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Kinetics of aryl phosphinate anhydride curing of epoxy resins using differential scanning calorimetry
Author(s) -
Chen LeoWang,
Fu ShihChi,
Cho ChingSheng
Publication year - 1998
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/(sici)1097-0126(199808)46:4<325::aid-pi33>3.0.co;2-i
Subject(s) - phosphinate , autocatalysis , epoxy , differential scanning calorimetry , succinic anhydride , curing (chemistry) , reaction rate constant , aryl , polymer chemistry , kinetics , materials science , bisphenol a , chemistry , catalysis , thermodynamics , organic chemistry , fire retardant , alkyl , physics , quantum mechanics
The curing reaction of two kinds of epoxy resins, (bisphenol A epoxy DER331, and novolac epoxy DEN438) with aryl phosphinate anhydride (9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide)‐methyl succinic anhydride (DMSA), and benzyldimethylamine (BDMA) as the catalyst, was investigated by differential scanning calorimetry (DSC) using an isothermal approach over the temperature range 130–160°C. The experimental results showing autocatalytic behaviour were compared with the model proposed by Kamal, including two rate constants ( k 1 and k 2 ) and two reaction orders ( m and n ). The model predictions are in good agreement with the experimental data and demonstrate that the autocatalytic model is capable of predicting the curing kinetics of both systems without any additional assumptions. The activation energies for the rate constants of DER331/DMSA and DEN438/DMSA are 77–92 kJmol ‐1 and 83–146 kJmol ‐1 , respectively. The obtained overall reaction order of 2 is in agreement with the reaction mechanism reported by several workers. © 1998 SCI.