Authors:Sarfaraz Alam, L. D. Kandpal and I. K. Varma
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.
Authors:S. Cebulak, A. Matuszewska and A. Langier-Kuźniarowa
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.
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
Authors:Jiang Jinxue, Yang Yonglin, Li Cheng and Li Jianzhang
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
Authors:M. V. Alonso, M. Oliet, J. C. Domínguez, E. Rojo and F. Rodríguez
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
Authors:Blaž Likozar, Romana Cerc Korošec, Ida Poljanšek, Primož Ogorelec and Peter Bukovec
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
Authors:Zoltán Budai, Zsolt Sulyok and Viktória Vargha
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
Authors:J. Saiter, N. Delahaye, M. Liziard and L. Podgorski
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.
Authors:I. Blanco, L. Oliveri, G. Cicala and A. Recca
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
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