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Addition of a reactive diluent to a catalyzed epoxy-anhydride system. II. effect on enthalpy relaxation

✍ Scribed by P. Cortés; S. Montserrat; J. M. Hutchinson

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
622 KB
Volume
63
Category
Article
ISSN
0021-8995

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✦ Synopsis

Enthalpy relaxation in an epoxy resin based on diglycidyl ether of bisphenol A (DGEBA) with a reactive diluent cured with methyl-tetrahydrophthalic anhydride (MTHPA) with an accelerator was investigated by differential scanning calorimetry. The reactive diluent (RD) added was an aliphatic diglycidyl ether which was mixed in a proportion of 50 parts by weight (pbw) per 100 parts of DGEBA, with the stoichiometric quantity of MTHPA.

The key parameters of the enthalpy relaxation investigated were the nonlinearity parameter, x, the apparent activation energy, Ah*, and the nonexponentiality parameter, (3.The results were compared with other data obtained previously in similar epoxy -anhydride systems without an RD but with different degrees of conversion in order to analyze the effects of (a) the introduction of aliphatic chains of the RD in the epoxy structure and (b) a reduction in the crosslink density of the resin. C)

📜 SIMILAR VOLUMES

Addition of a reactive diluent to a cata
Addition of a reactive diluent to a catalyzed epoxy-anhydride system. I. Influence on the cure kinetics
✍ S. Montserrat; G. Andreu; P. Cortés; Y. Calventus; P. Colomer; J. M. Hutchinson; 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English

The effect of a reactive diluent (RD) on the kinetics of the curing of an epoxy resin, based on diglycidyl ether of bisphenol A (DGEBA), with a carboxylic anhydride derived from methyl-tetrahydrophthalic anhydride (MTHPA) catalyzed by a tertiary arnine has been studied. The reactive diluent was a lo