Ultra-High-Molecular-Weight Polymers Produced by the Immortal Phosphine-Based Catalyst System

被引：90

作者：

Bai, Yun ^{[1
]}

He, Jianghua ^{[1
]}

Zhang, Yuetao ^{[1
]}

机构：

[1] Jilin Univ, Coll Chem, State Key Lab Supramol Struct & Mat, Changchun 130012, Jilin, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2018年 / 57卷 / 52期

基金：

中国国家自然科学基金;

关键词：

frustrated Lewis pairs; living polymerization; organoaluminum; organophosphorus superbases; ultrahigh-molecular-weight polymers; FRUSTRATED LEWIS PAIRS; RING-OPENING POLYMERIZATION; TRANSFER RADICAL POLYMERIZATION; CONJUGATED POLAR ALKENES; HIGH MOLAR-MASS; ANIONIC-POLYMERIZATION; LIVING POLYMERIZATION; METHYL-METHACRYLATE; ACRYLIC-MONOMERS; CARBON-DIOXIDE;

D O I：

10.1002/anie.201811946

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A strong organophosphorus superbase, N-(diphenylphosphanyl)-1,3-diisopropyl-4,5-dimethyl-1,3-dihydro-2H-imidazol-2-imine (IAP3) was combined with a sterically encumbered but modestly acidic Lewis acid (LA), (4-Me-2,6-Bu-t(2)-C6H2O)(AlBu2)-Bu-i ((BHT)(AlBu2)-Bu-i), to synergistically promote the frustrated Lewis pair (FLP)-catalyzed living polymerization of methyl methacrylate (MMA), achieving ultrahigh molecular weight (UHMW) poly(methyl methacrylate) (PMMA) with M-n up to 1927 kg mol(-1) and narrow molecular weight distribution (MWD) at room temperature (RT). This FLP catalyst system exhibits exceptionally long lifetime polymerization performance even in the absence of free MMA, which could reinitiate the desired living polymerization after the resulting system was held at RT for 24 h.

引用

页码：17230 / 17234

页数：5

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