| 聚合物体系散射函数的热力学基础 |
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| 引用本文： | 赵得禄,黄昀.聚合物体系散射函数的热力学基础[J].高分子学报,1995,0(3):332-336. |
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| 作者姓名： | 赵得禄 黄昀 |
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| 作者单位： | 中国科学院化学研究所高分子物理实验室，北京大学物理系 |
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| 基金项目： | 国家基础性重大关键项目 |
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| 摘 要： | 利用链段浓度和链头浓度的概念，根据热力学涨落理论，给出了聚合物二元共混体系ｄｅＧｅｎｎｅｓ散射函数的一个普遍的热力学证明，指出了这个函数和Ｆｌｏｒｙ－Ｈｕｇｇｉｎｓ共混自由能公式一样，也依赖于忽略构象涨落的假设．
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| 关 键 词： | 链段浓度，链头浓度，分子浓度，共混体系，散射函数 |
| 收稿时间： | 1994-01-31 |
THERMODYNAMICAL FOUNDATION OF DE GENNES SCATTERING FUNCTION |
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| ZHAO De-lu,HUANG Yun.THERMODYNAMICAL FOUNDATION OF DE GENNES SCATTERING FUNCTION[J].Acta Polymerica Sinica,1995,0(3):332-336. |
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| Authors: | ZHAO De-lu HUANG Yun |
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| Institution: | Institute of Chemistry; Academia Sinica; Beijing 100080; Physic Department; Peking University; Beijing 100871 |
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| Abstract: | he concepts of two concentrations,namely segmental and molecular concentrations for polymer blends has been proposed.The former is equivalent to the ordinary volume fraction and the latter is defined as the number of the chain heads in the unit volume for every polymer component.The entropy part of the Flory-Huggins free energy should be represented by the molecular concentration, and the mixing heat part should be represented by the segmental concentration.The two concentrations will be correlated each other by the conformational function of the said polymer chain. When neglecting the conformational fluctuation and considering only the influence of the molecular concentration fluctuation,the de Gennes scattering function for polymer binary blends has been deduced on the basis of the general thermodynamical fluctuation theory. |
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| Keywords: | Segmental concentration Chainhead concentration Molecular concentration Scattering function Thermodynamical fluctuation |
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