丙烯腈-丁二烯-异戊二烯三元无规共聚物的催化加氢及表征
Catalytic hydrogenation and characterization of acrylonitrile-butadiene-isoprene ternary random copolymer
郁剑林 1李战胜 1李杨 1张春庆 1王玉荣1
作者信息
- 1. 大连理工大学化工学院高分子材料系精细化工国家重点实验室,辽宁大连116024;大连理工大学化工学院高分子材料系辽宁省高分子科学与工程重点实验室,辽宁大连116024
- 折叠
摘要
以三(三苯基膦)氯化铑[ RhCl( PPh3)3]为催化剂,甲苯为溶剂,对自制的丙烯腈-丁二烯-异戊二烯三元无规共聚物(NBIR)进行催化加氢,考察了反应温度、催化剂用量对加氢反应的影响,采用核磁共振氢谱、傅里叶变换红外光谱、差示扫描量热分析和热重分析等方法对氢化物进行了分析表征.结果表明,在反应温度为145℃、反应压力为3 MPa、催化剂质量分数占原胶的0.46％、反应时间为3h的条件下,该催化剂对NBIR有最高加氢反应活性,氢化度可达到76.1％,氢化物只有1个玻璃化转变温度(-15.9℃),耐热分解性明显改善.
Abstract
The self-made acrylonitrile-butadiene-isoprene ternary random copolymer ( NBIR ) dissolved in toluene was hydrogenated with rhodium tris ( triphenylphosphine ) chloride as catalyst system, the effects of reaction temperature and dosage of catalyst on the hydrogenation reaction were investigated, and the hydrogenated NBIR was characterized by 1 H-nuclear magnetic resonance, Fourier transform infrared spectroscopy, differential scanning cal-orimetry and thermogravimetric analysis. The results showed that when the temperature was 145 ℃ , thepressure was 3 Mpa , the mass fraction of catalyst was 0. 46 % to dry rubber, and the time was 3 h, the hydrogenation activity of the catalyst to NBIR was the highest, and the hydrogenation degree could reach 76. 1 %. The hydrogenated NBIR had only one glass transition temperature, -15.9 % , and the thermal decomposition resistance was improved.
关键词
三(三苯基膦)氯化铑/丙烯腈-丁二烯-异戊二烯三元无规共聚物/催化加氢/表征Key words
rhodium tris ( triphenylphosphine ) chloride/acrylonitrile-butadiene-isoprene ternary random copolymer/catalytic hydrogenation/characterization引用本文复制引用
基金项目
国家自然科学基金(21034001)
国家自然科学基金(20874008)
出版年
2012
NETL
NSTL
维普
万方数据