The joint effect of amine and maleimide functional group in aminomaleimide on the curing kinetics and mechanical properties of epoxy resins

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

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.

• Language: English
• Keywords: epoxy, amine, maleimide, curing kinetics, thermal properties
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Publication status: Published
• Publication version: Author Accepted Manuscript
• Year: 2020
• Number of pages: Str. 1-10
• Numbering: Vol. 690, art. 178668
• PID: 20.500.12556/RUL-116744
• UDC: 678.686
• ISSN on article: 0040-6031
• DOI: 10.1016/j.tca.2020.178668
• COBISS.SI-ID: 17850883
• Publication date in RUL: 08.06.2020

Record is a part of a journal

• Title: Thermochimica acta
• Shortened title: Thermochim. acta
• Publisher: Elsevier
• ISSN: 0040-6031
• COBISS.SI-ID: 832516

Licences

• License: CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
• Link: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Description: The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
• Licensing start date: 08.06.2020

Secondary language

• Language: Slovenian
• Keywords: epoksi, amini, maleimid, kinetika zamreževanja, termične lastnosti

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0191
• Name: Kemijsko inženirstvo