Abstract
The objective of this study is to develop a systematic method to determine molecular weight and its distribution of flexible chain polymer by birefringence experiments. Using the random walk model, birefringence δn and orientation angle ξ have been optically obtained as functions of molecular weights. To confirm the theory, polystyrene solutions with different molecular weights dissolved in polychlorinated biphenyl were experimented by the phase-modulated flow birefringence (PMFB) method. Birefringence of polystyrene solutions is proportional to (Σc i M 1.6 i )γ2, and cot(2χ) to (Σc i M 1.6 i /B1Σc i M −0.2 i )γ. The experimental results agreed well with the theoretical predictions proposed in this study.
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Oh, Y.R., Kwon, M.H. & Park, O.O. Determination of molecular weight and its distribution of flexible chain polymer by phase-modulated flow birefringence technique. Korean J. Chem. Eng. 19, 331–336 (2002). https://doi.org/10.1007/BF02698424
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DOI: https://doi.org/10.1007/BF02698424