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In polymer science Flory–Rehner equation is an equation that describes the mixing of polymer and liquid molecules as predicted by the equilibrium swelling theory of Flory and Rehner. It describes the equilibrium swelling of a lightly crosslinked polymer in terms of crosslink density and the quality of the solvent. The theory considers forces arising from three sources: # The entropy change caused by mixing of polymer and solvent. # The entropy change caused by reduction in numbers of possible chain conformations via swelling. # The heat of mixing of polymer and solvent, which may be positive, negative, or zero. The equation is written as — : where, is the volume fraction of polymer in the swollen mass, the molar volume of the solvent, is the number of network chain segments bounded on both ends by crosslinks, and is the Flory solvent-polymer interaction term.〔 In its full form, the equation is written as — : where, is the specific volume of the polymer, is the primary molecular mass, and is the average molecular mass between crosslinks or the network parameter.〔 ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Flory–Rehner equation」の詳細全文を読む スポンサード リンク
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