| 高分子稀溶液粘度方程中Huggins系数的新解释 |
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| 引用本文： | 潘雁,程时.高分子稀溶液粘度方程中Huggins系数的新解释[J].高等学校化学学报,2000,21(9):1497-1499. |
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| 作者姓名： | 潘雁 程时 |
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| 作者单位： | 华南理工大学材料学院,高分子研究所,广州,510641 |
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| 基金项目： | 国家攀登计划! (批准号 :596730 2 5)资助 |
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| 摘 要： | 高分子稀溶液的粘度常用 Huggins方程 1] 描述 ,即ηsp/ c=η] +k Hη] 2 c ( 1 )式中的系数 k H(称为 Huggins系数或斜率常数 )通常认为是一个表征高分子在溶液中的流体力学和热力学相互作用的无量纲数值因子 ,应是一个和分子量无关的常数 .但是早在 50年代初就已发现 ,高分Fig. 1 Variation of k H with intrinsic viscosity forpolystyrene in toluene or benzene at2 5℃The line is calculated from eq.( 9) with A=5.54andB=0 .0 535for PS in toluene.● PS in benzene;△ oligomeric PS in benzene; PS in toluene;× …
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| 关 键 词： | Huggins系数 团簇理论 高分子稀溶液 粘度方程 |
A New Interpretation of Huggins Coefficient in the Viscosity Equation for Polymer Dilute Solution |
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| PAN Yan,CHENG Rong-Shi.A New Interpretation of Huggins Coefficient in the Viscosity Equation for Polymer Dilute Solution[J].Chemical Research In Chinese Universities,2000,21(9):1497-1499. |
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| Authors: | PAN Yan CHENG Rong-Shi |
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| Abstract: | The chain length dependency of molar association constant K_a of polymer in solution was investigated theoretically. K_a is proportional to the effective hydrodynamic volume V_ eff of polymer chain in solution. V_ eff is the product of a shape factor and hydrodynamic volume. On the basis of these results, the observed enhancement of Huggins coefficient for short chain and branched polymer could be satisfactorily interpreted. |
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| Keywords: | Huggins coefficient Cluster theory Interaction |
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