Transcription of IONIZING RADIATION-INDUCED CROSSLINKING AND …
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Chapter 7 IONIZING RADIATION-INDUCED CROSSLINKING AND DEGRADATION OF POLYMERSG iuseppe Spadaro, Sabina Alessi, Clelia DispenzaUniversit degli Studi di Palermo, Dipartimento di Ingegneria Chimica, Gestionale, Informatica, Meccanica, Edifi cio 6, Viale delle Scienze, 90128 Palermo, Italy1. INTRODUCTION The interaction of IONIZING radiation with matter results in the formation of very reactive species (free neutral radicals, cationic and anionic ions, excited molecules). These can signifi cantly modify the molecular structure of the irradi-ated material. In particular, irradiation of organic polymers induces molecular chain branching, CROSSLINKING and molecular degradation or scissioning.
The quantitative determination of molecular modi fi cations induced by ion- ... lar molecular structure but different degrees of crystallinity give different values of G(X) and G(S) for the same irradiation conditions. For example, in ... polymer cause a more uniform oxidation within the material, while a marked ...
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