Synthesis and Physico-Chemical Study of Epoxy Methacrylate of 9,9’-Bis(4-Hydroxy Phenyl) anthrone-10 and its Jute and Glass Composites

By : J. D. Thanki , P. H. Parsania

Page No: 305-317

Abstract
Epoxy methacrylate resin of 9,9’-bis(4-hydroxy phenyl)anthrone-10 (EANMA) was synthesized by condensing 0.01 equivalent of epoxy resin of 9,9’-bis(4-hydroxy phenyl)anthrone-10 (EAN) (9.30 g) and 0.021 equivalent methacrylic acid (MAA) (1.81 g) using 1 mL triethyl amine as a catalyst, 0.25 g hydroquinone as an inhibitor and 35 mL tetrahydrofuran as a solvent at reflux temperature for 1-7 h. Styrene was used as a reactive diluent. The structure of EANMA was supported by Fourier Transform Infrared (FTIR) and proton nuclear magnetic resonance (1 HNMR). EANMA and styrenated EANMA (EANMAS) were characterized by differential scanning calorimetric (DSC) and thermo gravimetric analysis (TGA). Both the resins showed good thermal stability and followed multistep degradation reactions of zero order. Jute (J-EANMAS) and glass (G-EANMAS) composites of EANMAS were fabricated by hand lay-up technique followed by compression molding under 20 bar pressure and at 120 o C for 5 h. J-EANMAS and G[1]EANMAS showed 38.8 and 192.9 MPa tensile strength; 30.9 and 90.1 MPa flexural strength; 3.0 and 5.9 kV mm-1 electric strength; and 1.9 x 1011 and 3.1 x 1013 Ohm cm volume resistivity. Both jute and glass composites showed excellent hydrolytic stability even in harsh acidic, alkaline and saline environments and also in boiling water. Little effect of nature of electrolytes on water absorption was found. Equilibrium time in boiling water was reduced to a greater extent. Both jute and glass composites may be useful for low load bearing housing units, and in electrical, electronic and marine fields.

Authors :
J. D. Thanki and P. H. Parsania: Polymer Chemistry Division, Department of Chemistry, Saurashtra University, Rajkot-360 005, India