Self-assembly of semicrystalline PE-b-PS diblock copolymers within AAO nanoporous templates

POLYMER

卷:70

Article

Teresa Casas, Maria¹  Mary Michell, Rose²  Blaszczyk-Lezak, Iwona³  Puiggali, Jordi¹  Mijangos, Carmen^3,4,5,6  Lorenzo, Arnaldo T.^2,7  Mueller, Alejandro J.^2,4,5,6 

[1] Univ Politecn Cataluna, Dept Engn Quim, E-08028 Barcelona, Spain

[2] Univ Simon Bolivar, Dept Ciencia Mat, Grp Polimeros USB, Caracas 1080A, Venezuela

[3] CSIC, Inst Ciencia & Tecnol Polimeros, E-28006 Madrid, Spain

[4] Univ Basque Country UPV EHU, Fac Chem, POLYMAT, Donostia San Sebastian 20018, Spain

[5] Univ Basque Country UPV EHU, Fac Chem, Polymer Sci & Technol Dept, Donostia San Sebastian 20018, Spain

[6] Ikerbasque, Basque Fdn Sci, E-48011 Bilbao, Spain

[7] Dow Chem Co USA, Freeport, TX 77541 USA

关键词: Confined crystallization;    Core-shell morphology;    AAO templates;    Block copolymers;   

DOI  :  10.1016/j.polymer.2015.06.025

来源: Elsevier

【 摘 要 】

Strongly segregated polyethylene-b-polystyrene (PE-b-PS) diblock copolymers were infiltrated within anodic aluminum oxide nanoporous templates (AAO) ( with 60 nm diameter). After carefully removing the nanofibers from the nanopores, TEM revealed their morphology. This is the first time that the morphology of semi-crystalline diblock copolymers infiltrated within AAO templates is observed. Regardless of their composition, the infiltrated nanofibers are constituted by core-shell or pseudo core-shell self-assembled nanocylinders. The affinity of PE to the AAO walls tailors the morphology towards PE shells with PS cores. The PS cores for some compositions have PE inclusions whose morphology is expected on the basis of previous computer simulation studies. Morphological observations successfully explain the confined crystallization of the PE block within the nanopores and the origin of novel double confinement effects (induced by glassy PS block and rigid AAO walls) on the PE block. (C) 2015 Elsevier Ltd. All rights reserved.

【 授权许可】

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