Roll-drawing and die-drawing of toughened poly(ethylene terephthalate). Part 2. Fracture behaviour

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DOIResolve DOI: http://doi.org/10.1016/j.polymer.2004.10.090
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TypeArticle
Journal titlePolymer
Volume46
Issue6
Pages19671981; # of pages: 15
SubjectToughened PET; oriented polymers; fracture toughness
AbstractOrientation of polymers in the solid-state has been used for a long time in enhancing the properties of the products and the die-drawing process at Leeds University (UK) and the roll-drawing process at IMI (Canada) have been used to produce oriented polymer products in a wide variety of shape and sizes. In this work, we explore the fracture behaviour of isotropic and oriented toughened poly(ethylene terephthalate) (PET) in order to improve the toughness of the oriented products in a direction other than the principal draw direction. The fracture behaviour of isotropic and oriented PET homopolymer and the two PET blends (containing 10% polyethylene elastomer and 10% compatibilized elastomer) was studied using the multi-specimen J-integral approach. In the isotropic case, the compatibilized blend had higher toughness than the homopolymer and the non-compatibilized blend. The oriented sheets from the die-drawing and roll-drawing process, drawn to a draw ratio of 3.2 at 170 °C were tested with the initial notch both parallel and perpendicular to the draw direction. For the former case, the compatibilized blend was tougher and in the other direction the drawn homopolymer was tougher than the blends. At similar draw ratios, the fracture behaviour and the toughness of the oriented sheets from the die-drawing and roll-drawing processes were identical.
Publication date
LanguageEnglish
AffiliationNRC Industrial Materials Institute; National Research Council Canada
Peer reviewedNo
NRC number54323
NPARC number18432724
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Record identifiera741fc1e-d16c-4552-a4ce-5ced7fb7f414
Record created2011-08-23
Record modified2016-05-09
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