Synthesis of degradable polyacetals via an intramolecular phosphonium bisborane Lewis pair catalyzed copolymerization of epoxides with o-phthaladehyde

Minmin Shi; Xinhui Kou; Jingjing LiJiwen HuiXiaowu Wang

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Synthesis of degradable polyacetals via an intramolecular phosphonium bisborane Lewis pair catalyzed copolymerization of epoxides with o-phthaladehyde

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An intramolecular phosphonium bisborane Lewis pair (PBB-Br) was used for the copolymerization of o-phthalaldehyde (OPA) with epoxides under mild conditions. In particular, poly(o-phthalaldehyde-alt-propylene oxide) termed as (poly(OPA-alt-PO)), having high molecular weight (M_n = 42.5 kg/mol) with ? = 1.12 was generated at 25 ℃ using PBB-Br as a highly efficient catalyst. The purity of OPA, temperature and monomer/comonomer feeding ratio effects on the copolymerization were investigated. Subsequently, the degradability and thermal stability of generated polyacetals were studied. Using alcohol as chain transfer agent, random or block polyacetal-polyethers with different structures can be obtained in one-pot synthesis. The cooperation of the two boron centers plays a pivotal role in boosting the activity of copolymerization of OPA and PO.

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来源
《Journal of Polymer Science》 |2023年第19期|2268-2375|共108页
作者
Minmin Shi; Xinhui Kou; Jingjing LiJiwen HuiXiaowu Wang;
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作者单位

College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, China;

Analyses and Testing Center, Qingdao University of Science and Technology, Qingdao, China;

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正文语种英语
中图分类有机化学;高分子化学（高聚物）;
关键词
degradable polyether; Lewis pair polymerization; organocatalysis; polyacetal; ring-opening alternating polymerization;

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Synthesis of degradable polyacetals via an intramolecular phosphonium bisborane Lewis pair catalyzed copolymerization of epoxides with o-phthaladehyde

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