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The effect of UV irradiation on structure and mechanical behaviour of .beta. nucleated polypropylene
- 1.0189185 - UMCH-V 20033140 RIV DE eng C - Conference Paper (international conference)
Kotek, Jiří - Kelnar, Ivan - Baldrian, Josef - Raab, Miroslav
The effect of UV irradiation on structure and mechanical behaviour of .beta. nucleated polypropylene.
Proceedings. HalleWittenberg: MartinLutherUniversität, 2003, s. -.
[Tagung Deformation und Bruchverhalten von Kunststoffen /9./. Halle-Wittenberg (DE), 25.06.2003-27.06.2003]
R&D Projects: GA ČR GP106/02/P027; GA ČR GA106/02/1249; GA ČR GA106/01/0601
Institutional research plan: CEZ:AV0Z4050913
Keywords : isotactic polypropylene * .beta. nucleation * photo-degradation
Subject RIV: CD - Macromolecular Chemistry
Isotactic polypropylene modified by a specific .beta. nucleation agent was exposed to UV photo-degradation and characterized by x-ray diffraction and tensile testing. A decrease of the content of the crystalline .beta. phase and an increase of the size of the .beta. crystallites indicated an allotropic .beta.-.alpha. re-crystallization. A decrease of the strain at break was ascribed to the formation of surface microcracks. The results are discussed in relation to the effect of thermal aging.
Permanent Link: http://hdl.handle.net/11104/0085021
Number of the records: 1