Suppression of radiation-induced oxidation of polymers by sputtered silicon oxide coating

Citation
W. Zheng et al., Suppression of radiation-induced oxidation of polymers by sputtered silicon oxide coating, J APPL POLY, 83(1), 2002, pp. 186-190
Citations number
10
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Organic Chemistry/Polymer Science","Material Science & Engineering
Journal title
JOURNAL OF APPLIED POLYMER SCIENCE
ISSN journal
0021-8995 → ACNP
Volume
83
Issue
1
Year of publication
2002
Pages
186 - 190
Database
ISI
SICI code
0021-8995(20020103)83:1<186:SOROOP>2.0.ZU;2-P
Abstract
Oxygen barrier coating on polymers was attempted to obtain polymeric compos ite materials with improved radiation resistance. Silicon oxide (SiO1.6) fi lms ranging from 120 to 240 mn thick were formed on polypropylene (PP) and polyethylene (PE) by radio frequency (RF) magnetron sputtering. Oxygen perm eability after SiO1.6 deposition was reduced significantly in all samples s tudied, indicating that silicon oxide is a useful gas barrier. The oxygen p ermeability coefficient of deposited films for PP was 1.7-2.2 x 10(-14) cm( -14) cm(3)-cm(2)/s/cmHg and that for PE was 2.8 - 4.8 x 10(-13) cm(3)-cm/cm (2)/s/cmHg. We studied the effect of such films on the radiation resistance of polymers in the presence of oxygen by microscopic infrared (IR) absorpt ion spectroscopy. Silicon oxide films 180 nm thick were deposited on the su rfaces of PP and PE, and the formation of carbonyl groups after irradiation in air was measured as a function of depth from the surface. Results compa red with those for uncoated PE and PIP showed that the radiation-induced po lymer oxidation is dramatically suppressed by silicon oxide coating. (C) 20 02 John Wiley & Sons, Inc.