Aleš Ručigaj (Author), Žan Kovačič (Author), Žiga Štirn (Author), Matjaž Krajnc (Author)

Abstract

A new epoxy curing system, combining amine and maleimide functionality into a single molecule, was introduced to broaden current state of the art as regards epoxy, amine and maleimide systems. Curing agent aminomaleimide was tested in the curing process of several aromatic and aliphatic epoxies. Prepared mixtures in different weight (molar) ratios were investigated by nonisothermal differential scanning calorimetry to study and compare curing kinetics of different epoxies. The apparent activation energy was determined by Kissinger method, while Friedman method accompanied by Malék statistical approach was used in confirming the autocatalytic nature of epoxy curing and additional maleimide polymerization at the excess amount of aminomaleimide. Thermo-mechanical properties were determined by dynamic mechanical analysis and the effect of aminomaleimide curing agent compared to curing agent containing only amino functional groups was evaluated. Aminomaleimide showed improvement in the glass transition temperatures and higher char yields due to the involvement of maleimide moiety in the curing process. In overall, aminomaleimide showed the positive one-molecule joint effect of the amino group, behaving as an accelerator, and maleimide group, a mechanical properties enhancer.

Keywords

epoksi;amini;maleimid;kinetika zamreževanja;termične lastnosti;epoxy;amine;maleimide;curing kinetics;thermal properties;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FKKT - Faculty of Chemistry and Chemical Technology
UDC: 678.686
COBISS: 17850883 Link will open in a new window
ISSN: 0040-6031
Views: 602
Downloads: 130
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Other data

Secondary language: Slovenian
Secondary keywords: epoksi;amini;maleimid;kinetika zamreževanja;termične lastnosti;
Type (COBISS): Article
Embargo end date (OpenAIRE): 2022-06-01
Pages: str. 1-10
Issue: ǂVol. ǂ690
Chronology: Aug. 2020
DOI: 10.1016/j.tca.2020.178668
ID: 11807745