Characterization of branched polymers

摘要

Most long-chain-branched polymers occurring in practice are formed by processes statistical in nature and this results in substances highly non-uniform in molecular weight, number of branch points per molecule, and in the architecture of molecules with a particular number of branch points. The most reliable information on the degree of branching is obtained by determining the weight-average molecular weight, by light scattering, and the intrinsic viscosity, and by comparing the intrinsic viscosity with that of a linear polymer with the same weight-average molecular weight. If an appropriate model exists for the particular polymer, its more detailed description may be possible.