Studies on Influencing Factors of Polyketone Molecular Weight by Palladium Catalyzed Alternating Copolymerization with Carbon Monoxide and Ethylene

Abstract:

With Pd(AcO)2DPPP as catalytic precursor of CO/C2H4 alternating copolymerization. The main factors which affect the molecular weight of polyketone were studied. The results showed that: Temperature was the most important factor in copolymerization. The polyketone molecular weight lower faster with increasing temperature, have a decrease of 53% when system temperature rise from 70°C to 80°C, and the palladium-catalyzed progenitor easy to decomposition and become deactivation. Adding pressure was in favor of the increase of copolymerization rate and molecular weight. Water content in methanol solvent was sensitive to copolymerization rate, as far as molecular weight was concerned, it made no difference. HClO4 and other strong acids in the catalytic system will help improve the molecular weight of the polyketone.

• Periodical: Advanced Materials Research (Volumes 634-638)
• Pages: 2014-2018
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.634-638.2014
• Online since: January 2013
• Authors: Jia Yao Du, Liang Chen, Wen Wei, Lin Deng, Ling Gao, Jing Wang
• Keywords: Carbon Monoxide, Ethylene, Molecular Weight, Palladium-Catalyzed, Polyketone

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