沈曾民[1] 徐瑞清[1] 魏永康[1] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029

出　　处：《高分子材料科学与工程》2004年第3期187-189,193,共4页Polymer Materials Science & Engineering

摘　　要：用新型Rh-Ru双金属加氢催化剂研究液体丁腈橡胶(LNBR)加氢成液体氢化丁腈橡胶(LHNBR)的工艺。主要讨论LNBR胶液浓度、催化剂浓度、三苯膦用量、温度、压力和反应时间等因素对液体丁腈橡胶加氢的影响。得到较佳加氢工艺参数:NBR的质量分数为30%、催化剂质量分数为0.35%、三苯膦用量为催化剂用量的6～8倍、加氢温度140℃、压力1.4MPa、反应时间6h,加氢度可达87%以上。获得的LHNBR用做氢化丁腈(HNBR)的增塑剂,可使HNBR具有好的耐油性和更高的耐热性能。因而LHNBR是一种新型、特种的耐热、耐油增塑剂。A study involving the hydrogenation of liquid acrylonitrile-butadiene copolymer(LNBR)was carried out in the presence of a bimetallic complex catalyst developed in this laboratory. The hydrogenation conditions were examined by varying the reaction parameters. The optimum reaction condition with a 30% LNBR xylene solution is at mass fraction (0.35%) catalyst under (1.4) MPa hydrogen pressure at 418 K for 6 h to obtain a product of more than 87% hydrogenation. The hydrogenated product (LHNBR) was studied as a plasticizer for HNBR. The compound has lower viscosity and hence better processability. The vulcanizate has higher tensile strength, elogation and better heat resistance. This LHNBR is an excellent heat resistance and oil resistance plasticizer for HNBR.

关 键 词：丁腈橡胶 化学改性技术 浓度 催化剂 三苯膦 压力 反应时间 

分 类 号：TQ333.7[化学工程—橡胶工业]