The cure kinetics of CTBN-modified epoxy system

W. Jae-Young; S. Mi-Ja; K. Sang-Wook

doi:10.14314/polimery.2000.036

Published : 2022-09-21

Vol. 45 No. 1 (2000)

The cure kinetics of CTBN-modified epoxy system

W. Jae-Young S. Mi-Ja K. Sang-Wook

DOI: https://doi.org/10.14314/polimery.2000.036

Abstract

In a epoxy system modified with a carboxyl-terminated butadiene acrylonitrile copolymer rubber, the cure kinetics was studied in terms of the Kissinger equation and of the autocatalytic cure rate expression. By the former equation, a simple n-th order rate equation, DSC measurements allowed to determine the activation energy and the pre-exponential factor; by the latter equation, isothermal DSC analysis allowed to determine the rate constants and reaction orders. The two methods were found suitable to follow the cure kinetics of the epoxy system. In the system modified with CTBN, the cure rate was initially higher than that in the system with CTBN added, on account of the catalytic role of the -COOH groups in CTBN. At a degree of conversion equal to about 0.6, the cure rate was inverted on account to the formation of the CTBN domain.

Keywords

żywica epoksydowa ; kopolimer butadien-akrylonitryl z końcowymi grupami -COOH ; kinetyka utwardzania ; równanie Kissingera ; równanie szybkości reakcji autokatalitycznej cure kinetics ; Cooh-terminated butadiene-acrylonitrilecopolymer ; CTBN-modified epoxy system ; Kissinger equation ; autocatalytic cure rate expression

The cure kinetics of CTBN-modified epoxy system

Abstract

Keywords

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