โ Scribed by J.M Chalmers; M.W. Mackenzie; H.A. Willis; H.G.M. Edwards; J.S. Lees; D.A. Long
No coin nor oath required. For personal study only.
The results of dynamic stressing experiments on isotactic polypropylene film samples with draw ratios Q) of 5 and 11.7 on the vibrational spectra are measured using FTIR spectroscopy up to a maximum applied stress of 29 kg mm-'. The effects of stressing on the vibrational band wavenumbers are compared with results of previous work and it is concluded that both C-C skeletal backbone stretching and helical uncoiling are involved in the mechanism of stressing at the molecular level.
๐ SIMILAR VOLUMES
The melt crystallization process of isotactic polystyrene ( i-PS) was studied by means of in situ Fourier transform infrared (FTIR) spectroscopy, with a focus on the conformational changes during the induction period. The spectra obtained during the induction period suggested the occurrence of some