ポリビニルクラウンエーテルの溶液物性 : IV.ポリビニルベンゾ-15-クラウン-5とポリビニルベンゾ-18-クラウン-6の光散乱

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Light scattering measurement of poly(vinylbenzo-15-crown-5)(PB15C5) and poly(vinyl-benzo-18-crown-6)(PB18C6) was carried out in toluene over the temperature range from 25℃ to 45℃. The weight average molecular weight (M_w) and the second virial coefficient (A_2) were obtained as follows, M_w = 6.8 × 10^4, A_2 = 0.36 ×10^<-4> for PB15C5 and Mw = 5.9 × 10^4, A_2= 1.68 × 10^<-4> for PB18C6. The results of A_2 indicate that solvent power of toluene is not same for both polymers, and that it is low for PB15C5. The unperturbed values of the root mean square radius of gyration <S^2_0>^<1/2>, which corrected the excluded volume effect, were 57.7 Å for PB15C5 and 59.1 Å for PB18C6 at 25℃. The temperature dependence of <S^2_0>^<1/2> for PB15C5 was negative a little, though <S^2_0>^<1/2> of PB18C6 showed the considerably large and positive temperature change.
東京女子大学の論文
2003-03-10