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A series of monodispersed polydimenthylsiloxanes (PDMS) with molecular weights from 3K to 156K were synthesized. The intrinsic viscosity and absolute molecular weight of each monodispersed PDMS was measured and the Mark‐Houwink equation for the PDMS series in toluene at 25°C was derived: [eta;]=2.88 × 10−4 M0.613. It was proven that the accurate molecular weight determination of polysiloxanes is not possible using polystyrene (PS) standards. It can be achieved either by using a gel permeation chromatographic method with PDMS standards or by a calculation from the Mark‐Houwink equation using experimental values of intrinsic viscosity.
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Yang et al. (1988) studied this question.
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