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Appl. Sci. 2017, 7(8), 848; doi:10.3390/app7080848

Thermo-Responsive Shape-Memory Effect and Surface Features in Polycarbonate (PC)

1
School of Mechanical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
2
School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
3
School of Chemistry and Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, China
*
Author to whom correspondence should be addressed.
Received: 9 July 2017 / Revised: 20 July 2017 / Accepted: 16 August 2017 / Published: 17 August 2017
(This article belongs to the Special Issue Shape Memory Polymers)

Abstract

The influence of programming strain and temperature on the shape memory effect and surface morphology in programmed polycarbonate (PC) samples via uni-axial stretching is investigated. It is found that the samples programmed at around the glass transition start temperature not only have micro-cracks on their surface, but also show a necking phenomenon. Furthermore, the surface of the necked area is concave, but the surface of the non-necked area is convex. On the other hand, despite the samples programmed at high temperatures being able to deform in a uniform manner at macroscopic scale, their surfaces are still uneven, either concave or convex. While the samples programmed at low temperatures are able to achieve full shape recovery, stretching at higher temperatures over the glass transition range to a higher strain may result in non-recoverable deformation. View Full-Text
Keywords: polycarbonate; shape memory effect; necking; crack; shape recovery; concave; convex polycarbonate; shape memory effect; necking; crack; shape recovery; concave; convex
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Wu, X.; Wang, T.; Huang, W.; Zhao, Y. Thermo-Responsive Shape-Memory Effect and Surface Features in Polycarbonate (PC). Appl. Sci. 2017, 7, 848.

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