Fractions of predominantly isotactic polypropylene with varying stereoregularity were examined by NMR analysis and by hot‐stage optical microscopy, and the stereochemical composition and the melting point of each fraction were determined. From the stereochemical composition the average length of the isotactic stereoblocks is evaluated, and the experimental results are compared to the lengths calculated according to two statistical models of stereospecific propagation. The experimental melting points are then related to the experimental average lengths of isotactic stereoblocks, and the correlation is discussed.
No takes yet. Share an insight, caveat, or question.
Pavan et al. (1977) studied this question.
Synapse has enriched 3 closely related papers on similar clinical questions. Consider them for comparative context: