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• W2898840785 abstract "ABSTRACT Due to their good mechanical properties, high molecular weight polyesters (PEs) are highly desirable for a wide range of applications especially in the packaging industry. However, the synthesis of high molecular weight polymers by energy efficient methods is difficult. In this study, a series of semi‐aromatic PEs were synthesized via the alternating ring‐opening copolymerization (ROCOP) of phthalic anhydride (PA) and cyclohexene oxide (CHO) using a salen chromium(III) complex as a catalyst and 4‐(dimethylamino)pyridine as a cocatalyst. By varying the molar ratios between CHO and PA, PEs of different molecular weights were obtained. Hexamethylene diisocyanate was used as a chain extender that further increased the molecular weights of these PEs. These chain extended aromatic polyesters (PE‐Xs) showed significant improvement in the glass transition temperature ( T g ) values. Thus, integration of ROCOP with the chain extension method can be used as an effective strategy to prepare high molecular weight PEs with improved thermal stabilities and enhanced mechanical properties. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47200." @default.
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• W2898840785 date "2018-10-30" @default.
• W2898840785 modified "2023-09-26" @default.
• W2898840785 title "Synthesis of high molecular weight aromatic polyesters via integrated alternating ring-opening copolymerization and chain extension methods" @default.
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• W2898840785 doi "https://doi.org/10.1002/app.47200" @default.
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