| 引用本文: | 张微微,徐之光,朱梦冰,俞强.嵌段共聚物PEO-b-PS薄膜的微相分离形貌[J].材料科学与工艺,2012,20(4):99-103.DOI:10.11951/j.issn.1005-0299.20120419. |
| ZHANG Wei-wei,XU Zhi-guang,ZHU Meng-bing,YU Qiang.Microphase separation morphologies of PEO-b-PS thin films[J].Materials Science and Technology,2012,20(4):99-103.DOI:10.11951/j.issn.1005-0299.20120419. |
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| 摘要: |
| 为实现对PEO-b-PS薄膜微相分离形貌和纳米结构的调控,通过原子转移自由基聚合制备了不同嵌段结构的PEO-b-PS,使用原子力显微镜研究了嵌段结构及热处理条件对溶液旋涂制备的PEO-b-PS薄膜微相分离形貌的影响.结果表明:PEO-b-PS薄膜发生微相分离后呈现PS锥状突起的分散形貌；提高热处理温度使微相分离加快,相分离程度提高,PS微区尺寸增大；延长热处理时间使PS锥状突起更加明显；PEO链长一定时,PS链长增加导致PS锥状微区数量和尺寸增加；PS链长一定时,PEO链长增加使PS锥状微区数量减少；嵌段比一定时,嵌段共聚物分子量增加使PS微区尺寸增大.通过调节PEO-b-PS嵌段结构和薄膜的热处理条件,可以实现对PEO-b-PS薄膜微相分离结构的控制. |
| 关键词: 氧化乙烯与苯乙烯嵌段共聚物 薄膜 微相分离 形貌结构 热处理条件 |
| DOI：10.11951/j.issn.1005-0299.20120419 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(20674032). |
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| Microphase separation morphologies of PEO-b-PS thin films |
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ZHANG Wei-wei, XU Zhi-guang, ZHU Meng-bing, YU Qiang
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School of Materials Science & Engineering,Changzhou University,Changzhou 213164,China
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| Abstract: |
| To adjust microphase separation morphologies and nanostructures in the thin films of diblock copolymers of ethylene oxide and styrene (PEO-b-PS),the PEO-b-PS with different block lengths and ratios were synthesized by using atom transfer radical polymerization(ATRP)technique.The block copolymers were dissolved in THF and PEO-b-PS thin films were prepared by spin coating.The measurements of AFM were conducted to investigate the effects of block structure and heat treatment on the microphase separation morphologies of PEO-b-PS thin films.It was found that the microphase separation occurred in PEO-b-PS films,with cone-shaped PS microphases projecting from the surface of the films.The higher the heat treatment temperature was,the quicker the microphase separation developed,and the larger the PS microphase regions were.As the heat treatment process prolonged,the cone-shaped morphology of PS microphases became clearer.When the chain length of PEO block in PEO-b-PS was fixed,the longer chain length of the PS block led to increases in both the number and the size of cone-shaped PS microphase regions.With the same chain length of PS block in PEO-b-PS,the increase of chain length of PEO block led to the decrease of the number of cone-shaped PS microphases.Also,the increase of molecular weight of PEO-b-PS made cone-shaped PS microphase become larger.The microphase separation structures of PEO-b-PS thin films could be adjusted by controlling the block structures of PEO-b-PS and the heat treatment conditions. |
| Key words: PEO-b-PS thin film microphase separation structural morphology heat treatment conditions |
