HEAVY-ION TRACKS IN POLYCARBONATE - COMPARISON WITH A HEAVY-ION IRRADIATED MODEL-COMPOUND (DIPHENYL CARBONATE)

Authors
Citation
E. Ferain et R. Legras, HEAVY-ION TRACKS IN POLYCARBONATE - COMPARISON WITH A HEAVY-ION IRRADIATED MODEL-COMPOUND (DIPHENYL CARBONATE), Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 82(4), 1993, pp. 539-548
Citations number
45
Categorie Soggetti
Physics, Nuclear","Nuclear Sciences & Tecnology","Instument & Instrumentation
ISSN journal
0168583X
Volume
82
Issue
4
Year of publication
1993
Pages
539 - 548
Database
ISI
SICI code
0168-583X(1993)82:4<539:HTIP-C>2.0.ZU;2-6
Abstract
The chemical modifications induced by energetic heavy ion irradiation of polycarbonate (PC) film are determined by GPC, HPLC, ESR, TGA, IR a nd UV spectrophotometry. The main results of the irradiation are creat ion of radicals, chain scission, cross-linking and appearance of new c hemical groups in the main polymer chain. As far as the creation of ne w groups is concerned, they are determined by means of a model compoun d of PC: the diphenyl carbonate (DPC). The following compounds are ide ntified after energetic heavy ion irradiation of DPC: salicylic acid, phenol, 4,4'-biphenol, 2,4'-biphenol, 2,2'-biphenol, 4-phenoxyphenol, 2-phenoxyphenol, phenyl ether, phenyl benzoate, phenyl salicylate, 2-p henylphenol and 2-phenoxyphenyl benzoate. A similarity between the hea vy ion irradiation and a heat treatment has also been established with DPC. On the basis of these results, we try to give an explanation of the preferential attack along the tracks of the irradiated film. Also, an explanation of the well-known beneficial effect of an UV expositio n of the irradiated film on the selectivity of this preferential chemi cal attack is suggested.