Heating/ethanol-response of poly methyl methacrylate (PMMA) with gradient pre-deformation and potential temperature sensor and anti-counterfeit applications
Heating/ethanol-response of poly methyl methacrylate (PMMA) with gradient pre-deformation and potential temperature sensor and anti-counterfeit applications
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DOI：
10.1088/0964-1726/23/6/067002
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发表时间：
2014-06-01
影响因子：
4.1
通讯作者：
Geng, Junfeng
中科院分区：
文献类型：
--
作者：
Lu, Haibao;Huang, Wei Min;Geng, Junfeng
本文研究了商品聚甲基丙烯酸甲酯（PMMA）的加热/乙醇反应。所有PMMA样品都通过压模（用模具进行表面压缩）进行预变形，以引入梯度预应变/应力场。两种类型的模具用于压模。一个是新加坡硬币，另一个是一个特别设计的模具，顶部有一个可变的突出特征。演示了两种潜在的应用——监测过热温度的温度传感器和只有在加热到特定温度时才会出现水印的防伪标签。由于加热响应形状记忆效应（SME）是几乎所有聚合物的固有特征，因此其他传统聚合物也可以用于此类应用。
In this paper, the heating/ethanol-response of a commercial poly methyl methacrylate (PMMA) is investigated. All PMMA samples are pre-deformed by means of impression (surface compression with a mold) to introduce a gradient pre-strain/stress field. Two types of molds are applied in impression. One is a Singaporean coin and the other is a particularly designed mold with a variable protrusive feature on top. Two potential applications-temperature sensors to monitor overheating temperatures and anti-counterfeit labels with a water-mark that appears only upon heating to a particular temperature-are demonstrated. Since the heating-responsive shape memory effect (SME) is an intrinsic feature of almost all polymers, other conventional polymers may be used in such applications as well.