Abstract
Based on Diels-Alder reaction, a furyl-telechelic semicrystalline polycaprolactone was crosslinked by a tris-maleimide crosslinker. The synthesized precursors and network were fully characterized via proton nuclear magnetic resonance (1H NMR) and Fourier transform infrared (FT-IR) spectroscopies, gel permeation chromatography (GPC), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and wide-angle powder X-ray diffraction (XRD) measurements. The obtained material showed mendability of scratches under thermal treatment, as evidenced by optical microscopy and tensile analysis. The mending process was a combination of the shape recovery effect favoring scratch closure and the re-crosslinking of the cleaved Diels-Alder bonds at temperatures slightly above the melting transition of polycaprolactone chains. A scratch healing efficiency determined by tensile tests of about 70 % was achieved.
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