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Effects of process parameters on selected properties of liquid compression-molded vinyl ester sheets


Abd. Rahman, Mohamed and Salit, Mohd Sapuan and Mridha, Shahjahan and Abdan, Khalina (2009) Effects of process parameters on selected properties of liquid compression-molded vinyl ester sheets. In: 9th National Symposium on Polymeric Materials 2009 (NSPM 2009), 14-16 Dec. 2009, Residence Hotel, Uniten, Putrajaya. (pp. 413-418).


Vinyl esters combine the best of polyesters and epoxies in terms of properties and processing. Without complicating presence of reinforcing fibers, this study investigated the effects of catalyst amount, preheating time, molding temperature and pressure on flexural properties and water absorption of cast vinyl ester (VE) using a factorial experiment. All four factors did not affect the flexural properties of molded VE significantly. Using high molding pressure however caused higher water absorption. Molded VE-unsaturated polyester (UP) blend was a significantly different material which was 1.49 times stronger, 2.38 times more flexible but 0.69 less stiff than neat VE and with significantly worse water absorption property. The results obtained warrant further investigation in process optimization of VE molding and use of VE-UP blend as matrix for natural fiber-reinforced composites.

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Additional Metadata

Item Type: Conference or Workshop Item (Paper)
Divisions: Faculty of Engineering
Institute of Tropical Forestry and Forest Products
Keywords: Vinyl ester; Compression molding; Factorial experiment; Flexural properties; Water absorption
Depositing User: Nabilah Mustapa
Date Deposited: 01 Mar 2017 09:44
Last Modified: 01 Mar 2017 09:44
URI: http://psasir.upm.edu.my/id/eprint/50314
Statistic Details: View Download Statistic

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