| 树状高分子溶液在粘度计毛细管表面的吸附现象 |
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| 引用本文： | 徐敏,严晓虎,程时,余学海. 树状高分子溶液在粘度计毛细管表面的吸附现象[J]. 高分子学报, 2001, 38(4): 476-479 |
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| 作者姓名： | 徐敏 严晓虎 程时 余学海 |
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| 作者单位： | 南京大学化学化工学院高分子系, |
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| 摘 要： | 本文测定了树状高分子DAB(PA) n 水溶液和脂肪族超支化聚酯及其硅烷化衍生物溶液性质 .通过粘度测量 ,得到了吸附常数k ,半数吸附浓度ca,分子间缔合常数Km ,特性粘度 [η]等参数 ,解释了特性粘度的反常行为 ,重点研究了吸附现象 .发现树状高分子和超支化高分子溶液在粘度计毛细管表面形成了多层吸附 ,高分子之间的相互作用及高分子与溶剂分子间的氢键作用是形成多层吸附的重要原因
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| 关 键 词： | 树状高分子 超支化高分子 特性粘度 多层吸附 |
| 修稿时间： | 2000-09-09 |
ADSORPTION OF SOLUTIONS OF DENDRITIC MACROMOLECULES ON THE SURFACE OF VISCOMETER CAPILLARY |
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| XU Min,YAN Xiaohu,CHENG Rongshi,YU Xuehai. ADSORPTION OF SOLUTIONS OF DENDRITIC MACROMOLECULES ON THE SURFACE OF VISCOMETER CAPILLARY[J]. Acta Polymerica Sinica, 2001, 38(4): 476-479 |
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| Authors: | XU Min YAN Xiaohu CHENG Rongshi YU Xuehai |
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| Abstract: | Solution properties of dendrimer DAB(PA) n and hyperbranched polyester were studied by measuring viscosity parameters.The adsorption constant k , critical concentration c a, intrinsic viscosity [ η ] and intermolecular association K m were calculated.The unique behavior of intrinsic viscosity observed for the samples was explained preliminarily.The adsorption phenomenon of polymer solution is general, and the adsorption theory is also fitted for dendritic macromolecules.Multilayer adsorption was obtained in dendrimer and hyperbranched polymer solutions.The intermolecular force between macromolecules and solvent molecules (such as hydrogen bonds) is the important factor affecting the adsorption layer thickness. |
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| Keywords: | Dendrimer Hyperbranched polymer Intrinsic viscosity Multilayer adsorption |
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