NDLI: Time-of-flight ion mobility measurements in epoxy-amine systems during curing

Content Provider	IEEE Xplore Digital Library
Author	Friedrich, K. Ulanski, J. Boiteux, G. Seytre, G.
Copyright Year	1994
Abstract	The technique based on the time-of-flight (TOF) concept was proposed for determination of ion mobility in epoxy resins under isothermal curing conditions. This study extends our earlier investigations on this subject. Ionic conductivity dc measurements also were carried out in order to gain better understanding of the evolution of the ionic conductivity and mobility. The experiments have been performed for selected epoxy-amine systems that gellify and vitrify: diglycidyl ether of bisphenol A (DGEBA) with 4,4'-methylenebis [3-chloro-2,6-diethylaniline] (MCDEA) and for reacting medium that gellify only: diglycidyl ether of 1,4-butanediol (DGEBD) with 4,9-dioxa-1,12-dodecane diamine (4D). The differences found between the time dependency of the ionic conductivity and mobility during curing are explained by the decrease of the concentration of ionic charge carriers during the reaction. We conclude that the decrease of the ionic charge carrier density during the reaction, limits the applicability of the basic assumption of electrical techniques for reaction monitoring, that the ionic conductivity is related directly to the medium viscosity.
Sponsorship	National Natural Science Foundation of China (NSFC) Region Centre Ville de Tours Conseil General D'Indre et Loire ABB IEEE Sandia National Laboratories TOSHIBA
Starting Page	572
Ending Page	576
Page Count	5
File Size	437514
File Format	PDF
ISSN	10709878
Volume Number	8
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Curing Epoxy resins Isothermal processes Conductivity measurement Gain measurement Vitrification Charge carriers Charge carrier density Monitoring Viscosity
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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