Degradation of ROMP-based bio-renewable polymers by UV radiation

The degradation of a bio-renewable polymer under UV exposure was studied using various methods. Degradation of the bio-renewable polymer increased with increasing exposure time. Enhanced cross-link density in the early stage of degradation was confirmed by Soxhlet extraction. Tensile testing showed...

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Bibliographic Details
Published in:Polymer degradation and stability 2013-11, Vol.98 (11), p.2357-2365
Main Authors: Cui, Hongyu, Hanus, Riley, Kessler, Michael R.
Format: Article
Language:English
Subjects:
Ageing
Applied sciences
Auto-oxidation
Bio-renewable
Crosslinking
Degradation
Density
Ductile brittle transition
Embrittlement
Exact sciences and technology
Failure
Photo-degradation
Physical properties
Polymer industry, paints, wood
Polymers
Properties and testing
Reduction
Technology of polymers
UV degradation
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Summary:The degradation of a bio-renewable polymer under UV exposure was studied using various methods. Degradation of the bio-renewable polymer increased with increasing exposure time. Enhanced cross-link density in the early stage of degradation was confirmed by Soxhlet extraction. Tensile testing showed a transition from ductile failure to brittle fracture. Surface cracks and embrittlement were primary reasons for most reductions in mechanical properties, such as tensile strength and breaking strain. The effects of degradation were confined to the surface of thick bio-based polymer specimens, confirmed by both SEM and PAS-FTIR. Depth profile studies of degraded samples showed that the concentration of oxidation products, such as hydroxyl and carbonyl groups, varied with depth depending on the diffusion of oxygen.
ISSN:0141-3910
1873-2321
DOI:10.1016/j.polymdegradstab.2013.08.003