Abstract
Publisher Summary Considerable interest is displayed today in the comparison between the behavior in solution of isotactic and atactic polymers of the same monomer. It clarifies the influence of the variation of steric structure on the macromolecular configuration and, consequently, on all related properties. Conversely, it enables the determination of whether the properties in solution may reveal differences in the steric composition of stereoisomeric polymers. With the accuracy of the methods employed, the relation between intrinsic viscosity and osmotic molecular weight for fractions of the two types of polystyrene does not practically depend on the variation of steric structure. In the case of the polypropylene, there must be no considerable difference in the viscometric behavior of isotactic and atactic polymers in solution. This chapter illustrates the relationship between intrinsic viscosity and molecular weight for polypropylene in decalin.
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