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Title: Gyroid Structures at Highly Asymmetric Volume Fractions by Blending of ABC Triblock Terpolymer and AB Diblock Copolymer

Abstract

Here, we investigated, via small angle X-ray scattering and transmission electron microscopy, the morphologies of binary blend of polyisoprene- b-polystyrene- b-poly(2-vinylpyridine) (ISP) triblock terpolymer and polyisoprene-b-polystyrene (IS) diblock copolymer. An asymmetric ISP with volume fractions ( f) of 0.12, 0.75, and 0.13 for PI, PS, and P2VP blocks, respectively, showed a new morphology: Coexistence of spheres and cylinders with tetragonal packing. Asymmetric IS with f I = 0.11 and f S =0.89 showed conventional body-centered cubic spherical microdomains. Very interestingly, a binary blend of ISP and IS with overall volume fractions of f I = 0.12, f S = 0.79, and f P = 0.09 exhibited core-shell double gyroid (CSG: Q 230 space group), where PI consists of thin core and PS forms thick shell, while P2VP becomes thin matrix. It is very unusual to form highly asymmetric CSG with the matrix having very small volume fraction (0.09).

Authors:
 [1];  [1];  [1];  [1]; ORCiD logo [1]; ORCiD logo [2]
  1. Pohang Univ. of Science and Technology, Kyungbuk (Republic of Korea)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Research Foundation of Korea (NRF); USDOE Office of Science (SC)
OSTI Identifier:
1421978
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Macromolecules
Additional Journal Information:
Journal Volume: 50; Journal Issue: 22; Journal ID: ISSN 0024-9297
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Ahn, Seonghyeon, Kwak, Jongheon, Choi, Chungryong, Seo, Yeseong, Kim, Jin Kon, and Lee, Byeongdu. Gyroid Structures at Highly Asymmetric Volume Fractions by Blending of ABC Triblock Terpolymer and AB Diblock Copolymer. United States: N. p., 2017. Web. doi:10.1021/acs.macromol.7b01734.
Ahn, Seonghyeon, Kwak, Jongheon, Choi, Chungryong, Seo, Yeseong, Kim, Jin Kon, & Lee, Byeongdu. Gyroid Structures at Highly Asymmetric Volume Fractions by Blending of ABC Triblock Terpolymer and AB Diblock Copolymer. United States. doi:10.1021/acs.macromol.7b01734.
Ahn, Seonghyeon, Kwak, Jongheon, Choi, Chungryong, Seo, Yeseong, Kim, Jin Kon, and Lee, Byeongdu. Wed . "Gyroid Structures at Highly Asymmetric Volume Fractions by Blending of ABC Triblock Terpolymer and AB Diblock Copolymer". United States. doi:10.1021/acs.macromol.7b01734. https://www.osti.gov/servlets/purl/1421978.
@article{osti_1421978,
title = {Gyroid Structures at Highly Asymmetric Volume Fractions by Blending of ABC Triblock Terpolymer and AB Diblock Copolymer},
author = {Ahn, Seonghyeon and Kwak, Jongheon and Choi, Chungryong and Seo, Yeseong and Kim, Jin Kon and Lee, Byeongdu},
abstractNote = {Here, we investigated, via small angle X-ray scattering and transmission electron microscopy, the morphologies of binary blend of polyisoprene-b-polystyrene-b-poly(2-vinylpyridine) (ISP) triblock terpolymer and polyisoprene-b-polystyrene (IS) diblock copolymer. An asymmetric ISP with volume fractions (f) of 0.12, 0.75, and 0.13 for PI, PS, and P2VP blocks, respectively, showed a new morphology: Coexistence of spheres and cylinders with tetragonal packing. Asymmetric IS with fI = 0.11 and fS =0.89 showed conventional body-centered cubic spherical microdomains. Very interestingly, a binary blend of ISP and IS with overall volume fractions of fI = 0.12, fS = 0.79, and fP = 0.09 exhibited core-shell double gyroid (CSG: Q230 space group), where PI consists of thin core and PS forms thick shell, while P2VP becomes thin matrix. It is very unusual to form highly asymmetric CSG with the matrix having very small volume fraction (0.09).},
doi = {10.1021/acs.macromol.7b01734},
journal = {Macromolecules},
issn = {0024-9297},
number = 22,
volume = 50,
place = {United States},
year = {2017},
month = {11}
}

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