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Effect of Silane Treatment on Mechanical Properties of Polyurethane/Mesoscopic Fly Ash Composites

In view of the accidents such as rock mass breakage, roof fall and coal slide in coal mines, polyurethane/mesoscopic fly ash (PU/MFA) reinforcement materials were produced from polymethylene polyphenylene isocyanate (PAPI), the polyether polyol, flame retardant, and MFA using stannous octanate as a...

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Autores principales: Qin, Chuanrui, Lu, Wei, He, Zhenglong, Qi, Guansheng, Li, Jinliang, Hu, Xiangming
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6524166/
https://www.ncbi.nlm.nih.gov/pubmed/31022965
http://dx.doi.org/10.3390/polym11040741
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author Qin, Chuanrui
Lu, Wei
He, Zhenglong
Qi, Guansheng
Li, Jinliang
Hu, Xiangming
author_facet Qin, Chuanrui
Lu, Wei
He, Zhenglong
Qi, Guansheng
Li, Jinliang
Hu, Xiangming
author_sort Qin, Chuanrui
collection PubMed
description In view of the accidents such as rock mass breakage, roof fall and coal slide in coal mines, polyurethane/mesoscopic fly ash (PU/MFA) reinforcement materials were produced from polymethylene polyphenylene isocyanate (PAPI), the polyether polyol, flame retardant, and MFA using stannous octanate as a catalyst. 3-Glycidoxypropyltrimethoxysilane (GPTMS) was grafted on MFA surface, aiming to improve the mechanical properties of PU/MFA composites. The analyses of infrared spectroscopy and compression resistance reveal that the GPTMS can be successfully attached to the surface of MFA, and the optimum modification dosage of GPTMS to MFA is 2.5 wt. % (weight percent). On this basis, the effect of GPTMS on the mechanical properties of PU/MFA reinforcement materials during the curing process was systematically investigated through a compression test, a fracture toughness test, a three-point bending test, a bond property test, and a dynamic mechanics analysis. The results show that the compression property, fracture toughness, maximum flexural strength, and bond strength of PU/MFA composites increase by 21.6%, 10.1%, 8.8%, and 19.3%, respectively, compared with the values before the modification. Furthermore, the analyses of scanning electron microscope and dynamic mechanics suggest that the coupling agent GPTMS can successfully improve the mechanical properties of PU/MFA composites because it eliminates the stress concentration and exerts a positive effect on the crosslink density and hardness of PU/MFA composites.
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spelling pubmed-65241662019-06-03 Effect of Silane Treatment on Mechanical Properties of Polyurethane/Mesoscopic Fly Ash Composites Qin, Chuanrui Lu, Wei He, Zhenglong Qi, Guansheng Li, Jinliang Hu, Xiangming Polymers (Basel) Article In view of the accidents such as rock mass breakage, roof fall and coal slide in coal mines, polyurethane/mesoscopic fly ash (PU/MFA) reinforcement materials were produced from polymethylene polyphenylene isocyanate (PAPI), the polyether polyol, flame retardant, and MFA using stannous octanate as a catalyst. 3-Glycidoxypropyltrimethoxysilane (GPTMS) was grafted on MFA surface, aiming to improve the mechanical properties of PU/MFA composites. The analyses of infrared spectroscopy and compression resistance reveal that the GPTMS can be successfully attached to the surface of MFA, and the optimum modification dosage of GPTMS to MFA is 2.5 wt. % (weight percent). On this basis, the effect of GPTMS on the mechanical properties of PU/MFA reinforcement materials during the curing process was systematically investigated through a compression test, a fracture toughness test, a three-point bending test, a bond property test, and a dynamic mechanics analysis. The results show that the compression property, fracture toughness, maximum flexural strength, and bond strength of PU/MFA composites increase by 21.6%, 10.1%, 8.8%, and 19.3%, respectively, compared with the values before the modification. Furthermore, the analyses of scanning electron microscope and dynamic mechanics suggest that the coupling agent GPTMS can successfully improve the mechanical properties of PU/MFA composites because it eliminates the stress concentration and exerts a positive effect on the crosslink density and hardness of PU/MFA composites. MDPI 2019-04-24 /pmc/articles/PMC6524166/ /pubmed/31022965 http://dx.doi.org/10.3390/polym11040741 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Qin, Chuanrui
Lu, Wei
He, Zhenglong
Qi, Guansheng
Li, Jinliang
Hu, Xiangming
Effect of Silane Treatment on Mechanical Properties of Polyurethane/Mesoscopic Fly Ash Composites
title Effect of Silane Treatment on Mechanical Properties of Polyurethane/Mesoscopic Fly Ash Composites
title_full Effect of Silane Treatment on Mechanical Properties of Polyurethane/Mesoscopic Fly Ash Composites
title_fullStr Effect of Silane Treatment on Mechanical Properties of Polyurethane/Mesoscopic Fly Ash Composites
title_full_unstemmed Effect of Silane Treatment on Mechanical Properties of Polyurethane/Mesoscopic Fly Ash Composites
title_short Effect of Silane Treatment on Mechanical Properties of Polyurethane/Mesoscopic Fly Ash Composites
title_sort effect of silane treatment on mechanical properties of polyurethane/mesoscopic fly ash composites
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6524166/
https://www.ncbi.nlm.nih.gov/pubmed/31022965
http://dx.doi.org/10.3390/polym11040741
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