Method for determination of the ratio of rate constants, secondary to primary amine, in epoxy-amine systems

In epoxy-amine kinetic studies, the determination of the ratio of rate constants, ( R) for hydrogens on primary and secondary amine groups is very important; in fact R is related to the network morphology. In this paper we show that R can be directly calculated from the ratio of the concentrations o...

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Bibliographic Details
Published inPolymer (Guilford) Vol. 38; no. 12; pp. 3117 - 3120
Main Authors Paz-Abuin, Senen, Lopez-Quintela, Arturo, Varela, Montse, Pazos-Pellin, Mercedes, Prendes, Pilar
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 01.06.1997
Elsevier
Subjects
Applied sciences
Chemical properties
Exact sciences and technology
infrared spectroscopy
Polymer industry, paints, wood
Properties and testing
reactivity ratio
substitution effect
Technology of polymers
reactivity ratio
substitution effect
infrared spectroscopy
Diamine
Near infrared spectrometry
Curing(plastics)
Epoxy resin
Ratio
Kinetics
Rate constant
Experimental study
Primary amine
Computing method
Secondary amine
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Summary:In epoxy-amine kinetic studies, the determination of the ratio of rate constants, ( R) for hydrogens on primary and secondary amine groups is very important; in fact R is related to the network morphology. In this paper we show that R can be directly calculated from the ratio of the concentrations of primary to secondary amine at (d[A 2]/d t) max, d[A 2]/d t being the reaction rate for the formation of the secondary amine. Experimental measurements were carried out in the near infrared.
ISSN:0032-3861
1873-2291
DOI:10.1016/S0032-3861(96)01093-2