| 高分子混合物溶液在极稀浓度区的粘度异常行为 |
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| 引用本文： | 潘雁,程镕时.高分子混合物溶液在极稀浓度区的粘度异常行为[J].高分子学报,2000(4). |
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| 作者姓名： | 潘雁 程镕时 |
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| 基金项目： | 国家攀登计划，高等学校博士学科点专项科研项目 |
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| 摘 要： | 上世纪50年代初人们就发现,高分子溶液的粘度在极稀浓度区往往表现出异常行为,即当浓度低于某一特定值后,比浓增比粘度-浓度图偏离预计的线性关系,出现上弯或下弯的曲线.
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| 关 键 词： | 高分子混合物 粘度 界面作用 |
THE VISCOSITY ANOMALY OF POLYMER MIXTURE SOLUTION IN EXTREMELY DILUTE CONCENTRATION REGION |
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| PAN Yan,CHENG Rongshi.THE VISCOSITY ANOMALY OF POLYMER MIXTURE SOLUTION IN EXTREMELY DILUTE CONCENTRATION REGION[J].Acta Polymerica Sinica,2000(4). |
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| Authors: | PAN Yan CHENG Rongshi |
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| Abstract: | The measured reduced viscosity\|concentration ( η \-\{sp\}/ c\|c ) curves of miscible PPO/PS、 immiscible PMMA/PS mixtures with different composition in toluene all deviate from linear and reveal downward turn in extremely dilute concentration region. Moreover, in the extremely dilute concentration region, the η \-\{sp\}/ c\|c curve of immiscible PVC/PS mixture solution shows upward turn in THF, while shows downward turn in DCE. These experimental facts indicate that such viscosity anomaly is not dependent of miscibility, but resulted from wall effects. Regarding the polymer mixture as a single solute, the interference of wall effects on viscosity measurement could be eliminated quantitatively with a proposed theoretical formula. After corrected, the true viscosity data of mixture shows normal linear η\-\{s p\}/ c\|c curve in the dilute and extremely dilute concentration region. |
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| Keywords: | Polymer blend Solution viscosity Wall effect |
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