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Programming of macro/micro scale information on shape memorizing polyvinyl acetate film

机译:宏观/微观尺度信息的编程成形乙酸薄膜

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摘要

The shape memory behavior of polyvinyl acetate (PVAc), both at macroscale and microscale, is presented. PVAc films exhibited excellent efficiency in programming macroscale deformation. Cyclic tensile tests on PVAc films revealed the importance of molecular weight in programming macroscale deformation in film. PVAc film with the highest molecular weight (similar to 228 kDa) exhibited maximum durability in programming macroscale deformation. This gives an important insight to the discovery of new shape memory polymers since chain entanglements in high molecular weight glassy polymers can impart shape memory behavior. In addition, such shape memory behavior can be exploited to imprint and tune microscale patterns on the film. Microprismatic patterns were embossed and programmed on shape memorizing PVAc films. Two different test methodologies were used to study the programmability of patterns on PVAc films. Pattern programming was significantly affected by the method used. In both cases, recovery time and temperature were two important parameters to determine the efficiency of programming. In addition, optical properties of PVAc films could be switched between reflective and transparent by programming patterns on the surface of the film. (C) 2016 Wiley Periodicals, Inc.
机译:提出了在Macroscale和Microscale的聚乙烯醇(PVAC)的形状记忆行为。 PVAC薄膜在编程宏观变形方面表现出优异的效率。 PVAC膜上的循环拉伸试验揭示了分子量在薄膜中编程Macroscale变形中的重要性。具有最高分子量(类似于228kDa)的PVAC膜在编程Macroscale变形方面表现出最大的耐久性。这对新形状记忆聚合物的发现提供了重要的洞察,因为高分子量玻璃聚合物中的链缠结可以赋予形状存储器行为。另外,这种形状存储器行为可以被利用到胶片上的压印和调谐微观图案。微观图案被压花和编程在记忆PVAC膜的形状上。两种不同的测试方法用于研究PVAC膜上图案的可编程性。模式编程受到使用方法的显着影响。在这两种情况下,恢复时间和温度是确定编程效率的两个重要参数。另外,通过在薄膜表面上的编程图案,可以在反射和透明之间切换PVAC膜的光学性质。 (c)2016 Wiley期刊,Inc。

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