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  • 學位論文

塊狀共聚合物在兩個溶劑效應下之結構衍變及層狀結構尺寸分析

Phase Behavior and Lamellar Structural Size of a Block Copolymer in the Presence of Two Solvents

指導教授 : 黃慶怡

摘要


本研究是運用自洽平均場理論(Self-Consistent Mean-Field Theory, SCMFT)計算法來探討兩溶劑添加對A/B塊狀共聚物微結構及層狀結構的尺寸如何受到溶劑的比例與溶劑的不互容性之影響。我們將塊狀共聚合物加入一中性溶劑和一選擇性的溶劑所組成的系統。改變溶劑間不互容性,我們可以觀察到高分子微結構衍變為各種型態,包含了層狀結構、柱狀六方堆積及球狀體心立方堆積。然而當溶劑間不互容性強,在低共聚合物體積分率的條件下,原本為無序結構的區域,將會有相分離現象及有序結構的產生,包含了層狀結構、柱狀六方堆積及球狀體心立方堆積。在此部分我們運用分散粒子動力計算法來加以驗證。在層狀結構尺寸分析方面,我們發現在溶劑間不互容性較弱時,尺寸是隨著共聚合物體積分率的遞減而減短。然而在溶劑間不互容性較強時,尺寸一樣是隨著共聚合物體積分率的遞減而減短。但是在靠近兩相分離區時,反而呈現增長的趨勢。

並列摘要


We employ both self-consistent mean-field (SCMF) theory and dissipative particle dynamics (DPD) to study the phase behavior and analyze the microstructural size for a block copolymer in the presence of two solvents. In particular, the effects and the ratio between these two solvents, and copolymer volume fraction are examined. We observe that with increasing the incompatibility between the solvents, various ordered microstructures and/or two macrophase separations are expected. In further, the microstrutural size increases significantly when the systems approach the 2-phase region.

並列關鍵字

SCMFT DPD

參考文獻


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被引用紀錄


鄢立傑(2010)。耗散粒子動力學模擬帶支鏈官能基團高分子與線性高分子共混系統之相態衍變〔碩士論文,國立清華大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0016-1901201111395047
吳穎婷(2011)。耗散粒子動力學模擬具有剛性鏈段之三嵌段共聚物與線性高分子共混系統之相態衍變〔碩士論文,國立清華大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0016-1908201112574854

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