Abstract
It's significant but challenging to prepare PPC with supramechanical performance and multi-functions. In this work, a mechanically robust, fluorescent, transparent and UV-shielding PPC composite is successfully prepared for the first time by incorporating a hydroxyalkylated tannin acid (mTA). Compared to TA, mTA shows an excellent compatibility to PPC due to the grafted plentiful flexible isopropanol oligomers with terminal hydroxyl group. The effects of content and grafting degree of mTA on the mechanical properties of PPC/mTA composites are investigated and the mechanism for the high strength and high toughness is revealed. By introducing 3 phr mTA with medium grafting degree (m-mTA), PPC/m-mTA3 shows a tensile strength of 23.38 ± 0.96 MPa and an elongation at break of 852 ± 37%, which is comparable to LDPE and LLDPE and implies the great potential of PPC to replace non-biodegradable PE materials. The supramechanical performance is the result of the combined multiple hydrogen bonding and plastic deformation zone originating from the excellent compatibility. Besides, Tg of mTA will affect the yield strength of PPC/mTA composites. More importantly, PPC/m-mTA film shows the fluorescent effect with dual-mode responsiveness, good UV-shielding effect and transparency, which will expand the application of PPC into advanced packaging materials. We envision that this work opens a novel yet facile way to prepare PPC with supramechanical performance and multi-functions, and will promote the practical application of PPC materials.
Published Version
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