کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
63521 48222 2016 11 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله ISI
Copolymerization of CO2 and propylene oxide using ZnGA/DMC composite catalyst for high molecular weight poly(propylene carbonate)
ترجمه فارسی عنوان
copolymerization از CO2 و پروپیلن اکسید با استفاده از کاتالیزور کامپوزیت ZnGA DMC برای پلی(کربنات پروپیلن) با وزن مولکولی بالا
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی


• Novel ZnGA is achieved with small particle size and increased surface area.
• ZnGA/DMC composite catalyst system presents synergistic effects on CO2/PO copolymerization.
• ZnGA/DMC composite catalyst shows high catalytic efficiency and selectivity to polycarbonates.
• The synthesized copolymer PPC has fairly high molecular weight (Mw = 3.9 × 105 g/mol).

The high yield and high molecular weight poly(propylene carbonate) (PPC) was synthesized via copolymerization of propylene oxide (PO) and carbon dioxide (CO2) catalyzed over zinc glutarate/double metal cyanide (ZnGA/DMC) composite catalyst. A fine crystalline ZnGA component was prepared using the crosslinked restrain effect of nonionic surfactant. Combined with a small amount of DMC, the ZnGA/DMC (molar ratio = 10:1) composite catalyst system showed an excellent synergistic effect on CO2/PO copolymerization with higher activity, selectivity, and shorter reaction time than those of the traditional ZnGA catalyst. Under the optimized reaction conditions, the molecular weight of PPC was up to 3.8 × 105 g/mol at the highest yield of 508.0 gpolym/gcat, and the selectivity was over 97.7% towards polycarbonates rather than polyether linkages. The alternating copolymer PPC exhibited good thermostability, high glass transition temperature (42.0 °C) and high decomposition temperature (5% weight loss at 253.4 °C). A synergistic mechanism of ZnGA/DMC composite catalyst was speculated.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of CO2 Utilization - Volume 16, December 2016, Pages 86–96
نویسندگان
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