Abstract
AbstractCriteria for establishing a universal GPC calibration for poly‐1,2‐butadiene on the basis of polystyrene standards are considered. The number‐average molecular weights of the two polymers are related by a linear expression on the assumption that their respective Mark‐Houwink exponents are equal. The coefficient Cn of this expression, determined from GPC and viscosity measurements, remained constant for a considerable range of molecular weights and polydispersities. The applicability of Cn beyond the interval of present measurements is considered on the basis of results in the literature. The results are comparable to those obtained from a universal calibration based on the unperturbed dimension of polymer chains, but do not agree with those obtained from a model based on extended length.
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