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Dipole moments of copolymers in relation to the distribution of polar monomer unit sequences
Authors:  hal Kü    ü  kyavuz,Bahattin M. Baysal
Affiliation:Zühal Küçükyavuz,Bahattin M. Baysal
Abstract:A method for evaluating the dipole moments of copolymers in relation to the distribution of polar unit sequences is proposed. Experimental data on the synthesis and dipole moments of styrene-p-chlorostyrene and styrene-p-methoxystyrene copolymers were used to calculate the effective dipole moment of a polar unit in a copolymer. For this purpose, we assumed the following effective moment values for the corresponding polar unit sequences along the copolymer chains: when both of the nearest neighbours are polar, μPP, when one of the nearest neighbours is polar and the other is non-polar, μPS, and when both of the nearest neighbours are non-polar, μSS. The relative magnitudes of μSS, μPS and μPP calculated for both copolymers reflect the influence of dipole-dipole interactions on the effective dipole moment of a polar unit in a copolymer molecule.
Keywords:dipole moment   poly(styrene-co-p-chlorostyrene)   poly(styrene-co-p-methoxystyrene)   sequence distribution   nearest neighbour interaction   microstructure
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