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8326697 
Journal Article 
Vapor sorption process in poly(ethylene terephthalate) studied by pal 
Sanchez, V; Lopez, R; Fucugauchi, LA; Ito, Y 
1995 
1 
Materials Science Forum
ISSN: 0255-5476
EISSN: 1662-9752 
Trans Tech Publ 
Beijing, China 
175-178 
pt 2 
773-776 
English 
WOS:A1995BD21L00166 
The effects of sorption of various molecules in a glassy polymer, poly(ethylene terephthalate), on I3 and λ3 were measured. With benzene and acrylic acid as the sorbed vapors, τ 3 was decreased without changing I3. Conversely, with n-hexane, cyclohexane and water as the vapors, I3 was decreased without a change in λ3. With methylmethacrylate both I3 and λ3 were decreased. It has been found that these different effects are related to the differences in the solubility parameters. The role of o-Ps as probe of vapor sorption in polymers is discussed. 
He, YJ; Cao, BS; Jean, YC; 
0-87849-686-6 
10th International Conference on Positron Annihilation (ICPA-10) 
BEIJING, PEOPLES R CHINA