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Electron‐Beam‐Induced Radiation Effects on Siloxane Foam
Author(s) -
Huang Wei,
Gao Xiaoling,
Xiong Jie,
Xiong Liangping,
Xu Yunshu,
Fu Yibei
Publication year - 2010
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200900102
Subject(s) - siloxane , materials science , irradiation , electron paramagnetic resonance , fourier transform infrared spectroscopy , composite material , chemical engineering , polymer , nuclear magnetic resonance , physics , nuclear physics , engineering
Summary: Two types of siloxane foam were irradiated by an electron beam at room temperature. Changes in the chemical structure of the samples were determined by Fourier‐transform infrared resonance. The gaseous products from the irradiated samples were analyzed by gas chromatography and mass spectroscopy. Electron spin resonance was used to analyze the free radicals, and the compression properties were determined by a universal material tester. The results indicated that the effect of absorbed dose on the mechanical properties of polymethylvinyl siloxane foam was more pronounced than that for polymethylphenylvinyl siloxane foam. The yield of gases evolved from the radiation degradation of polymethylvinyl siloxane foam was higher than that from polymethylphenylvinyl siloxane foam. The free‐radical signal from polymethylphenylvinyl siloxane foam was stronger and lasted longer than that from polymethylvinyl siloxane foam after irradiation.