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The effects of fillers on the chemorheology of highly filled epoxy resins: I. Effects on cure transitions and kinetics
Author(s) -
Altmann Nara,
Halley Peter J
Publication year - 2003
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1058
Subject(s) - diglycidyl ether , epoxy , vitrification , kinetics , bisphenol a , materials science , filler (materials) , fourier transform infrared spectroscopy , glass transition , chemical engineering , composite material , polymer chemistry , polymer , medicine , physics , quantum mechanics , andrology , engineering
Abstract This work examines the effects of level of silica filler (at 0, 10, 30, 50 wt%) on the gelation and vitrification of a model silica‐filled diglycidyl ether of bisphenol F (DGEBF)/methylenedianiline (MDA) system. An increased filler level is shown to decrease the gelation and vitrification times at low temperatures (below 80 °C). FTIR cure kinetics show that the reaction rates are increased and the activation energies of gelation are reduced at these temperatures, indicating that network formation is made easier. Entropic and catalytic reasons for this phenomenon are discussed. © 2003 Society of Chemical Industry