Crystal morphology of poly(aryl ether ketone)s containing meta-phenyl links

The crystal morphology of low molecular weight poly(aryl ether ketone)s con taining meta-phenyl links has been investigated by TEM techniques. Results show that there exists a new crystal morphology in the polymer crystallites , that is quadrant angular leaf-like single crystals, the angular degrees b etween the two diagonals of which are 101.9 degrees, which is in good agree ment with the 102.6 degrees obtained from the calculation of unit cell crys tal parameters. The above morphology has directly shown that these kinds of poly(aryl ether ketone)s containing metaphenyl links has its crystal unit cell growing along the (110) crystal face while its spheruletics grow along its crystal b axis.