Chinese Journal of Applied Chemistry ›› 2019, Vol. 36 ›› Issue (5): 532-538.DOI: 10.11944/j.issn.1000-0518.2019.05.180233

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Preparation and Properties of Polyurethane Modified by Acrylate/Nano-SiO2 Composites

CHEN Guangmeia*(),WANG Zhikuna,WU Lixiab,HUANG Yipingb   

  1. aSchool of Material and Chemical Engineering,Anhui Jianzhu University,Hefei 230601,China
    bSchool of Chemistry and Chemical Engineering of Anhui University,Hefei 230601,China
  • Received:2018-07-03 Accepted:2018-10-18 Published:2019-05-01 Online:2019-05-06
  • Contact: CHEN Guangmei
  • Supported by:
    Supported by the Key Project of Anhui Education Department(No.KJ2018A0514)


Polyurethane-acrylate/nano-SiO2(PUAS) composite emulsions were synthesized by in situ polymerization accompanying sol-gel process, in which the hydrolysis reaction and polymerization of monomers were accomplished at the same time. The properties and structure of the films and emulsion were characterized by a laser particle size analyzer, scanning electron microscopy(SEM) and transmission electron microscopy(TEM), etc. The results indicated that with the increase of the mass fraction of tetraethylorthosilicate(TEOS), the thermostability and the mechanical properties of the films were improved remarkably. When the mass fraction of TEOS was 8% in the PUAS composite emulsion, the water absorption of the obtained film was 2.1%, the tensile strength was 16.8 MPa, the Shore hardness was 94, and the temperature for the maximal thermal mass-loss rate was 416 ℃.

Key words: waterborne polyurethane, in situ polymerization, ethyl orthosilicate, SiO2 nanoparticles