Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 76: Issue 1
Time-temperature-transformation analysis of an alkyd-amino resin system
Authors:
V. Vargha Budapest University of Technology and Economics Department of Plastics and Rubber Technology 1111 Budapest Műegyetem rkp. 3. H/1 Hungary E-mail 1111 Budapest Műegyetem rkp. 3. H/1 Hungary E-mail

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Gy. Kiss Budapest University of Technology and Economics Department of Plastics and Rubber Technology 1111 Budapest Műegyetem rkp. 3. H/1 Hungary E-mail 1111 Budapest Műegyetem rkp. 3. H/1 Hungary E-mail

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Pages:
295–306
Online Publication Date:
03 Nov 2004
Publication Date:
01 Apr 2004
Article Category:
Research Article
DOI:
https://doi.org/10.1023/b:jtan.0000027828.81241.78
Keywords:
amino-formaldehyde resins; alkyd resins; isothermal TG; time-temperature-transformation analysis; TTT-diagram; TMA
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Abstract  

The curing of a thermoreactive alkyd-melamine-formaldehyde resin system was investigated by rheologycal, TG and TMA-analysis, in order to construct the time-temperature-transformation diagram. The points of the gelation curve were determined by measuring the increase in viscosity during isothermal curing at different temperatures. A power-function could be fitted to the gelation curve, which is suitable to estimate gelation at any curing conditions, as well as to establish storage conditions. The reaction in the resin matrix was followed by monitoring the loss of mass during isothermal curing at different temperatures. The final section of the resulted iso-curing temperature (iso-Tcure) diagrams could be fitted with logarithmic functions, which may be used for estimating the conditions needed to a given, desirable mass loss, i.e. conversion. The steepness of the curves increases with temperature suggesting the forthcoming of degradation during cure with increasing temperature. From these data the iso-mass loss curves of the TTT-diagram were constructed. For determining the iso-Tg curves of the TTT-diagram isothermal curing was carried out in a drying oven at different temperatures, followed by TMA measurements. The iso-Tcure diagrams served to determine Tg, and to construct the iso-Tg curves of the TTT diagram. Vitrification curve is far beyond conditions of storage, curing and degradation, meaning that the resin matrix is in rubbery physical state before, during and after the cure. Curing conditions resulting degradation can also be estimated from the TTT-diagram.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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