Studies on Synthesis of 3-(2-Cyano ethoxy)methyl- and 3-[triethylenoxy)]methyl-3'-methyloxetane and Their Copolymers

Abstract

Abstract: The two monomers 3-(2-cyano ethoxy)methyl- and 3-[-methyl-triethyloxetane were prepared from the reaction of 3-methyl-3'-hydroxylmethyl oxetane(HMO) with acrylonitrile and triethylene glycol monomethyl ether,respectively.A novel series of copolymers were synthesized by starting from these two monomers along with BF₃·ether as the catalyst and BDO as the initiator via a cationic ring-opening copolymerization.The GPC analysis presents the number average molecular weight of the copolymers ranging from 2 756 to 5 342,and polydispersity from 1.26 to 1.83.Regarding the glass transition temperature(T_g),the DSC results imply that these copolymers would have a higher ion inductivity than pure PEO.And the TGA measurements reveal that the copolymers possess a very high heat decomposition temperature.The conductivity of the AN20 at room temperature is about 1.07×10^-5 S/cm,while at 353 K is 2.79×10^-4(S/cm),approaching the practical requirement of polymer electrolytes for lithium ion batteries.

Key words: Oxetane-derived monomer, Cationic ring-opening polymerization, Copolymerization, Ion conductivity

CLC Number:

O631.1

TrendMD:

YE Lin, FENG Zeng-Guo, LI Shi-Ting, WU Feng, CHEN Shi, WANG Guo-Qing. Studies on Synthesis of 3-(2-Cyano ethoxy)methyl- and 3-[triethylenoxy)]methyl-3'-methyloxetane and Their Copolymers[J]. Chem. J. Chinese Universities, 2005, 26(10): 1946.

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Studies on Synthesis of 3-(2-Cyano ethoxy)methyl- and 3-[triethylenoxy)]methyl-3'-methyloxetane and Their Copolymers

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