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Takahashi, Shuichi*; Yoshida, Masaru; Asano, Masaharu; Notomi, Mitsuo*; Nakagawa,Tsutomu*
Nuclear Instruments and Methods in Physics Research B, 217(3), p.435 - 441, 2004/05
Times Cited Count：15 Percentile：68.16(Instruments & Instrumentation)Various characterization were used to study the effect of heavy ion irradiation on a poly(ethylen terephthalate)(PET) membrane. My study was followed using some dynamic and thermal measurements with the aim to undestand the chemical change in the material by heavy ion irradiation. The anyalyese included DMA, tensile measurement, DSC and micro-FT-IR. The overall structure change in the PET polymer was investigated as a function of the Xe ion fluence in the range from 3
10
to 310
ions/cm
. Based on some mechanical measurements such as the tensile analysis and dynamic test, the heavy ion irradiated PET membranes exhibited a significant change in cross-linking. I believe that the secondary electron induced by collision between the irradiated ion and the constituent atoms of the membrane material form the cross-linking. The polymer chain scission and structure degradations are expected to result at higher ion fluence. Also, a slight change in the structure such as amorphization has been shown by DSC and the micro-FT-IR test.
Takahashi, Shuichi*; Yoshida, Masaru; Asano, Masaharu; Nakagawa,Tsutomu*
Polymer Journal, 36(1), p.50 - 53, 2004/01
Times Cited Count：4 Percentile：12.7(Polymer Science)The poly(ethylen terephthalate)(PET) membrane, which has a membrane thickness of 12
m, was used in this study. PET is a polymer widely used for fibers, films and bottles. It was assumed that for PET, which is often used as a gas barrier film, it is easy to effect changes in its gas permeability by modification, such as by ion irradiation. Previously, I reported the effect of heavy ion irradiation on the gas permeation of a PET membrane. A portion of the heavy ion irradiated PET membranes exhibited the Knudsen flow during the gas permeation measurements. As a next step, therefore, I applied an etching technique utilizing NaOH solution to control the nanosized pore of the heavy ion irradiated PET membrane. PET membranes irradiated at a fluence of 310 ions/cm were etched in 6N or 1N NaOH solution at 60
C. The etching time was controlled to observe the changes in the gas permeation behavior depended on the etchig. This objective has consequently been used to control the Knudsen flow.
*; *; *; *; ; *
Journal of Polymer Science; Polymer Chemistry Edition, 16(9), p.2393 - 2402, 1978/00
no abstracts in English
