ACS Applied Materials & Interfaces
ACS Applied Materials & Interfaces
5 years ago

Ductile Glass of Polyrotaxane Toughened by Stretch-Induced Intramolecular Phase Separation

Ductile Glass of Polyrotaxane Toughened by Stretch-Induced Intramolecular Phase Separation
Kohzo Ito, Kaito Nemoto, Hideaki Yokoyama, Kazuaki Kato, Koichi Mayumi
A new class of ductile glasses is created from a thermoplastic polyrotaxane. The hard glass, which has a Young’s modulus of 1 GPa, shows crazing, necking, and strain hardening with a total elongation of 330%. Stress concentration is prevented through a unique stretch-induced intramolecular phase separation of the cyclic components and the exposed backbone. In situ synchrotron X-ray scattering studies indicate that the backbone polymer chains slip through the cyclic components in the regions where the stress is concentrated.

Publisher URL: http://dx.doi.org/10.1021/acsami.7b10845

DOI: 10.1021/acsami.7b10845

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