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Radiation effects on methyl vinyl polysilicone foam
Author(s) -
Huang Wei,
Fu Yibei,
Wang Chaoyang,
Xu Yunshu,
Chen Yinliang
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.12550
Subject(s) - thermogravimetric analysis , inert gas , irradiation , materials science , fourier transform infrared spectroscopy , evolved gas analysis , pyrolysis , gas chromatography , mass fraction , spectroscopy , scanning electron microscope , infrared spectroscopy , nuclear chemistry , analytical chemistry (journal) , chemical engineering , composite material , chemistry , organic chemistry , chromatography , thermal analysis , thermal , physics , quantum mechanics , meteorology , nuclear physics , engineering
The effects on methyl vinyl polysilicone foam of 60 Co γ‐ray radiation at room temperature was studied in air, in vacuo , and in an inert gas atmosphere. The unirradiated and irradiated samples were analyzed by Fourier transform infrared spectroscopy, scanning electron microscopy, pyrolysis gas chromatography/mass spectroscopy, and thermogravimetric analysis, and the gas products after radiation were analyzed by gas chromatography/mass spectroscopy. The changes of the gel fraction, compression properties, and the stress–relaxation ratio with dose for irradiated samples were observed. The results show that the second crosslinking reaction in the polysilicone after chemical crosslinking took place at a low dose (2 × 10 5 Gy), but radiation degradation was predominant, with the dose increasing step by step. The mechanical properties of polysilicone foam gradually became low grade after it was irradiated by any dose in excess of 2 × 10 5 Gy. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 3437–3441, 2003