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Curing reactions in plastic prepolymers and propellants. I. Polystyrene

Kishore, K and Pai, Verneker VR (1979) Curing reactions in plastic prepolymers and propellants. I. Polystyrene. In: Journal of Applied Polymer Science, 24 (7). pp. 1603-1608.

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Curing reactions of the viscous PS prepolymer and PS/AP propellant slurry have been studied. The molecular weight of the binder (separated from the propellant) and the prepolymer was found to increase to a maximum value, remain constant for some time, and then fall off between 50–125°C. The molecular weight of the binder was found to be less than corresponding prepolymer between 100–150°C but at lower temperatures (50–75°C) the reverse was found to be true. The increase in the molecular weight during curing at lower temperatures has been explained on the basis of Trommsdorff effect which gets support from the estimated activation energy (9 kcal mole−1) for the curing process. Curing was recognized as chain extension where the rate of polymerization becomes diffusion controlled below 75° C.

Item Type: Journal Article
Publication: Journal of Applied Polymer Science
Publisher: John Wiley and Sons
Additional Information: Copyright of this article belongs to John Wiley and Sons.
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 15 Dec 2010 05:18
Last Modified: 15 Dec 2010 05:18
URI: http://eprints.iisc.ac.in/id/eprint/34483

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