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Mechanické vlastnosti smršťovacích LLDPE fólií v závislosti na jejich složení / Influnce of chemical composition on mechanical properties of LLDPE stretch film

Thesis summarizes the problems of production and use of stretch film. The change of strength, ductility and relative relaxation effect in different times of drawing from role in three weeks was observed. Further, change of strength and ductility due to changes in the rate of deformation, exposure to accelerated aging in a UV chamber and changes in the loading direction were observed. Mechanical tests were realized on a tensile tester, relaxation tests on DMA and crystallinity changes were observed on the DSC. Relationship between chemical composition of stretch film and mechanical and thermomechanical properties were studied. It was found that chemical composition essential for stretch film properties. However, due to the impossibility to distinguish effects of chemical composition and process parameters was impossible to find clear relation describing this relationship.

Identiferoai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:217140
Date January 2015
CreatorsVojáček, Jakub
ContributorsTocháček, Jiří, Poláček, Petr
PublisherVysoké učení technické v Brně. Fakulta chemická
Source SetsCzech ETDs
LanguageCzech
Detected LanguageEnglish
Typeinfo:eu-repo/semantics/masterThesis
Rightsinfo:eu-repo/semantics/restrictedAccess

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