The spherulite growth rate is independent of melt temperature and depends on crystallization temperature. Chain polarizability was also calculated using refined atomic coordinates and the bond polarizabilities. PEEK crystals were more stable in the electron beam, by about an order of magnitude, than polyethylene. For these samples, shifts were observed in the peak position of the main amorphous halo, which was found to have good correlation with the macroscopic density. Computer interfacing of the dynamic birefringence apparatus and the data treatment using Fourier analysis are reported in this paper.
Birefringence is measured using the optical transmission technique.
An AIM-65 microcomputer was interfaced with this apparatus for the purposes of data aquisition and data analysis. These studies were made on a computerized dynamic refringence apparatus. A comparison of the dynamic birefringence and dynamic mechanical properties in the rubber-modified copolymer reveals a rubber glass transition peak, which is much more pronounced in dynamic birefringence data than in dynamic mechanical data. Before the main transition there is a shoulder in the mechanical and optical loss curves. The reasons for the occurrence of the shoulder are discussed.