Rheological study of the isothermal reticulation of an epoxy resin | Zendy

Harran Daniel | Zendy; Laudouard Annie | Zendy

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Rheological study of the isothermal reticulation of an epoxy resin

Author(s) -

Harran Daniel,

Laudouard Annie

Publication year - 1986

Publication title -

journal of applied polymer science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.575

H-Index - 166

eISSN - 1097-4628

pISSN - 0021-8995

DOI - 10.1002/app.1986.070320732

Subject(s) - shearing (physics) , vitrification , materials science , epoxy , isothermal process , rheology , composite material , reaction rate constant , modulus , growth rate , hardening (computing) , kinetics , thermodynamics , polymer chemistry , medicine , physics , geometry , mathematics , layer (electronics) , andrology , quantum mechanics

The complex modulus of shearing G * = G' + jG ″ was measured during the isothermal hardening of several epoxy resins. The gelation induces a slowing down of the rate of growth of viscous modulus ν ″ = d (log G ″)/ dt between two zones where this rate is constant. This slowing down of growth rate varies with the temperature and is null for T = T C gel : ν ″ 2 − ν ″ 1 = K (1/ T C gel −1/ T ). We have shown that the two phenomena of gelation and vitrification stay perfectly distinct at all temperatures and in particular at T C gel . So the decrease of the rate ν ″ associated with gelation disappears at this temperature without the vitrification being responsible.

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