Polymeric aluminum porphyrin:Controllable synthesis of ultra-low molecular weight CO_(2)-based polyols  

作　　者：Chunwei Zhuo Han Cao Xiaoshen Wang Shunjie Liu Xianhong Wang 

机构地区：[1]Key Laboratory of Polymer Ecomaterials,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China [2]University of Science and Technology of China,Hefei 230026,China

出　　处：《Chinese Chemical Letters》2023年第8期434-438,共5页中国化学快报（英文版）

基　　金：The authors greatly appreciated the financial support from National Natural Science Foundation of China(Nos.22101277,51988102,22271275,22201280).

摘　　要：Carbon dioxide-based polyols with ultra-low molecular weight(ULMW,Mn<1000 g/mol)are emergent polyurethane precursors with economic and environmental benefits.However,the lack of effective proton-tolerant catalytic systems limits the development of this field.In this work,the polymeric aluminum porphyrin catalyst(PAPC)system was applied to the copolymerization of CO_(2)and propylene oxide,where sebacic acid,bisphenol A,poly(ethylene glycol),and water were used as chain transfer agents to achieve the controlled synthesis of CO_(2)-polyols.The molecular weight of the resulting CO_(2)-polyols could be facilely regulated in the range of 400–930 g/mol at low catalyst loadings,fully demonstrating its catalytic advantages of high activity,high product selectivity,and excellent proton tolerance of PAPC.Meanwhile,the catalytic efficiency of PAPC could reach up to 2.1–5.2 kg/g under organic CTA conditions,even reaching 1.9 kg/g using water as the CTA.The cPC content could be controlled within 1.0 wt%under the optimized conditions,indicating the excellent controllability of the PAPC system.ULMW CO_(2)-polyols combines the advantages of low viscosity(∼3000 mPa s at 25°C),low glass transition temperature(∼−73°C),and high carbonate unit content(∼40%),which is important for the development of high-performance polyurethanes.

关 键 词：CO_(2)-polyols Polymeric catalyst Aluminum porphyrin Ultra-low molecular weight Proton tolerance 

分 类 号：X701[环境科学与工程—环境工程] TQ317[化学工程—高聚物工业] TQ426