On the morphology and structure of J-1 polymer, poly[(bis-4,4′-dicyclohexyl-methane) n-dodecanediamide], spherulites

Abstract

Six different kinds of spherulites of du Pont's J-1 polymer, poly[(bis-4,4′-dicyclohexylmethane) n-dodecanediamide], were grown from an m-cresol solution during isothermal solvent evaporation. Polarizing microscopy shows different extinction patterns and interference colours in the spherulites. Electron diffraction indicates that three orthorhombic crystalline modifications with different a parameters exist in the single crystals and spherulites of J-1 polymer grown from solution. Electron microscopy and electron diffraction show that the variations in appearance of the spherulites are due to variations in the crystalline modifications and the crystallographic indices and morphology of the radiating crystalline entities.