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    Improvement of thermodynamic properties of poly(butanediol sebacate-butanediol terephthalate) (PBSeT) composites based on the dispersion of PCaCO3@tannic acid formed by complexation of tannic acid and Ti

    Year: 2022

    Journal: Adv. Compos. Hybrid Mater., Volume 5, DEC, page 2787–2800

    Authors: Liu, Tong; Li, Zhimao; Jiang, Tianxiang; Xi, Shaohua; Li, Yingchun; Guo, Jiang; Huang, Mina; Algadi, Hassan; Ye, Xinming; Jiang, Qinglong

    Organizations: Natural Science Basic Research Program of Shaanxi [2022JQ-441]

    Keywords: Nano-CaCO3; Tannic acid; Thermal stability; Puncture load; Biodegradable materials

    Poly(butanediol sebacate-butanediol terephthalate) (PBSeT) has the excellent biodegradability. And nano-CaCO3 modified by titanate coupling agent is frequently added into polymers as an additive to reduce costs. In this research, the PBSeT-based composite was prepared by the melt blending method. Compared with PBSeT, the maximum thermal decomposition temperature, Young's modulus, and glass transition temperature of the composite material were advanced by 12.67 celcius, 64.5%, and 10.36 celcius when the content of tannic acid (TA) was 2, 4, and 6 wt%, respectively. Peculiarly, the puncture load of the composite was increased by 71.7% when the TA was 8 wt%; meanwhile, the degradation performance and water absorption performance were also better than other composites. Based on the comprehensive analysis of the experimental results, a complex named PCaCO3@TA was formed by interacting TA with Ti from the titanate coupling agent and coated the surface of nano-CaCO3 to change the dispersion of nano-CaCO3. Moreover, glycerol is mainly concentrated in the BSe segment as polyphenol membrane attracting the secondary hydroxyl group from the unreacted glycerol.
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