Please use this identifier to cite or link to this item:
|Title:||Curing studies of unsaturated polyester resin used in FRP products|
Babu, B J C
Peak exothermic temperature
|Abstract:||Fiber reinforced plastics (FRP) products being strong and light in weight, find extensive applications in automobiles, marine, structural and household components. Unsaturated polyester (UP) resin is a principle binder material used in FRP products. Curing of UP resin is a key for successful FRP processing. Gel time (<i style="">t</i><sub>gel</sub>) and peak exothermic temperature (θ<sub>peak</sub>) are critical measures of curing of resin. <i style="">t</i><sub>gel</sub> indicates commencement of polymer cross-linking (setting) while θ<sub>peak</sub> controls shrinkage and cracking of polymer. This paper aims to predict the <i style="">t</i><sub>gel</sub> and θ<sub>peak</sub> during cure of UP resin. The weight percent of methyl ethyl ketone peroxide (MEKP) as catalyst, cobalt octoate (C<sub>oct</sub>) as an accelerator, calcium carbonate (CaCO<sub>3</sub>) as filler and glass fibers as reinforcements are used as process variables. The variations in <i style="">t</i><sub>gel </sub>and<sub> </sub>θ<sub>peak </sub>are approximated by regression equations. Strong interactions are found between the process variables. The process optimization is made to achieve a desired combination of <i style="">t</i><sub>gel</sub> and θ<sub>peak</sub> within the regime of experimentation. Confirmatory experiments are performed to validate the predicted results.|
|ISSN:||0975-1017 (Online); 0971-4588 (Print)|
|Appears in Collections:||IJEMS Vol.18(1) [February 2011]|
Items in NOPR are protected by copyright, with all rights reserved, unless otherwise indicated.