One-Pot Terpolymerization of CO2, Propylene Oxide and Lactide Using Rare-earth Ternary Catalyst

Authors

  • Lin Gu,

    1. Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin 130022, China
    2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China
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  • Yusheng Qin,

    1. Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin 130022, China
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  • Yonggang Gao,

    1. Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin 130022, China
    2. Graduate University of Chinese Academy of Sciences, Beijing 100039, China
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  • Xianhong Wang,

    Corresponding author
    1. Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin 130022, China
    • Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin 130022, China, Tel.: 0086-0431-85262250; Fax: 0086-0431-85689095
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  • Fosong Wang

    1. Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin 130022, China
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Abstract

A convenient one-pot terpolymerization of CO2, propylene oxide (PO), and L-lactide (L-LA) in short polymerization time (10 h or shorter) to afford poly(propylene carbonate-lactide) with excellent mechanical property and thermal stability using Y(CCl3COO)3-ZnEt2-glycerin rare-earth ternary catalyst is reported. The yield of the copolymerization was between 69.7 and 111.7 g/(g Zn), corresponding to L-LA/PO molar feed ratio varying from 0 to 0.1, and the number average molecular weight was between 5.5×104 and 11.9×104. The L-LA content in the terpolymer increased from 1.1% to 34.7% when L-LA/PO molar feed ratio changed from 0.01 to 0.1. Introducing L-LA as the third comonomer could significantly improve the mechanical strength and thermal stability of PPC. For the terpolymer obtained from L-LA/PO molar feed ratio of 1:50, the elongation at break reached 40.5%, which is 3 times of that of pure PPC, and the thermal decomposition temperature increased by 32°C compared with pure PPC.

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