✦ LIBER ✦

Addition polyimides. I. Kinetics of cure reaction and thermal decomposition of bismaleimides

✍ Scribed by K. N. Ninan; K. Krishnan; Jainamma Mathew

Publisher: John Wiley and Sons
Year: 1986
Tongue: English
Weight: 470 KB
Volume: 32
Category: Article
ISSN: 0021-8995
DOI: 10.1002/app.1986.070320731

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✦ Synopsis

Synopsis

The thermal polymerization of four structurally different bismaleimide resins, prepared by reacting maleic anhydride with four aromatic diamines, viz., 4,4'-diaminodiphenyl methane, 4,4'-diamino diphenyl ether, 4,4'-diamino diphenyl sulfone, and 3,3'-diamino diphenyl sulfone, was followed by differential scanning calorimetry (DSC). The enthalpy change and the kinetic constants for the polymerization reactions were evaluated from the DSC curves. Thermal stability of the cured polymers was studied by therrnogravimetry (TG). The kinetic parameters, viz., activation energy E and preexponential factor A, for the thermal decomposition of the cured bismaleimides were calculated from the TG curves using three nonmechanistic integral equations.

The kinetic constants ( E and A) follow a trend similar to the thermal stability of the polymers.

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