Synthesis and protonic conductivity of the oligomeric amides with different average molecular weights
New oligomeric amides were synthesized by the reaction of m-xylylenediamine and dimethyl oxalate to investigate the average molecular weight dependence of the protonic condcutivity. The average molecular weight was determined by the analysis of the Matrix Assisted Laser Desorption/Ionization Time of Flight (MALDI-TOF) mass spectra. The average molecular weight was decreased with increasing the quantity of water in the reaction condition. Some end groups of the oligomers were hydrolysed from the methoxycarbonyl groups to the calboxylic acid groups. The oligomers with the different average molecular weight exhibited different relative humidity (RH) dependence of the protonic conductivity. The protonic conductivity depends on the average molecular weight at the RH of 95%. The difference between the maximum and minimum protonic condcutivity is about three orders of the magnitude. The activation energy for the protonic conduction in one of the oligomers is 0.66 eV.
Oligomers Average molecular weight Proton conduction
Yuki Nagao Aya Haneda Nobuhiro Naito Fumitada Iguchi Noriko Sata Hiroo Yugami
Center for Research Strategy and Support, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-857 Technical Division, School of Engineering, Tohoku University, 6-6-04 Aramaki Aza Aoba, Aoba-ku, Send Department of Mechanical Systems and Design, Graduate School of Engineering, Tohoku University, 6-6-
国际会议
The 16th International Conference on Solid State Ionics(第十六届国际固态离子学会议)
上海
英文
1142-1145
2007-07-01（万方平台首次上网日期，不代表论文的发表时间）