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Impact of H + ion irradiation on Matrimid®. I. Evolution in chemical structure
Author(s) -
Hu Ling,
Xu Xinglong,
Ilconich Jeffery B.,
Ellis S.,
Coleman Maria
Publication year - 2003
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.12770
Subject(s) - irradiation , ion , benzophenone , materials science , polyimide , chemical structure , ion beam , polymer , fourier transform infrared spectroscopy , degradation (telecommunications) , polymer chemistry , dissolution , photochemistry , chemistry , chemical engineering , organic chemistry , nanotechnology , composite material , telecommunications , physics , layer (electronics) , computer science , nuclear physics , engineering
Abstract Ion beam irradiation can be used to modify the structure and gas transport properties of glassy polymers. This is the first of two studies that focus on the impact of H + ion irradiation on the structure and permeation properties of the polyimide Matrimid®. Specifically, the evolution in chemical structure after H + irradiation over a range of fluences was analyzed using FTIR spectroscopy and dissolution studies. Although H + ion irradiation at very low ion fluences induced little modification in the chemical structure, irradiation at relatively high ion fluences resulted in crosslinking of the irradiated films. The branched structure of the aliphatic methyl (CH 3 ) was the most sensitive to the H + ion irradiation. The para ‐disubstituted aromatic ring showed the strongest resistance toward ion irradiation and required fairly high doses to induce degradation. Two potential crosslinking mechanisms related to the degradation of the aliphatic methyl and the benzophenone carbonyl were presented. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 2010–2019, 2003