Jin Yulong, Chen Liang, Guo Xing, Xu Linfeng, Zhu Zhihua, Liu Zhen, Cheng Ruihua, Liu Boping
College of Materials and Energy, South China Agricultural University, Wushan Road 483, Guangzhou 510630, China.
State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, China.
Polymers (Basel). 2019 Dec 17;11(12):2121. doi: 10.3390/polym11122121.
A complexed initiating system AlCl·phenetole/TiCl·HO was prepared by simply compounding AlCl/phenetole and TiCl/HO and used for cationic polymerization of isobutylene. It was found AlCl·phenetole/TiCl·HO exhibited activities 1.2-3 times higher than those of AlCl/phenetole, and more than an order of magnitude higher than those of TiCl/HO, which indicated a notable synergistic effect produced in the complexed system. In addition, due to the higher activity of AlCl·phenetole/TiCl·HO, lower coinitiator concentration and polymerization temperature, as well as higher monomer concentration were more favored for this complexed initiating system to produce polyisobutylene (PIB) with reasonable molecular weight (M) and molecular weight distribution (MWD). Furthermore, high molecular weight polyisobutylene (HPIB) with M = 1-3 × 10 g·mol could be successfully produced by the complexed catalyst system at T = -60 to -40 °C. As a whole, the high activity as well as the simple preparation procedures of the complexed initiating system offer us a unique approach for the production of HPIB with improved efficiency.
通过简单地将AlCl/苯乙醚和TiCl/HO混合，制备了一种复合引发体系AlCl·苯乙醚/TiCl·HO，并将其用于异丁烯的阳离子聚合反应。发现AlCl·苯乙醚/TiCl·HO的活性比AlCl/苯乙醚高1.2至3倍，比TiCl/HO高一个数量级以上，这表明在复合体系中产生了显著的协同效应。此外，由于AlCl·苯乙醚/TiCl·HO的活性较高，较低的共引发剂浓度和聚合温度以及较高的单体浓度更有利于该复合引发体系制备具有合理分子量（M）和分子量分布（MWD）的聚异丁烯（PIB）。此外，在T = -60至-40°C下，复合催化剂体系可以成功制备M = 1 - 3×10 g·mol的高分子量聚异丁烯（HPIB）。总体而言，复合引发体系的高活性以及简单的制备程序为我们提供了一种以更高效率生产HPIB的独特方法。
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