Polymerization of 1,3-butadiene catalyzed by a thermal robust, high selective and active iron catalyst: An applicable recipe for producing syndiotactic 1,2-polybutadiene
Polymerization of 1,3-butadiene catalyzed by a thermal robust, high selective and active iron catalyst: An applicable recipe for producing syndiotactic 1,2-polybutadiene
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DOI：
10.1016/j.polymer.2016.06.026
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发表时间：
2016-08-19
期刊：
影响因子：
4.6
通讯作者：
Zhang, Xuequan
中科院分区：
文献类型：
--
作者：
Gong, Dirong;Pan, Weijing;Zhang, Xuequan
合成了一类新型的有机磷酸盐，并将其应用于铁催化剂中，作为1，3-丁二烯与烷基铝（Ali-Bu 3或AlEt 3）组合的1，2-间规聚合的添加剂，在工业上有利的50-100 ℃下，在己烷中进行。在50-100 ℃下，在所有测试情况下，都实现了显着提高的聚合物产率（高达486 kg（聚合物）/mol（Fe）h）和优异的1，2-间同立构规整性。在各种聚合条件下获得的所有聚合物均具有在间同立构排列中高达94.7%的1，2-插入均序列（高达94.4%，由rrrr表示），熔点范围为170至182 ℃。目前原位生成的催化剂系统具有高生产率、选择性、鲁棒性（例如高热稳定性、对毒物的良好耐受性和作为溶液聚合介质的环境友好的己烷）和单位点行为。这些都扩展了这些多功能磷酸盐辅助催化剂的实际用途，并且它们是有希望的候选者，用作工业上可应用的1，3-丁二烯的1，2-间同立构聚合的辅助添加剂。(C)2016爱思唯尔有限公司版权所有
A novel class of organic phosphates were synthesized and applied in iron catalyst as additive for 1,2-syndiotactic polymerization of 1,3-butadiene in combination with aluminum alkyls (Ali-Bu3 or AlEt3) in hexane at industrial favorable 50-100 degrees C. Remarkable enhanced polymer productivity (up to 486 kg (polymer)/mol(Fe)h) and excellent 1,2-syndiotactic regularity have been achieved at 50-100 degrees C in all examing cases. All the polymers obtained under various polymerization conditions possess prevailingly 1,2 inserted homo-sequences up to 94.7% 1,2-selectivity in syndiotactic arrangements (up to 94.4%, denoted by rrrr) with melting point ranging from 170 to 182 degrees C. The current in-situ generated catalyst systems feature high productivity, selectivity, robustness (e.g. high thermal stability, good tolerance to poisons and environmentally friendly hexane as solution polymerization medium) and single-site behaviour. These all extend the practical usefulness of these versatile phosphates assisted catalyst, and they are promising candidates to act as ancillary additive for industrial applicable 1,2-syndiotactic polymerization of 1,3-butadiene. (C) 2016 Elsevier Ltd. All rights reserved.