Isolation and evaluation of extractable materials in commercial polyolefins

Kotsokoane, Moses T. (2007-03)

Thesis(MSc) -- University of Stellenbosch, 2007.

Thesis

ENGLISH ABSTRACT: Four homopolymer and five propylene-ethylene random copolymer samples produced from two different polypropylene production plants were used as test materials in this study. These materials were isolated into various fractions using the following techniques; xylene and decalin extractions, successive extractions and TREF. The types of fractions isolated with the abovementioned techniques were analysed using GPC, NMR and DSC. From the analytical results it was concluded that the extraction techniques isolate various types of fractions making up the polymer.

AFRIKAANSE OPSOMMING: Vier homopolimeer en vyf lukrake kopolimeer monsters wat by twee verskillende polipropileen vervaardigingsaanlegte gemaak is, is gebruik as toetsmateriale in hierdie studie. Die materiale is in verskillende fraksies geisoleer deur gebruik te maak van xileen en dekalien ekstraksies, opeenvolgende ekstraksies, en stygende temperatuur uitloging fraksionering (Eng: "TREF"). Die fraksies wat sodoende geisoleer is, is deur GPC, KMR en DSC geanaliseer. Vanuit die analise-resultate is tot die gevolgtrekking gekom dat die ekstraksietegnieke almal verskillende fraksies van die oorpronklike materiale isoleer.

Please refer to this item in SUNScholar by using the following persistent URL: http://hdl.handle.net/10019.1/50727
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