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Chemistry and Industry of Forest Products ›› 2018, Vol. 38 ›› Issue (1): 39-46.doi: 10.3969/j.issn.0253-2417.2018.01.006

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Synthesis and Properties of Gallic Acid-based Non-isocyanate Polyurethanes Modified with Polysiloxane

LIU Guifeng, WU Guomin, CHEN Jian, KONG Zhenwu   

  1. Institute of Chemical Industry of Forest Products, CAF;National Engineering Lab. for Biomass Chemical Utilization;Key and Open Lab. of Forest Chemical Engineering, SFA;Key Lab. of Biomass Energy and Materials, Jiangsu Province, Nanjing 210042, China
  • Received:2017-10-31 Online:2018-02-25 Published:2018-02-28

Abstract: A cyclic carbonate-functionalized polysiloxane (CCPS) was successfully synthesized by hydrosilylation of poly (methylhydrosiloxane)(PMHS) with allyl glycidyl carbonate (AGC) by using H2PtCl6 as catalyst.The CCPS was subsequently incorporated into gallic acid-based non-isocyanate polyurethane (GNIPU) networks to form GNIPU-CCPS composites.The chemical structure of CCPS was characterized by FT-IR,1H NMR and 13C NMR,as well as,the effects of CCPS on mechanical and thermal properties of GNIPU were investigated.The GNIPU-CCPS coatings exhibited excellent properties such as flexibility (0.5 mm),adhesion (grade 1) and impact strength (≥ 50 kg·cm).Furthermore,with the increase of CCPS content,the thermal stability,flexibility and water resistance of the coatings were increased,while the glass transition temperature and pencil hardness of the coatings were decreased.

Key words: gallic acid, non-isocyanate polyurethane, polysiloxane, preparation, property

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