Synthesis and characterization of 1, 3-bis(maleimido) benzene-modified and 1, 6-bis(maleimido) hexane-modified epoxy-novolac interpenetrating networks

Vanaja, A and Rao, RMVGK (2002) Synthesis and characterization of 1, 3-bis(maleimido) benzene-modified and 1, 6-bis(maleimido) hexane-modified epoxy-novolac interpenetrating networks. High Performance Polymers, 14 (4). pp. 363-382.

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Abstract

Epoxy-novolac (EPN) resin was modified by blending with in-house-synthesized 1, 3-bis(maleimido) benzene and 1, 6-bis(maleimido) hexane. These blends were cured with 4, 4'-methylenedianiline. The cure behaviour of these systems was studied using differential scanning calorimetry (DSC) at different blend compositions of bismaleimide (BMI) varied between 5 and 15% by weight. The thermograms indicated a unimodal exothermic peak for blends containing lower percentages of bismaleimide. All the cured blends showed much higher glass transition temperatures (Tg) than that of the host matrix, namely unmodified epoxy-novolac resin. The thermal stability as studied by thermogravimetric analysis (TGA) of the cured EPN resin was found to improve with BMI blending and varied with the type of BMI. A homogeneous structure of these blends with no phase separation was confirmed both by DSC analysis and scanning electron microscopy (SEM).

Item Type: Journal Article
Uncontrolled Keywords: Aromatic compounds; Blending; Curing; Differential scanning calorimetry; Glass transition; Interpenetrating polymer networks; Phase separation; Scanning electron microscopy; Synthesis (chemical); Thermodynamic stability; Thermogravimetric analysis; Thermograms; Epoxy resins;
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Division/Department: Fibre Reinforced Plastics Division, Fibre Reinforced Plastics Division
Depositing User: MS Jayashree S
Date Deposited: 07 Jan 2005
Last Modified: 24 May 2010 09:38
URI: http://nal-ir.nal.res.in/id/eprint/65

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