TY - JOUR
T1 - Catalysis and kinetics of cyclotrimerization of cyanate ester resin systems
AU - Osei‐Owusu, A.
AU - Martin, G. C.
AU - Gotro, J. T.
PY - 1992/4
Y1 - 1992/4
N2 - The kinetics of cyclotrimerization and the thermal stability of bisphenol Abased cyanate ester resin systems were determined using Fourier transform infrared spectroscopy, differential scanning calorimetry, and thermogravimetry. The bisphenol A dicyanate was cured with 4 phr nonylphenol and with the octoates of zinc and manganese, and cobalt acetylacetonate at concentrations ranging from 0 to 750 ppm metal. An empirical rate law was used to predict the cyanate concentration profiles. The observed reaction rate showed a first‐order dependenće on the initial metal concentration and a second‐order dependence on the cyanate concentration in the kinetically controlled regime. For the uncatalyzed systems, the kinetics was described by a second‐order autocatalytic model. The thermal stability of the network was found to be dependent on the catalyst concentration for the zinc catalysts. For the samples cured with manganese, no effect of concentration on the thermal stability was observed.
AB - The kinetics of cyclotrimerization and the thermal stability of bisphenol Abased cyanate ester resin systems were determined using Fourier transform infrared spectroscopy, differential scanning calorimetry, and thermogravimetry. The bisphenol A dicyanate was cured with 4 phr nonylphenol and with the octoates of zinc and manganese, and cobalt acetylacetonate at concentrations ranging from 0 to 750 ppm metal. An empirical rate law was used to predict the cyanate concentration profiles. The observed reaction rate showed a first‐order dependenće on the initial metal concentration and a second‐order dependence on the cyanate concentration in the kinetically controlled regime. For the uncatalyzed systems, the kinetics was described by a second‐order autocatalytic model. The thermal stability of the network was found to be dependent on the catalyst concentration for the zinc catalysts. For the samples cured with manganese, no effect of concentration on the thermal stability was observed.
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U2 - 10.1002/pen.760320805
DO - 10.1002/pen.760320805
M3 - Article
AN - SCOPUS:84989093347
SN - 0032-3888
VL - 32
SP - 535
EP - 541
JO - Polymer Engineering & Science
JF - Polymer Engineering & Science
IS - 8
ER -