Industrial Applications

For this chapter only two topics are selected, viz molecular orientation in stretched amorphous samples and the birefringence patterns in injection moulded strips of amorphous polymers. No reference is made to typical hydrodynamic problems like the interpretation of birefringence distributions in non-uniform flow fields as occurring in the entrance region of capillaries etc. The reason for this omission is that the present author does not feel competent in solving these problems with the aid of adequate constitutive equations. Beautiful qualitative pictures are found in Chang D. Han’s book1) and in the papers by Teikichi Arai and coworkers?2).