Author:
Puglisi Orazio,Licciardello Antonino,Calcagno Lucia,Foti Gaetano
Abstract
The formation of an insoluble gel under ion-beam bombardment is governed by ion-beam parameters and target parameters. Here reported is a study of the influence of the target molecular parameters on the sol–gel transition of ion-bombarded polystyrene with particular emphasis for the number-average molecular weight $\overline M$n. It is shown that the main parameter is the number of macromolecules of the film so that by adopting a “corrected” fluence F/n (ions per macromolecule), the different curves of the various polymers collapse in only one universal curve. The importance of the “corrected” fluence is shown also at molecular level and the MWD of the various polymers is similar at equal F/n values. An experimental model is outlined which explains the sol–gel transition on the basis of transition from an isolated-track regime to an overlap regime where the formation of insoluble giant macromolecules occurs.
Publisher
Springer Science and Business Media LLC
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Cited by
24 articles.
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1. Molecular Depth Profiling with Cluster Ion Beams;Cluster Secondary Ion Mass Spectrometry;2013-04-15
2. Cluster secondary ion mass spectrometry of polymers and related materials;Mass Spectrometry Reviews;2009-05-15
3. Track overlap regime in ion-irradiated PMMA;Journal of Polymer Science Part B: Polymer Physics;1998-03
4. Individual tracks in ion bombarded poly(methyl methacrylate);Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms;1997-08
5. Cross section of ion polymer interaction used to individuate single track regime;Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms;1997-02