Journal
SMART MATERIALS AND STRUCTURES
Volume 23, Issue 6, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0964-1726/23/6/067002
Keywords
temperature sensor; anti-counterfeit; shape memory effect; heating-responsive; PMMA
Funding
- Fundamental Research Funds for the Central Universities of PR China [HIT.BRETIV.201304]
- National Natural Science Foundation of PR China [51303070]
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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.
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