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Effects of Ion Beam Bombardment on the Crystalline Structure of Polymers: The Case of Pet+

Published online by Cambridge University Press:  25 February 2011

R.M. Prppleo ,
M.R. Rrrujo  and
R.P. Livi
R.M. Prppleo
Affiliation:
Instituto de Fisica
M.R. Rrrujo
Affiliation:
Instituto de Quimica Universidade Federal do Rio Grande do Sul, Campus do Vale, 91500, Porto Rlegre, RS, Brasil
R.P. Livi
Affiliation:
Instituto de Fisica
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Abstract

We discuss the amorphization process of semicrystalline and oriented PET (Polytethyleneterephtal ate)) thin toils by ion beam irradiation. P decrease in the bombarded samples melting point and enthalpy of fusion in the bombarded samples, as analysed by Differential Scanning Calorimetry (DSC), is associated with changes in the crystalline morphology and with an increase in the polymer disordered regions. Those facts are confirmed atso by a large decrease in the main X-ray diffraction peak amplitude as the tluence increases. P model of ion induced amorphization originally constructed for metals and semiconductors 11,23 was applied and cross-sections tor the process were obtained. The experimental data are well fitted using this model based on amorphization through the overlap of damage clusters, but an exclusive elastic collisions mechanism for the damage production cannot be inferred. As expected the electronic stopping mechanism also plays an important role in the polymer amorphization process.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 157: Symposium A – Beam-Solid Interactions: Physical Phenomena , 1989 , 617
Copyright
Copyright © Materials Research Society 1990

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References

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