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Synthesis of Polycarbonate Diols(PCDLs) via Two-step Process Using CH3COONa as an Effective Catalyst

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Abstract

Polycarbonate diols(PCDLs) with a number average molecular weight(Mn) of 2800 and a narrow polydispersity index(PDI=1.33) were synthesized from dimethyl carbonate(DMC) and 1,4-butanediol(BD) via a two-step process. The influences of the molar ratios of DMC to BD in the feedstock, polycondensation temperature and polycondensation time on the PCDLs preparation were studied. CH3COONa showed the best catalytic performance among the catalysts studied. The highest BD conversion of 73.8% and PCDLs yield of 64.7% were achieved under its optimum reaction conditions. Furthermore, based on the results of 1H NMR, the relationships between the ratio of end groups (—OCH3/—OH) of oligomers, the Mn and chainend constitute of resultant polycarbonates were also investigated. The results indicate that PCDLs can be synthesized when the oligomers mostly bear hydroxyl end groups. In contrast, it was impossible to prepare PCDLs when the oligomers were enriched with methyl carbonate end groups.

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Authors and Affiliations

  1. Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, 610041, P. R. China

    Menglu Song, Xiangui Yang & Gongying Wang

  2. University of Chinese Academy of Sciences, Beijing, 100049, P. R. China

    Menglu Song

Authors
  1. Menglu Song
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  2. Xiangui Yang
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  3. Gongying Wang
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Corresponding author

Correspondence to Xiangui Yang.

Additional information

Supported by the National Key Research and Development Program, China(No.2018YFB0605804), the Key Research and Innovation Program of Jiangsu Province, China(No.BE2015055), and the Science &Technology Pillar Program in Sichuan Province, China(No.2016GZ0228).

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Song, M., Yang, X. & Wang, G. Synthesis of Polycarbonate Diols(PCDLs) via Two-step Process Using CH3COONa as an Effective Catalyst. Chem. Res. Chin. Univ. 34, 578–583 (2018). https://doi.org/10.1007/s40242-018-7390-0

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  • DOI: https://doi.org/10.1007/s40242-018-7390-0

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