인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
Abstract In the development of polymer electrolytes, the understanding of the complex interplay of factors that affect ion transport is of importance. In this study, the strongly coordinating and flexible poly (ethylene oxide) (PEO) is compared to the weakly coordinating and stiff poly (trimethylene carbonate) (PTMC) as opposing model systems. The effect of molecular weight ( M n ) and end group chemistry on the physical properties: glass transition temperature ( T g ) and viscosity ( η ) and ion transport properties: transference number ( T + ), ion coordination strength and ionic conductivities were investigated. The cation transference number ( T + ) showed the opposite dependence on M n for PEO and PTMC, decreasing at low M n for PTMC and increasing for PEO. This was shown to be highly dependent on the ion coordination strength of the system regardless of whether the end group was OH or if the chains were end‐capped. Although the coordination is mainly of the cations in the systems, the differences in T + were due to differences in anion rather than cation conductivity, with a similar Li + conductivity across the polymer series when accounting for the differences in segmental mobility.
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