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Hygrothermal ageing effects on FRP laminate and structural foam materials

Hygrothermal ageing effects on FRP laminate and structural foam materials
Hygrothermal ageing effects on FRP laminate and structural foam materials
A programme of dynamic mechanical thermal analysis (DMTA) tests is presented, which was carried out on FRP laminate and PVC foam materials typical of those employed in the sandwich construction of marine craft. The results are compared for as-manufactured material and material that had been aged by fresh water immersion at 40 and 60 °C, in order to determine the evolution of storage modulus, loss modulus, tan ? and glass transition temperature with increasing length and severity of hygrothermal exposure. It was found that plasticisation induced a progressive reduction in room temperature modulus, but there was also evidence of an antiplasticisation process and postcure caused by the elevated temperature immersion, which was revealed upon drying during the DMTA temperature ramp.
a. foams, a. laminates, b. environmental degradation, d. thermal analysis
1359-835X
1237-1247
Earl, J.S.
4c8c0748-35e0-498b-aea0-1a3b30df23ff
Shenoi, R.A.
a37b4e0a-06f1-425f-966d-71e6fa299960
Earl, J.S.
4c8c0748-35e0-498b-aea0-1a3b30df23ff
Shenoi, R.A.
a37b4e0a-06f1-425f-966d-71e6fa299960

Earl, J.S. and Shenoi, R.A. (2004) Hygrothermal ageing effects on FRP laminate and structural foam materials. Composites Part A: Applied Science and Manufacturing, 35 (11), 1237-1247. (doi:10.1016/j.compositesa.2004.04.007).

Record type: Article

Abstract

A programme of dynamic mechanical thermal analysis (DMTA) tests is presented, which was carried out on FRP laminate and PVC foam materials typical of those employed in the sandwich construction of marine craft. The results are compared for as-manufactured material and material that had been aged by fresh water immersion at 40 and 60 °C, in order to determine the evolution of storage modulus, loss modulus, tan ? and glass transition temperature with increasing length and severity of hygrothermal exposure. It was found that plasticisation induced a progressive reduction in room temperature modulus, but there was also evidence of an antiplasticisation process and postcure caused by the elevated temperature immersion, which was revealed upon drying during the DMTA temperature ramp.

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Published date: 2004
Keywords: a. foams, a. laminates, b. environmental degradation, d. thermal analysis

Identifiers

Local EPrints ID: 22876
URI: http://eprints.soton.ac.uk/id/eprint/22876
ISSN: 1359-835X
PURE UUID: 5e9804a0-9e56-4a5a-8682-f81ea337c25e

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Date deposited: 23 Mar 2006
Last modified: 15 Mar 2024 06:41

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Contributors

Author: J.S. Earl
Author: R.A. Shenoi

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