胶液法制备高顺式端羟基聚丁二烯液体橡胶

发布时间：2018-04-29 23:09

本文选题：端羟基聚丁二烯 + 高顺式　；参考：《高分子学报》2016年03期

【摘要】：以工业顺丁胶原液为起始原料,先经氧化裂解反应制得醛基封端的聚丁二烯液体橡胶,再经还原反应制得了端羟基聚丁二烯液体橡胶.结果表明,反应过程中顺丁胶的微观结构未发生异构化,所得的端羟基聚丁二烯液体橡胶的顺式含量高(cis-1,495%);分子量通过控制氧化裂解反应物与丁二烯结构单元的化学计量比,在2200~7000间可调(~1H-NMR法);分子量分布指数维持在1.5~2.1范围;官能度(fn)在2.0左右.与阴离子聚合型丁羟胶和自由基聚合型丁羟胶相比,氧化裂解法制备的丁羟胶微观结构更规整,顺式含量更高,能够保持极低的玻璃化转变温度.此外,以工业顺丁胶原液为原料,既省去了顺丁块胶生产的水析凝聚、干燥压块等过程,又免去了胶块剪切破碎、溶胀溶解等过程,大幅度减少了能量消耗,且反应条件温和、可控、高效、经济,具有良好的工业化前景.
[Abstract]:The polybutadiene liquid rubber was prepared by oxidation cracking reaction, and then the hydroxy terminated polybutadiene liquid rubber was prepared by the reduction reaction. The results showed that the microstructure of the polybutadiene was not isomerization in the reaction process and the CIS content of the hydroxy terminated polybutadiene liquid rubber was obtained. High (cis-1495%); molecular weight can be adjusted in 2200~7000 by controlling the stoichiometric ratio of the oxidative cracking reaction and butadiene structural units; the molecular weight distribution index is maintained in the 1.5~2.1 range; the degree of functional degree (FN) is around 2. The oxidative cracking method is compared with the anionic polyhydroxybutylene and the free radical polymerized butadiene rubber. The microstructure of hydroxyl glue is more regular and CIS content is higher, and the glass transition temperature can be kept very low. In addition, the process of water segregation condensation, dry pressing and so on, and the process of removing the shear breaking and swelling dissolution of the rubber block, greatly reducing the energy consumption and the reaction conditions. It is mild, controllable, efficient and economical, and has good prospects for industrialization.

【作者单位】：化学工程联合国家重点实验室浙江大学化学工程与生物工程学院;
【基金】：浙江省自然科学基金(基金号LY16B040001) 国家重点基础研究发展计划(973计划,项目号2011CB606004)资助
【分类号】：TQ330.1

【相似文献】