Formation de gels de poly (N-vinylpyrrolidone) par l'action des rayons gamma sur des solutions aqueuses de poly(N-vinylpyrrolidone)
作者： A. Chapiro , C. Legris
DOI: 10.1016/0014-3057(85)90064-3
关键词:
摘要: The gamma radiolysis of aqueous solutions PNVP was investigated. Solutions containing 1–30 g per 100 ml were subjected to doses up 8 KGy (8 Mrad). increase the viscosity determined during pre-gel stage. respective values sol and gel fractions measured at higher than critical dose for formation D∗. It found that D∗increases with concentration initial polymer solution it independent dose-rate. experimental are in good agreement equation Charlesby Pinner. radiation chemical yields cross-linking G(cross-links) derived from D using two methods. is very small 1% increases steadily polymer. various competing processes which account observed relationships considered.
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