Shape-Memory Assisted Scratch-Healing of Transparent Thiol-Ene Coatings

A photopolymerizable thiol-ene composition was prepared as a mixture of pentaerythritol tetrakis(3-mercaptopropionate) (PETMP) and 1,3,5-triallyl-1,3,5-triazine-2,4,6(1H,3H,5H)-trione (TTT), with 1 wt. % of 2,2-dimethoxy-2-phenylacetophenone (DMPA) photoinitiator. A systematic analytical analysis th...

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Bibliographic Details
Published in:Materials 2019-02, Vol.12 (3), p.482
Main Authors: Lazauskas, Algirdas, Jucius, Dalius, Baltrušaitis, Valentinas, Gudaitis, Rimantas, Prosyčevas, Igoris, Abakevičienė, Brigita, Guobienė, Asta, Andrulevičius, Mindaugas, Grigaliūnas, Viktoras
Format: Article
Language:English
Subjects:
Carbon
Chemical bonds
Contact angle
Covalent bonds
Fourier transforms
Free radicals
Hydrogen
Image transmission
Incidence angle
Infrared spectrometers
Intermolecular forces
Optical properties
Optics
Organic chemistry
Photovoltaic cells
Polyethylene terephthalate
Polymerization
Polymers
Scratch resistance
Self healing materials
Shape memory
Stress-strain curves
Transition metals
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Summary:A photopolymerizable thiol-ene composition was prepared as a mixture of pentaerythritol tetrakis(3-mercaptopropionate) (PETMP) and 1,3,5-triallyl-1,3,5-triazine-2,4,6(1H,3H,5H)-trione (TTT), with 1 wt. % of 2,2-dimethoxy-2-phenylacetophenone (DMPA) photoinitiator. A systematic analytical analysis that investigated the crosslinked PETMP-TTT polymer coatings employed Fourier transform infrared spectroscopy, ultraviolet⁻visible spectroscopy, differential scanning calorimetry, thermogravimetric analysis, pencil hardness, thermo-mechanical cyclic tensile, scratch testing, and atomic force microscopy. These coatings exhibited high optical transparency and shape-memory that assisted scratch-healing properties. Scratches produced on the PETMP-TTT polymer coatings with different constant loadings (1.2 N, 1.5 N, and 2.7 N) were completely healed after the external stimulus was applied. The strain recovery ratio and total strain recovery ratio for PETMP-TTT polymer were found to be better than 94 ± 1% and 97 ± 1%, respectively. The crosslinked PETMP-TTT polymer network was also capable of initiating scratch recovery at ambient temperature conditions.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma12030482