Picture of virus under microscope

Research under the microscope...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

Explore SIPBS research

The dimensional stability of glass-fibre reinforced Polyamide 66 during hydrolysis conditioning

Thomason, J.L. and Ali, J.Z. (2009) The dimensional stability of glass-fibre reinforced Polyamide 66 during hydrolysis conditioning. Composites Part A: Applied Science and Manufacturing, 40 (5). pp. 625-634. ISSN 1359-835X

[img]
Preview
PDF (strathprints007651.pdf)
strathprints007651.pdf

Download (346kB) | Preview

Abstract

Injection moulded glass-fibre reinforced polyamide 66 composites based on two glass fibre products with different sizing formulations and unreinforced polymer samples have been characterised both dry as moulded and during conditioning in a water-glycol mixture at 70°C for a range of times up to 400 hours. The results reveal that hydrothermal ageing in water-glycol mixtures causes significant changes in the weight and dimensions of these materials. All conditioned materials showed a time dependent weight increase which could be characterised as pseudo-Fickian. The weight change could be well modelled by a Fickian diffusion process with a time dependent diffusion coefficient. It was not apparent that changing the glass fibre sizing affected the dimensional stability of the composites. There was a strong correlation between the swelling of these samples and the level of fluid absorption. The composites exhibited different levels of swelling depending on direction. These effects were well in line with the influence of fibres on restriction of the matrix deformation in the fibre direction. These differences correlated well with the average fibre orientation with respect to the various direction axes.