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Effect of phase condition on the low-temperature radiation-induced degradation of polycarbonate as studied by spectroscopic techniques

Authors
Journal
Polymer
0032-3861
Publisher
Elsevier
Publication Date
Volume
42
Issue
5
Identifiers
DOI: 10.1016/s0032-3861(00)00431-6
Keywords
  • Polycarbonate
  • Radiolysis
  • Crystallinity Effect
Disciplines
  • Physics

Abstract

Abstract Effect of phase condition (crystallinity) on the low-temperature radiation-induced degradation of polycarbonate was studied by electron spin resonance (ESR) and infrared (IR) spectroscopy. Semi-crystalline polycarbonate exhibits lower relative yields of radiation-induced degradation in comparison with amorphous polycarbonate, as evidenced by monitoring of both CO and CO 2 formation (IR spectroscopy), and radical pair formation (ESR spectroscopy). On the basis of results obtained, the mechanism of electron stabilisation in polycarbonate, and reasons of variation in radical pair inter-spin distance are discussed.

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