Thermostimulative shape-memory effect of reactive compatibilized high-density polyethylene/poly(ethylene terephthalate) blends by an ethylene-butyl acrylate-glycidyl methacrylate terpolymer

2009 ◽  
Vol 112 (6) ◽  
pp. 3341-3346 ◽  
Author(s):  
Shu-Cai Li ◽  
Li-Nong Lu ◽  
Wei Zeng
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Butyl Acrylate ◽  
High Density Polyethylene ◽  
Glycidyl Methacrylate ◽  
Ethylene Terephthalate ◽  
High Density ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Triple-shape memory effect in poly (ethylene terephthalate) (PET) film

2018 ◽  
Vol 47 (1) ◽  
pp. 55-62 ◽  
Author(s):  
Xue Lian Wu ◽  
Chuan Peng Yang ◽  
Yu Qin Guo ◽  
Hong Yu Wang
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Ethylene Terephthalate ◽  
Content Type ◽  
Poly Ethylene Terephthalate ◽  
The Difference ◽  
Triple Shape Memory ◽  
Poly Ethylene ◽  
Pet Film

Purpose This paper aims to focus on achieving triple-shape memory effect (triple-SME) of a commercial poly (ethylene terephthalate) (PET) film with the thickness of 100 µm. Design/methodology/approach The thermal characteristics and microstructure of PET film were characterized by differential scanning calorimetry, thermogravimetric analysis and wide-angle X-ray diffraction analysis. The dual-shape memory effect (dual-SME) of the PET film was then systematically investigated, and based on that, triple-SME in thin PET film was achieved. Findings Investigation of the dual-SME in PET film revealed the difference between recovery temperature and programming temperature reduced with increasing programming temperature. An obvious intermediate shape shifting between the original and final programmed shape was observed during shape recovery in triple-shape memory behaviors. Research limitations/implications Compared with dual-SME in polymer, relatively less work has been done on multi-SME in polymer, especially in thin polymer film. In this study, triple-SME in a PET film was investigated based on the results of dual-SME of the film. The main implication of the study is on how to achieve a watermark between the final programmed pattern and the original pattern, for the application of shape memory polymer in anti-counterfeiting label. Originality/value Dual- and triple-SMEs were achieved in a PET film that is only 100 µm in thickness, and the underlying mechanism for the difference between programming temperature and recovery temperature was discussed. For the novel application of triple-SME in anti-counterfeit label, the watermark during shape recovery in triple-SME can effectively prevent duplication.

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