Journals Information
Universal Journal of Materials Science Vol. 4(1), pp. 1 - 7
DOI: 10.13189/ujms.2016.040101
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Diffusion Controlled Oxidative Degradation of Un-stabilised Polyethylene
Drahosh Vesely *, Lucia Castro-Diaz
Department of Materials, Oxford University, UK
ABSTRACT
The chemical degradation processes of HDPE at 110℃ in air have been studied using light microscopy, FTIR analysis, micro-hardness and OsO4 staining. It is shown that carbonyl groups C=O, (as detected by FTIR) are formed only in the surface layer and the effect on mechanical properties is marginal. On the other hand the formation of isolated and conjugated C=C double bonds (as detected by OsO4 staining), show that cutting properties and micro-hardness are significantly altered. The progress of the degraded layer follows a diffusion process with sharp front and saturated concentration behind. An attempt is made to explain these observations by formation and mobility of free radicals. It is also shown that processing method, injection or compression moulding, can significantly influence the degradation process and the mechanical performance of the moulded component.
KEYWORDS
Permeability, Diffusion, uPVC, Acetone, FTIR Microscopy
Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Drahosh Vesely , Lucia Castro-Diaz , "Diffusion Controlled Oxidative Degradation of Un-stabilised Polyethylene," Universal Journal of Materials Science, Vol. 4, No. 1, pp. 1 - 7, 2016. DOI: 10.13189/ujms.2016.040101.
(b). APA Format:
Drahosh Vesely , Lucia Castro-Diaz (2016). Diffusion Controlled Oxidative Degradation of Un-stabilised Polyethylene. Universal Journal of Materials Science, 4(1), 1 - 7. DOI: 10.13189/ujms.2016.040101.