Premium
Kinetic and rheological relationships of dicyanate ester polycondensation for the resin transfer molding process
Author(s) -
Texier C.,
Taha M.,
Maazouz A.,
Pascault J. P.
Publication year - 1997
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.11768
Subject(s) - vitrification , materials science , rheology , curing (chemistry) , kinetics , glass transition , polymer chemistry , condensation polymer , dynamic mechanical analysis , chemical engineering , thermodynamics , composite material , polymer , medicine , physics , quantum mechanics , engineering , andrology
Kinetic and rheological behavior of a liquid dicyanate ester catalyzed by a copper salt was studied with a view to controlling the RTM process. The kinetics are satisfactorily modeled with a simple second order model until vitrification occurs. Independent of the catalyst concentration, the relationship between glass transition temperature T g and conversion x was well validated, indicating that vitrification occurs well before T g ( x ) reaches the curing temperature. The rheological study allowed gelation (tanδ crossover) and vitrification times at different curing temperatures to be determined. The values of tanδ at gel point were found to be slightly higher than those usually found. In order to carry out a simulation of the RTM process, viscosity and conversion were also linked with an empirical model.