Polymers: Synthesis and Characterization of Extremely High-Molecular-Weight Polystyrene

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Science  02 Jun 1972:
Vol. 176, Issue 4038, pp. 1041-1043
DOI: 10.1126/science.176.4038.1041


Polystyrenes with molecular weights up to 44 x 106 grams per mole have been characterized by light-scattering and equilibrium ultracentrifugation methods. The Mark-Houwink equation, which relates the molecular weight and the intrinsic viscosity of flexible polymers, can be used only if the measurements are made in a theta solvent at the theta temperature.