Direct Imaging of the Crystalline Domains and Their Orientation in the PS-b-PEO Block Copolymer with 4D-STEM

被引：1

作者：

Chen, Min ^{[1
,2
,3
]}

Bustillo, Karen C. ^{[3
]}

Patel, Vivaan ^{[2
,4
]}

Savitzky, Benjamin H. ^{[3
]}

Sternlicht, Hadas ^{[1
,3
]}

Maslyn, Jacqueline A. ^{[2
,4
]}

Loo, Whitney S. ^{[2
,4
,5
]}

Ciston, Jim ^{[3
]}

Ophus, Colin ^{[3
]}

Jiang, Xi ^{[2
]}

Balsara, Nitash P. ^{[2
,4
]}

Minor, Andrew M. ^{[1
,2
,3
]}

机构：

[1] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA

[2] Lawrence Berkeley Natl Lab, Mat Sci Div, Berkeley, CA 94720 USA

[3] Lawrence Berkeley Natl Lab, Natl Ctr Electron Microscopy, Mol Foundry, Berkeley, CA 94720 USA

[4] Univ Calif Berkeley, Dept Chem & Biomol Engn, Berkeley, CA 94720 USA

[5] Univ Wisconsin Madison, Dept Chem & Biol Engn, Madison, WI 53706 USA

来源：

MACROMOLECULES | 2024年 / 57卷 / 12期

关键词：

IONIC-CONDUCTIVITY; ELECTROLYTES; POLYMERS; LAMELLAE;

D O I：

10.1021/acs.macromol.3c02231

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The arrangement of crystalline domains in semicrystalline polymers is key to understanding how to optimize the nanostructured morphology for enabling better properties. For example, in polystyrene-b-poly(ethylene oxide) (PS-b-PEO), the degree of crystallinity and arrangement of the crystallites within the PEO phase plays a crucial role in determining the physical properties of the electrolyte. Here, we used four-dimensional scanning transmission electron microscopy to directly visualize the crystal domains within the PEO-rich region of the PS-b-PEO block copolymer and show the relative angle of the domain with respect to the PEO-PS interface. As demonstrated here, our analysis method is applicable to other electron-beam sensitive materials, especially semicrystalline polymers, to unveil their local phase condition and distribution.

引用

页码：5629 / 5638

页数：10