Über die Einkristalle von Polyparaxylylen

Abstract

Poly-p-xylylene crystallizes from some solvents into two single crystal forms, rectangular and hexagonal. These two single crystals show different X-ray and electron diffraction patterns, respectively. By X-ray measurements it was found that these two single crystals correspond to α- und β-crystal forms, which were observed with bulk materials by Brown and Farthing. It was also found that these morphological forms depend on the crystallization-conditions, especially on crystallization-solvents. The annealing effects and the transformation from α- to β-form were studied by X-ray diffraction and differential thermal analysis. © 1968 Dr. Dietrich Steinkopff Verlag.