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The paper describes the co-curing studies of ethynyl and ethenyl end-capped imide resins. The effect of composition and chemical structure of ethenyl end-capped resins (nadicimides) on thermal behavior of ethynyl end-capped resins was evaluated using DSC and thermogravimetric analysis. An increase in char yield was observed on co-curing of few resin formulations. A mechanism has been proposed to account for this observation.

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Abstract  

The paper presents the applicability of oxyreactive thermal analysis (OTA) for the investigation of different kinds of resins both natural (recent and fossil) and synthetic. For comparative reasons and a more precise interpretation, along with OTA infrared spectroscopy was used as a method commonly applied for the investigation of fossil resins. The results obtained prove that the OTA method may be very useful for diversification of different kinds of resins. The parameter most valuable for the preliminary characteristics of resins and the evaluation of their transformation was found to be the mass loss recorded on TG curves in three definite temperature ranges.

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Journal of Thermal Analysis and Calorimetry
Authors: Suzana Samaržija-Jovanović, Vojislav Jovanović, Sandra Konstantinović, Gordana Marković and Milena Marinović-Cincović

Introduction Urea–formaldehyde resins are the most important type of the so-called amino plastic resins. Amino resins are often used to modify properties of other materials. These resins are added during the processing of

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of FR chemicals in the process of panel manufacture. The first relates to the interference of treatment chemicals with resin curing and bond development. This interference seems to either inhibit or alter the chemical mechanism required for the

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Journal of Thermal Analysis and Calorimetry
Authors: M. V. Alonso, M. Oliet, J. C. Domínguez, E. Rojo and F. Rodríguez

Introduction The manufacturing process of phenol–formaldehyde (PF) resins has remained unchanged for several decades. However, numerous efforts have been carried out to reduce the dependence of this industry on phenol, the cost

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Journal of Thermal Analysis and Calorimetry
Authors: Blaž Likozar, Romana Cerc Korošec, Ida Poljanšek, Primož Ogorelec and Peter Bukovec

Introduction Melamine–formaldehyde (MF) and melamine–urea–formaldehyde (MUF) resins are some of the most widely used adhesives for exterior and semi-exterior wood panels and for the preparation and bonding of low- and high

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Introduction Composites and their characterisation In spite of the fact that glass-fibre reinforced composite materials based on unsaturated polyester resins have been used for very long time [ 1 ] their

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Alkyd-based-thermosetting resin

Calorimetric investigations of the curing process

Journal of Thermal Analysis and Calorimetry
Authors: J. Saiter, N. Delahaye, M. Liziard and L. Podgorski

Abstract  

In this work, the rate of cure of different oxidative drying oil modified alkyd resins are investigated by DSC measurements. We determine, from the Kissinger equation, the apparent activation energy of the curing process. We show that this activation energy depends on the curing duration and that these variations lead to the determination of a time constant, characteristic of the material.

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Introduction Epoxy resins are an important class of polymeric materials, characterised by the presence of more than one three-membered ring known as the epoxy (“epoxy” is derived from the Greek prefix “ep,” which means over and

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existing in the homogeneous catalytic process, many heterogeneous catalysts have been developed [ 13 – 15 ]. Recently, the anion-exchange resin has been exploited as a promising heterogeneous catalyst for the transesterification reactions [ 16 , 17

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