Thermooxidation-induced Surface Modifications of the Ethylene–Methyl Acrylate Copolymer as Investigated by Time-of-flight Particle-induced Desorption Mass Spectrometry. Part II: The Copolymer

✍ Scribed by B. Nsouli; P. Dole; H. Allali; J. Chauchard; J.-P. Thomas

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 510 KB
• Volume: 10
• Category: Article
• ISSN: 0951-4198
• DOI: 10.1002/(sici)1097-0231(19960131)10:2<162::aid-rcm439>3.0.co;2-u

✦ Synopsis

Surface chemical modifications due to thermooxidation of the poly(ethy1ene-co-methyl acrylate) elastomer have been investigated by secondary-ion emission techniques complemented by X-ray photoelectron spectroscopy. Contradictory findings resulting from different depths of emission were reconciled by using time-of-flight particle-induced desorption mass spectrometry (TOF-PDMS). it is observed that the oxidation process (180 "C) leads to a surface enrichment of oxidized polyethylene sequences with an almost complementary decrease of the polymethylacrylate contribution. This is tentatively interpreted in terms of conformational surface rearrangement (accumulation of PE blocks to the detriment of those of PMA), closely related to the progress of the cross-linking process occurring in the bulk of the material.