Ray, D and Sarkar, Bijit Kumar and Rana, A K and Bose, Nripati Ranjan (2001) The mechanical properties of vinylester resin matrix composites reinforced with alkali-treated jute fibres. Composites Part A-Applied Science and Manufacturing , 32 (1). 119 -127 . ISSN 1359-835X

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Jute fibres were subjected to alkali treatment with 5% NaOH solution for 0, 2, 4, 6 and 8 h at 30 degreesC. The modulus of the jute fibres improved by 12, 68 and 79% after 4, 6 and 8 h of treatment, respectively. The tenacity of the fibres improved by 46% after 6 and 8 h treatment and the % breaking strain was reduced by 23% after 8 h treatment. For 35% composites with 4 h-treated fibres, the flexural strength improved from 199.1 to 238.9 MPa by 20%, modulus improved from 11.89 to 14.69 GPa by 23% and laminar shear strength increased from 0.238 to 0.283 MPa by 19%. On plotting different values of slopes obtained from the rates of improvement of flexural strength and modulus, against NaOH treatment time, two different failure modes were apparent before and after 4 h of NaOH treatment. In the first region between 0 and 4 h, fibre pull out was predominant whereas in the second region between 6 and 8 h, transverse fracture occurred with minimum fibre pull out. This observation was well supported by the SEM investigations of the fracture surfaces.

Item Type: Article
Uncontrolled Keywords: Vinylester Resin; Mechanical Properties; Fracture
Subjects: Ceramic-Metal Systems
Divisions: Non-Oxide Ceramics & Composites
Depositing User: Mrs Chandana Patra
Date Deposited: 22 Mar 2012 12:32
Last Modified: 21 Nov 2012 06:47
URI: http://cgcri.csircentral.net/id/eprint/1343

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