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Water Sorption Studies in a RGP Contact Lens Polymer Paraperm by Positron Lifetime Technique

✍ Scribed by Thimmegowda, M.C. ;Sathyanarayana, P.M. ;Shariff, Gani ;Ashalatha, M.B. ;Ramani, R. ;Ranganathaiah, C.

Publisher
John Wiley and Sons
Year
2002
Tongue
English
Weight
132 KB
Volume
193
Category
Article
ISSN
0031-8965

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## Abstract The kinetics of water sorption, the topology or the free‐volume changes due to the presence of sorbed water in a soft contact lens polymer, poly(2‐hydroxyethyl methacrylate), were investigated by using the positron lifetime technique. It was found that the ortho‐positronium lifetime inc