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Spatial heterogeneity of thermo-oxidative degradation in impact poly(propylene) copolymers

dc.contributor.authorDe Goede E.
dc.contributor.authorMallon P.E.
dc.contributor.authorRode K.
dc.contributor.authorPasch H.
dc.date.accessioned2012-01-18T08:06:38Z
dc.date.available2012-01-18T08:06:38Z
dc.date.issued2011
dc.identifier.citationMacromolecular Materials and Engineering. 296(11), 1018-1027
dc.identifier.citationhttp://www.scopus.com/inward/record.url?eid=2-s2.0-80755169427&partnerID=40&md5=8ae932c62f16d409e214305ba3c509eb
dc.identifier.issn14387492
dc.identifier.other10.1002/mame.201100061
dc.identifier.urihttp://hdl.handle.net/10019.1/19201
dc.descriptionPlease help us populate SUNScholar with the post print version of this article. It can be e-mailed to: scholar@sun.ac.za
dc.description.abstractThe spatial degradation in impact PP copolymers with different ethylene contents is studied by FTIR microscopy and layer-by-layer milling of the sample surfaces, followed by ATR-FTIR, SEC, and CRYSTAF analysis. FTIR allows for tracking of the rate of degradation, providing information on the depth profiling of the degradation. Results show that samples with lower ethylene content degrade faster at all depths than those with higher ethylene content. The latter show a more uniform degradation from the surface to the bulk of the material at longer degradation times. This is ascribed to the higher amorphous content which results in a larger oxygen diffusion to the centre of the material while its slower rate of degradation is ascribed to the lower tertiary carbon content. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
dc.subjectAmorphous content
dc.subjectATR FTIR
dc.subjectCarbon content
dc.subjectFTIR
dc.subjectFTIR microscopy
dc.subjectimpact PP copolymers
dc.subjectLayer-by-layers
dc.subjectLower Tertiary
dc.subjectOxygen diffusion
dc.subjectPoly(propylene) copolymers
dc.subjectSample surface
dc.subjectSpatial degradation
dc.subjectSpatial heterogeneity
dc.subjectThermo-oxidative degradation
dc.subjectAmorphous carbon
dc.subjectCopolymerization
dc.subjectCopolymers
dc.subjectDepth profiling
dc.subjectEthylene
dc.subjectGel permeation chromatography
dc.subjectPolypropylenes
dc.subjectPropylene
dc.subjectDegradation
dc.titleSpatial heterogeneity of thermo-oxidative degradation in impact poly(propylene) copolymers
dc.typeArticle


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