Entropy-Driven Ultratough Blends from Brittle Polymers

Hou Xunan; Chen Shuai; Koh J. Justin; Kong Junhua; Zhang Yong-Wei; Yeo Jayven C. C.; Chen Haiming; He Chaobin

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Entropy-Driven Ultratough Blends from Brittle Polymers

机译：从脆性聚合物的熵驱动的Ultratough混合

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Polymer blends with synergetic performance play an integral part in modern society. The discovery of compatible polymer systems often relies on strong chemical interactions. By contrast, the role of entropy in polymers is often neglected. In this work, we show that entropy effect could control the phase structure and mechanical behaviors of polymer blends. For weakly interacting polymer pairs, the seemingly small mixing entropy favors the formation of nanoscale cocontinuous structures. The abundant nanointerfaces could initiate large plastic deformations by crazing or shear, thus, transforming brittle polymers (elongation < 9%) into superductile materials (elongation similar to 146%). The resultant polymer blends display high transparency, strength (similar to 70 MPa), and toughness (similar to 60 MJ/m(3)) beyond most engineering plastics. The principle of entropy-driven blends may also be applied in other polymer systems, offering a strategy to develop mechanically robust bulk polymeric materials for emerging applications such as biomedicine and electronics.

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《ACS Macro Letters》 |2021年第4期|共6页
作者
Hou Xunan; Chen Shuai; Koh J. Justin; Kong Junhua; Zhang Yong-Wei; Yeo Jayven C. C.; Chen Haiming; He Chaobin;
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作者单位

Natl Univ Singapore NUS Dept Mat Sci &

Engn Singapore 117575 Singapore;

ASTAR Inst High Performance Comp Singapore 138632 Singapore;

Natl Univ Singapore NUS Dept Mat Sci &

Engn Singapore 117575 Singapore;

ASTAR Inst Mat Res &

Engn Innovis Singapore 138634 Singapore;

ASTAR Inst High Performance Comp Singapore 138632 Singapore;

Natl Univ Singapore NUS Dept Mat Sci &

Engn Singapore 117575 Singapore;

Natl Univ Singapore NUS Dept Mat Sci &

Engn Singapore 117575 Singapore;

Natl Univ Singapore NUS Dept Mat Sci &

Engn Singapore 117575 Singapore;

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正文语种 eng
中图分类有机化学;
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Entropy-Driven Ultratough Blends from Brittle Polymers

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