Accession Number : ADA183247

Title :   Crystallization Relationships Between Poly(bis(phenoxy)phosphazene)-(PBPP) Crystals.

Descriptive Note : Technical rept.,

Corporate Author : PITTSBURGH UNIV PA SCHOOL OF ENGINEERING

Personal Author(s) : Kojima,M ; Magill,J H

PDF Url : ADA183247

Report Date : 15 Jul 1987

Pagination or Media Count : 20

Abstract : Whenever solution grown alpha-form (3-D) crystals of PBPP were heated in the thermotropic region between T(1) and Tm (the isotropic temperature) they convert to the 2D pseudohexagonal, delta-form crystals. Upon rapid quenching into liquid nitrogen the delta form frozen-in still remains upon warming to room temperature. Further heating close to T(1) produces a 3-D hexagonal modification (epsilon-form) which is a morphological modification of the monoclinic alpha-form of PBPP confirmed already by electron diffraction measurements.

Descriptors :   *CRYSTALLIZATION, *PHOSPHAZENE, CRYSTALLIZATION, CRYSTALS, ELECTRON DIFFRACTION, HEATING, ISOTROPISM, LIQUID NITROGEN, MEASUREMENT, MODIFICATION, MORPHOLOGY, QUENCHING, ROOM TEMPERATURE, TEMPERATURE

Subject Categories : Organic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE