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ARTICLE

Glass/Biofibers/Epoxy Methacrylate of Bisphenol-C Sandwich Composites: Comparative Mechanical and Electrical Properties and Chemical Resistance

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Department of Chemistry, Saurashtra University, Rajkot-360 005, Gujarat, India

* Corresponding Authors: e-mail: ,

Journal of Polymer Materials 2021, 38(1-2), 71-87. https://doi.org/10.32381/JPM.2021.38.1-2.7

Abstract

Glass/Biofibers/Epoxy methacrylate of bisphenol-C (G/BF/EBCMAS) sandwich composites was prepared by compression molding. G/BF/EBCMAS showed good mechanical and good to excellent electrical properties and excellent chemical resistance. Studied properties are compared with EBCMAS and G/EBCMAS. In comparison with G/EBCMAS, G/BF/EBCMAS showed considerable decline of tensile strength (18-63.4%), flexural strength (18.8-38.7%), flexural modulus (12.8-50.7%), Izod impact strength (17.4-43.5%), Barcol hardness (2.1-16.7%) and dielectric strength (23.8-76.8%) except flexural strength of G/BM/EBCMAS. G/WC/EBCMAS (96.7%), G/B/EBCMAS (79.2%), G/GN/EBCMAS (83.3%) and G/RH/EBCMAS (97.9%) showed decline of volume resistivity, whereas other sandwich composites showed 1150-58233% improvement. The decrease in mechanical properties and dielectric strength of G/BF/EBCMAS sandwich composites is mainly due to poor interfacial adhesion and randomly oriented fibers. Water absorption trend in different environments is H₂SO₄ (10.9-12.7%) > HCl (10.5-12.3%) > NaOH (9.5-11.7%) > H₂O (8.3-11.0%) > NaCl (7.9-10.1%). Saturation time for G/BF/ EBCMAS in different environments is 336-384 h (H₂O), 228-360 h (NaCl), 336-360 h (NaOH and HCl) and 312-360h (H₂SO₄), which is comparable with G/EBCMAS (336-384) except G/BC/EBCMAS (288 h, NaCl), G/B/EBCMAS (312 h, H₂ O) and G/GN/ EBCMAS (228 h, NaCl). Sandwich composites may be useful for low-cost housing and other specific applications.

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