Stability of Polypropylene Blends Under the Effect of Thermal and UV Degradation

Polypropylene has been blended with ethylene-propylene-diene monomer (EPDM), low-density polyethylene (LDPE), and ethylene-vinyl acetate (EVA) copolymer and their combinations. The obtained films have been subjected to thermal and UV weathering. The relative change in the carbonyl index as a result...

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Bibliographic Details
Published in:Polymer-plastics technology and engineering 2005-01, Vol.44 (5), p.847-862
Main Authors: Abdel-Bary, E. M., Abdel-Razik, E. A., Abdelaal, M. Y., El-Sherbiny, I. M.
Format: Article
Language:English
Subjects:
Ageing
Applied sciences
Exact sciences and technology
Gel fraction
Physical properties
Polymer industry, paints, wood
Polypropylene blends
Properties and testing
Technology of polymers
Thermal and UV-aging
UV stabilizer
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Summary:Polypropylene has been blended with ethylene-propylene-diene monomer (EPDM), low-density polyethylene (LDPE), and ethylene-vinyl acetate (EVA) copolymer and their combinations. The obtained films have been subjected to thermal and UV weathering. The relative change in the carbonyl index as a result of thermal and UV aging has been determined by using FT-IR spectroscopy. In addition, the thermal behavior of these blends has been followed up by using thermogravimetric analysis. In addition, sol-gel analysis of the films before and after aging has been conducted in p-xylene and correlated with the extent of oxidation. The effects of different factors, such as blend composition, addition of UV stabilizer, and mixing and blending method on the aging characteristics, have been studied.
ISSN:0360-2559
1525-6111
DOI:10.1081/PTE-200060842