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