高等学校化学学报

高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (10): 1323.

• 论文 • 上一篇    下一篇

丙烯酰胺-二氰二胺大单体及其与苯乙烯共聚物的研究(Ⅱ)——共聚物与甲基橙及其同系物的相互作用

臧庆达, 李卓美   

  1. 中山大学高分子研究所, 广州, 510275
  • 收稿日期:1991-11-04 修回日期:1991-04-14 出版日期:1992-10-24 发布日期:1992-10-24
  • 通讯作者: 臧庆达
  • 基金资助:

    高等学校博±点专项科研基金

Studies on Acrylamide-Dicyanodiamide Maeromer and Its Copolymer with Styrene(Ⅱ)——The Interactions of Copolymer with Methyl Orange and Its Homologue

ZANG Qing-Da, LI Zhuo-Mei   

  1. Institute of Polymer Science, Zhongshan University, Guangzhou, 510275
  • Received:1991-11-04 Revised:1991-04-14 Online:1992-10-24 Published:1992-10-24

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摘要： 用平衡渗析法研究了主链含疏水基、侧链含亲水基的接枝共聚物P-M-St和二氰二胺同甲醛、氧化铵的缩合物D-F与甲基橙MO及乙基橙EO,橙黄ⅣO-Ⅳ相互作用的热力学.由Klotz方程求得键合常数K1和△G、△H和△S.D-F与P-M-St相比,其与MO的键合作用较弱.P-M-St与染料的键合程度:O-Ⅳ>EO>MO.脲或甲醇能削弱高聚物与染料的相互作用.

关键词: 两亲高分子, 甲基橙, 平衡渗析, 热力学, 键合

Abstract: The binding of amphiphilic copolymer P-M-St which consists of hydrophobic groups aiongs the mam chain and hydrophilic groups along the graft side chain and the condensation polymer of dicyanodiamide and formaldehyde D-Fwith methyl orange (MO) as well as the binding of P-M-St with MOhomologue ethyl orange (EO) and orange-W (Q-IV ) were studied thermodynamically by the method of equilibrium dialysis at 25,35,45℃ and 55℃.The equilibrium constant K1 and △H,△S,△G were obtained.It has been found that the binding ability of P-M-St is stronger than that of D-Fsince the former contains hydrophobic groups.The binding ability of dyes with P-M-St is in the order; O-IV>EO>MO,i.e.,the larger the hydrophobic group in dyes,the stronger is the binding ability.When urea or methanol is added,the hydro-phobic interaction of copolymer and dyes is destroyed,resulting in weakening the polymer-dye binding.After dyes interact with polymers,the λmax shifts to ultraviolet region.The stronger the hydrophobicity of environments in which dyes lie,the greater the displacement.

Key words: Amphiphilic copolymer, Methyl orange, Equilibrium dialysis, Thermodynamics, Binding

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