Sequence‐controlled cationic ring‐opening copolymerization of spiroorthocarbonate and oxetane
Sequence‐controlled cationic ring‐opening copolymerization of spiroorthocarbonate and oxetane
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DOI：
10.1002/pola.21380
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发表时间：
2006-05
期刊：
影响因子：
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通讯作者：
Daisuke Nagai;Masaki Nishida;Bungo Ochiai;K. Miyazaki;T. Endo
中科院分区：
文献类型：
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作者：
Daisuke Nagai;Masaki Nishida;Bungo Ochiai;K. Miyazaki;T. Endo
以1，5，7，11-四氧杂螺[5.5]十一烷(SOC1)与环氧丙烷(OX)为原料，采用一步法和二步法合成了拟嵌段和三嵌段共聚物。当SOC1和OX在CH2Cl2中以三氟化硼乙醚(BF3OEt2)为引发剂在25℃进行阳离子共聚时，OX的消耗速度快于SOCl.由共聚初期产生的富含OX的梯度共聚物聚合得到相应的拟嵌段共聚物Poly[(OX-GRAD-SOC1)-b-SOC1]。我们还成功地在SOC1完全消耗前的聚合过程中加入OX合成了拟三嵌段共聚物，得到了相应的拟三嵌段共聚物聚[SOC1-b-(OX-GRAD-SOC1)-b-SOC1]。©2006威利期刊公司J Polym Sci Part A：Polym Chem 44：3233-3241,2006
Pseudo block and triblock copolymers were synthesized by the cationic ring-opening copolymerization of 1,5,7,11-tetraoxaspiro[5.5]undecane (SOC1) with trimethylene oxide (OX) via one-shot and two-shot procedures, respectively. When SOC1 and OX were copolymerized cationically with boron trifluoride etherate (BF3OEt2) as an initiator in CH2Cl2 at 25 °C, OX was consumed faster than SOC1. SOC1 was polymerized from the OX-rich gradient copolymer produced in the initial stage of the copolymerization to afford the corresponding pseudo block copolymer, poly [(OX-grad-SOC1)-b-SOC1]. We also succeeded in the synthesis of a pseudo triblock copolymer by the addition of OX during the course of the polymerization of SOC1 before its complete consumption, which provided the corresponding pseudo triblock copolymer, poly[SOC1-b-(OX-grad-SOC1)-b-SOC1]. © 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 44: 3233–3241, 2006