Journal
POLYMER DEGRADATION AND STABILITY
Volume 169, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2019.108996
Keywords
Polycarbonate; Methanolysis; Succinimide-based ionic liquids; Bisphenol A; Homogeneous catalysis
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Funding
- National Natural Science Foundation of China [21805154, 51673106]
- Natural Science Foundation of Shandong Province [ZR20181313009]
- Project of Shandong Province Higher Educational Science and Technology Program [J18KA065]
- China Postdoctoral Science Foundation [2019M652343]
- Talent Fund of Shandong Collaborative Innovation Center of Eco-Chemical Engineering [XTCXQN01]
- Scientific Research Foundation of Qingdao University of Science and Technology [0100229019]
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In this paper, several succinimide-based ionic liquids (SIILs) were developed and structurally characterized. They were used as multifunctional and sustainable media for selective conversion of polycarbonate (PC) into bisphenol A (BPA) via methanolysis method. The catalytic behaviors of SUB to the reaction, including the effects of SIIL structures, effects of reaction parameters, catalyst reusability, and interaction between SIIL and CH3OH were studied in detail. The [HDBU][Suc] comprising a 1,8-diazabicyclo[5.4.0]undec-7-ene cation and a succinimide anion exhibited superior performance compared to previous catalysts, and it afforded a complete depolymerization of PC with 96% BPA yield under mild conditions of 70 degrees C for 2 h in the absence of organic solvents and metal ions. The [HDBU][Suc] was easy to recycle and showed satisfactory reusability. Finally, a plausible mechanism for [HDBU][Suc]-catalyzed methanolysis of PC was presented in depth. (C) 2019 Elsevier Ltd. All rights reserved.
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