Published 1987 | Version v1
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Formation mechanism of poly (p-oxybenzoyl) whiskers

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Description

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

Availability note (English)

MF available from INIS under the Report Number; Available from NTIS, PC A03/MF A01; 1 as DE89001772.

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Publishing Information

Imprint Pagination
12 p.
Report number
LA-tr--88-19

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
20015243
Subject category
S36: MATERIALS SCIENCE; S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Translation
Descriptors DEI
BENZOIC ACID; CRYSTALLIZATION; CRYSTALS; KINETICS; MICROSTRUCTURE; MORPHOLOGICAL CHANGES; ORGANIC COMPOUNDS; POLYMERIZATION; POLYMERS; SCANNING ELECTRON MICROSCOPY; SOLVENTS; TEMPERATURE DEPENDENCE; TRANSMISSION ELECTRON MICROSCO; WHISKERS
Descriptors DEC
CARBOXYLIC ACIDS; CHEMICAL REACTIONS; CRYSTAL STRUCTURE; ELECTRON MICROSCOPY; MICROSCOPY; MONOCARBOXYLIC ACIDS; MONOCRYSTALS; ORGANIC ACIDS; PHASE TRANSFORMATIONS

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