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

doi:10.11944/j.issn.1000-0518.2019.05.180233

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 Guangmei^a^*(),WANG Zhikun^a,WU Lixia^b,HUANG Yiping^b

^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)

Abstract

Abstract:

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

CHEN Guangmei,WANG Zhikun,WU Lixia,HUANG Yiping. Preparation and Properties of Polyurethane Modified by Acrylate/Nano-SiO₂ Composites[J]. Chinese Journal of Applied Chemistry, 2019, 36(5): 532-538.

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

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