Title: EFFECTS OF STYRENE EVAPORATION ON THE CURE KINETICS BEHAVIOUR OF A VINYLESTER RESIN SYSTEM SUITABLE FOR COMPOSITE PULTRUSION
Page Range: p.623-632
Author(s): Samaras Z I; Partridge I K
File size: 130K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 11
Issue No: No. 8
Abstract
An experimental and modelling methodology is described, by which the effects of styrene evaporation on the cure kinetics and the conversion evolution in a vinylester resin is studied and quantified. Under the particular geometry and environmental conditions used in the experiments, styrene losses up to 6% of the initial styrene concentration per day are observed.. The complex curing reaction was modelled with empirical equations, and the overall curing mechanism was found to be unaffected by the styrene evaporation. The maximum reduction in the final Tg of a fully cured sample was found to be 3 degrees C, for styrene losses of over 25% of the original amount, and is therefore not considered to be of significant concern in the pultrusion process with this vinylester resin. The exothermicity of the reaction, however, was significantly affected by the reduction in styrene content. Practical solutions for preventing this are suggested. 22 refs.
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