The degree of polymerization is very high. Molecular weights estimated by various methods, such as sedimentation, dialysis, end-group titration, viscosity, and pH titration, can vary from 500,000 to several million.
For a given compound, the values so obtained are mainly dependent on the thermal history of the specimen and on its stoichiometry. A very small departure from the theoretical O/P ratio of 3 can induce large variations in the degree of polymerization.
KeywordsCrystal Data Atomic Arrangement Crystal Structure Determination Potassium Atom Chemical Preparation
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