ICCAS OpenIR
Regio-regular structure high molecular weight poly(propylene carbonate) by rare earth ternary catalyst and Lewis base cocatalyst
Tao, Youhua1,2; Wang, Xianhong1; Chen, Xuesi1; Zhao, Xiaojiang1; Wang, Fosong1
2008-07-01
Source PublicationJOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
ISSN0887-624X
Volume46Issue:13Pages:4451-4458
AbstractLewis base modification strategy on rare earth ternary catalyst was disclosed to enhance nucleophilic ability of active center during copolymerization of carbon dioxide and propylene oxide (PO), poly(propylene carbonate) (PPC) with H-T linkages over 83%, and number-average molecular weight (M-n) up to 100 kg/mol was synthesized at room temperature using Y(CCl3OO)(3)-ZnEt2-glycerine catalyst and 1,10-phenanthroline (PHEN) cocatalyst. Coordination of PHEN with active Zinc center enhanced the nucleophilic ability of the metal carbonate, which became more regio-specific in attacking carbon in PO, leading to PPC with improved H-T linkages. Moreover, the binding of PHEN to active Zinc center also raised the carbonate content of PPC to over 99%, whereas the PPC from common rare earth ternary catalyst was about 96%. Unlike the highly regio-regular structure PPC but with relatively low molecular weight recently reported in the literature, our high molecular weight regio-regular PPC did show significant improvement in thermal and mechanical performances. PPC with H-T linkages up to 83.2% showed glass transition temperature (T-g) of 43.3 degrees C, while T-g of PPC with H-T linkages of 69.7% was only 36.1 degrees C. When H-T connectivity was raised from 69.7 to 83.2%, the modulus of PPC showed a 78% increase. (c) 2008 Wiley Periodicals, Inc.
KeywordBiodegradable Carbon Dioxide Copolymerization Lewis Base Polycarbonates Poly(Propylene Carbonate) Regio-regular Stereo-specific Polymers
DOI10.1002/pola.22780
Indexed BySCI
Language英语
WOS IDWOS:000257153500016
PublisherJOHN WILEY & SONS INC
Citation statistics
Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/64254
Collection中国科学院化学研究所
Corresponding AuthorWang, Xianhong
Affiliation1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Tao, Youhua,Wang, Xianhong,Chen, Xuesi,et al. Regio-regular structure high molecular weight poly(propylene carbonate) by rare earth ternary catalyst and Lewis base cocatalyst[J]. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2008,46(13):4451-4458.
APA Tao, Youhua,Wang, Xianhong,Chen, Xuesi,Zhao, Xiaojiang,&Wang, Fosong.(2008).Regio-regular structure high molecular weight poly(propylene carbonate) by rare earth ternary catalyst and Lewis base cocatalyst.JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,46(13),4451-4458.
MLA Tao, Youhua,et al."Regio-regular structure high molecular weight poly(propylene carbonate) by rare earth ternary catalyst and Lewis base cocatalyst".JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY 46.13(2008):4451-4458.
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