Copolyesters having secondary and tertiary amine salt groups in the main and side chains are prepared by chemoselective polymerization. These copolyesters are soluble in a 10% aqueous solution of poly(vinyl alcohol) ...Copolyesters having secondary and tertiary amine salt groups in the main and side chains are prepared by chemoselective polymerization. These copolyesters are soluble in a 10% aqueous solution of poly(vinyl alcohol) (PVA) at 90 degree C and act as plasticizer in the blend films cast from the solution. Only a glass transition temperature is observed for all these blends indicating the formation of compatible blends from these polyesters with PVA. These blends exhibit manifold characteristics such as ionic conductivity, complex formation with metal ions, absorption of moisture and color changes. The electric conductivity of the copolyesters and blends is in the range of 10** minus **6 Scm** minus **1. The blends with PVA forms complexes with Cu**2** plus and Co**2** plus . The coordination structure with two chelate rings is suggested for these polymer blend/metal complexes. (Author abstract) 10 Refs.展开更多
文摘Copolyesters having secondary and tertiary amine salt groups in the main and side chains are prepared by chemoselective polymerization. These copolyesters are soluble in a 10% aqueous solution of poly(vinyl alcohol) (PVA) at 90 degree C and act as plasticizer in the blend films cast from the solution. Only a glass transition temperature is observed for all these blends indicating the formation of compatible blends from these polyesters with PVA. These blends exhibit manifold characteristics such as ionic conductivity, complex formation with metal ions, absorption of moisture and color changes. The electric conductivity of the copolyesters and blends is in the range of 10** minus **6 Scm** minus **1. The blends with PVA forms complexes with Cu**2** plus and Co**2** plus . The coordination structure with two chelate rings is suggested for these polymer blend/metal complexes. (Author abstract) 10 Refs.
文摘以对二氯苄(XDC)和十二烷基二甲基叔胺为原料,合成了阳离子双子表面活性剂N,N'-对苯二亚甲基-双(十二烷基二甲基氯化铵)(XBDDMA)。产物结构经红外光谱(FT-IR)、核磁共振氢谱(~1H NMR)和碳谱(^(13)C NMR)进行了确认。研究了XBDDMA与脂肪醇聚氧乙烯(9)醚(AEO_9)按不同摩尔比复配所得体系的临界胶束浓度(cmc)、平衡表面张力(γ_(cmc))及动态表面张力。结果表明,当n(XBDDMA)∶n(AEO_9)=1∶9~9∶1时,随XBDDMA含量增加,复配体系的cmc先降低后升高,表面活性剂分子在表面上的极限占有面积(A_(min))持续降低,当n(XBDDMA)∶n(AEO_9)=1∶1时复配体系的cmc最小,为2.27×10^(-6)mol/L,γ_(cmc)也最小,为33.06 m N/m;XBDDMA的添加降低了吸附初期的扩散能,从而降低了AEO_9的动态表面活性,二者复配不具有动态表面活性的协同增效作用。
