Effect of dosage of expandable graphite,dimethyl methylphosphonate,triethanolamine,and isocyanate on fluidity,mechanical,and flame retardant properties of polyurethane materials in coal reinforcement

Hu; Xiangming; Wang; Deming; Cheng; Weimin

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Effect of dosage of expandable graphite,dimethyl methylphosphonate,triethanolamine,and isocyanate on fluidity,mechanical,and flame retardant properties of polyurethane materials in coal reinforcement

机译：可膨胀石墨，二甲基甲基膦酸二甲酯，三乙醇胺和异氰酸酯的添加量对煤增强聚氨酯材料流动性，力学性能和阻燃性能的影响

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In this study,orthogonal experiments were conducted to investigate the influence of expandable graphite(EG),dimethyl methylphosphonate(DMMP),triethanolamine(TEA),and isocyanate content on the compressive and bonding strengths,oxygen index,and fluidity of rigid polyurethane foam(RPUF).The results revealed that EG significantly increased the oxygen index of RPUF,enlarged the diameter of foam cells,and decreased the cell-closed content in foam;thus,leading to a pressure drop in RPUF.However,excessive EG was capable of reducing the fluidity of polyurethane slurry.TEA exhibited significant influence on the compressive strength of RPUF,which dropped initially,and then increased.DMMP had a remarkable effect on the flame retardant property and compressive strength of RPUF.Compressive strength of RPUF initially displayed an increase followed by a decrease with increasing dosage of DMMP,and achieved the maximum value at DMMP dosage of 4%.DMMP could effectively reduce the diameter of RPUF cells leading to an increase in the percentage of close area in foam.DMMP displayed the flame-retardation effects mainly in the gas phase leading to a significant enhancement in the oxygen index of RPUF.Moreover,the compressive strength and bonding strength of RPUF decrease significantly with the increase of isocyanate content due to the increased blowing efficiency by the CO_2.The oxygen index and flowing length of foam increased with the increase in isocyanate dosage.

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《矿业科学技术学报：英文版》 |2016年第002期|P.345-352|共8页
作者
Hu; Xiangming; Wang; Deming; Cheng; Weimin;
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作者单位

[1]Key Laboratory of Gas and Fire Control for Coal Mines of Ministry of Education, Faculty of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China;

[2]Key Laboratory of Mine Disaster Prevention and Control, College of Resource and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China;

[3]Department of Resources and Environment, Binzhou University, Binzhou 256603, Chino;

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收录信息中国科学引文数据库(CSCD);
原文格式 PDF
正文语种 CHI
中图分类磷有机化合物;
关键词
甲基膦酸二甲酯; 聚氨酯材料; 可膨胀石墨; 异氰酸酯; 三乙醇胺; 阻燃性能; 硬质聚氨酯泡沫塑料; 流动;

机译：甲基膦酸二甲酯;聚氨酯材料;可膨胀石墨;异氰酸酯;三乙醇胺;阻燃性能;硬质聚氨酯泡沫塑料;流动;

Effect of dosage of expandable graphite,dimethyl methylphosphonate,triethanolamine,and isocyanate on fluidity,mechanical,and flame retardant properties of polyurethane materials in coal reinforcement

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