ポリビニルクラウンエーテルの分子形態に関する研究

概要

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Poly(vinylbenzo-15-crown-5) (PB15C5) and poly(vinylbenzo-18-crown-6) (PB18C6) were prepared by radical polymerization. Light scattering measurement of PB15C5 and PB18C6 was carried out in toluene over the temperature range from 25℃ to 45℃. The weight average molecular weights (M_w), the radius of gyrations (<S^2>^<1/2>) and the second virial coefficients (A_2) at25℃ were obtained as follows, M_W=11.0×10^4, <S^2>^<1/2>=148Å, A_2 = 0.55×10^<-4> for PB15C5 and M_w=10.0×10^4, <S^2>^<1/2>=83.5Å, A_2=1.08×10^4 for PB18C6. The conformations of PB15C5 and PB18C6 in toluene were discussed on the values of <S^2>/X_w by comparing with those of flexible chain polymer and/or rodlike polymer. It was found that the poly(vinylcrown ether)s behave like a semiflexible chain in toluene.
東京女子大学の論文
2005-03-11