Airageingpaper-final.pdf (184.85 kB)
Degradation studies of crosslinked polyethylene. 1, Aged in air
journal contribution
posted on 2007-08-02, 15:30 authored by L. Amato, Marianne Gilbert, Andrew CaswellSilane crosslinking of polyethylene, carried out by grafting an organofunctional silane
(vinyltrimethoxysilane) onto polyethylene and by subsequent moisture crosslinking in hot water
using a tin catalyst, has been widely used in industrial applications because of its advantages in
terms of low cost and easy processing. This study focused on the degradation processes which
occurred in the material after air ageing in an oven; temperatures ranged from 90 to 220°C,
while ageing times ranged from 2h to 500h. Significant structural changes were observed
according to the different ageing conditions (below and above the melting region of the
material), since the carbonyl group concentration increased substantially during ageing above
the melting region and the silicone containing groups were also affected by the degradation.
These structural changes affected the mechanical and thermal properties of the material, which
was annealed at lower ageing temperatures (up to 155°C) and highly degraded at higher
temperatures, when C-C crosslinks formed. Experimental design software was used in order to
optimise the number of experimental trials and to model the results obtained; its analysis
contributed to the interpretation of the results.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Materials
Citation
AMATO, l., GILBERT, M. and CASWELL, A., 2005. Degradation studies of crosslinked polyethylene. 1, Aged in air. Plastics, Rubber and Composites, 34 (4), pp. 171-178Publisher
© Maney PublishingPublication date
2005Notes
This article was published in the journal, Plastics, Rubber and Composites [© Maney Publishing] and is available at: https://doi.org/10.1179/174328905X55614.ISSN
1465-8011;1743-2898Publisher version
Language
- en