Formation Mechanism of Poly (P-Oxybenzoyl) Whiskers.

摘要

From electron ray diffraction figures, POB needle shape crystals obtained in the last report were found to be extended chain type crystals with high crystallinity. And the formation mechanism of this whisker was thought to be the following from observing the morphology of initial stages of polymerization. Oligomer molecules reaching a certain polymerization degree by condensing in a solvent, precipitate as lamellae crystals. Moreover, the oligomer molecules crystallize in spiral growth due to the screw dislocation occurring on the lamellae crystal, and the lamellae piles up high. After that, post polymerization occur and the oligomer molecules between lamellaes condense and become extended chain type crystals. Also, by the polymerization conditions of solvents used, other morphologies are observed, but basically, it was similar polymerized crystallization mechanism. 5 refs., 7 figs. (ERA citation 14:001160)