通过涨落辅助的嵌段共聚物合金解缠结制备超各向异性层状结构。
Creating Extremely Asymmetric Lamellar Structures via Fluctuation-Assisted Unbinding of Miktoarm Star Block Copolymer Alloys.
机构信息
#Department of Materials Science and Engineering, University of Ioannina, University Campus, Ioannina, Greece 45110.
⊥McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States.
出版信息
J Am Chem Soc. 2015 May 20;137(19):6160-3. doi: 10.1021/jacs.5b02881. Epub 2015 May 5.
We report the creation of highly asymmetric lamellar structures with a well-designed miktoarm star block copolymer of the S(IS')3 type, where S and S' are polystyrenes of different lengths and I is poly(isoprene). The domain spacing can be tuned continuously from 37 nm to over 300 nm when the miktoarm star block copolymer is blended with suitable molecular weight polystyrene homopolymers. Beyond the unbinding transition of the lamellar phase, extremely asymmetric lamellar structures were obtained with up to 97 wt % polystyrene, remarkably leaving the poly(isoprene) layers intact at only 3 wt %!
我们报告了一种高度不对称的层状结构的创建，该结构采用了设计良好的 S(IS')3 型混合臂星型嵌段共聚物，其中 S 和 S'是不同长度的聚苯乙烯，I 是聚异戊二烯。当混合臂星型嵌段共聚物与合适分子量的聚苯乙烯均聚物共混时，其畴间距可以从 37nm 连续调节到 300nm 以上。在层状相的非键合转变之外，甚至在高达 97wt%的聚苯乙烯中也可以得到非常不对称的层状结构，令人惊讶的是，仅 3wt%的聚异戊二烯层仍然完整！
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