共查询到18条相似文献,搜索用时 140 毫秒
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《中国塑料》2019,(4)
制备了复合阻燃软质聚氨酯泡沫(FPUF),研究了三聚氰胺聚磷酸盐(MPP)、可膨胀型石墨(EG)和离子液体(IL)对FPUF泡沫的阻燃影响。利用氧指数(LOI)确定3种复合阻燃剂的最佳配比,通过热重(TG)和锥形量热(CCT)分析了阻燃剂对FPUF的阻燃和热稳定性的影响。结果表明,当MPP、EG、IL的质量比为7.5∶7.5∶2时,制备的阻燃FPUF的LOI达到最高27.5%;TG显示了FPUF/MPP/EG/IL的残炭量高于纯FPUF和FPUF/MPP/EG;CCT表明了热释放速率峰值和总热逐渐降低,烟释放量及CO生成率减少;因离子液的添加使炭层更加致密,3种阻燃剂协效阻燃,改善了阻燃效果,降低了火灾危险性。 相似文献
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采用聚磷酸铵(APP)、可膨胀石墨(EG)和四丙基胺四氟硼酸盐离子液体(IL)对软质聚氨酯泡沫(FPUF)进行阻燃处理。利用氧指数(LOI)优选3种阻燃剂的最佳配比,通过热重(TG)仪和锥形量热(CCT)仪研究了阻燃剂对软质聚氨酯泡沫阻燃性能和热稳定性能的影响,通过扫描电镜(SEM)研究了FPUF燃烧后残炭的微观形貌及阻燃机理。结果表明,当阻燃剂总添加量为15%、APP∶EG∶IL配比7. 5∶7. 5∶2时,氧指数达到最高,为29. 9%; p HRR逐渐降低,点燃时间变长,THR明显降低,CO_2生成率减少。含氟硼酸盐型离子液体与APP、EG的协同阻燃对FPUF的热解具有明显的催化成炭作用,改善了炭层结构,增加了阻燃效果,降低了火灾危险性。 相似文献
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以三聚氰胺改性腰果酚基阻燃多元醇和异氰酸酯为主要原料,采用环戊烷为发泡剂,添加无卤阻燃膨胀型阻燃剂石墨(EG)、匀泡剂等制备无卤阻燃生物基硬质聚氨酯泡沫塑料。探讨结构阻燃型聚醚多元醇、阻燃剂的添加对生物基硬质聚氨酯泡沫的热性能、燃烧性能和力学性能的影响。结果表明,随着阻燃剂的增加,导热系数和固化时间增加;添加相同阻燃剂的泡沫样品其阻燃性能随着添加量的增加而增加,EG在提高氧指数方面优于聚磷酸铵(APP)和乙基膦酸二乙酯(DEEP),固体阻燃剂APP和EG在增加力学性能、热稳定性方面较液体阻燃剂DEEP效果好。 相似文献
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Ying Pan 《Polymer-Plastics Technology and Engineering》2019,58(4):384-393
In this study, flexible polyurethane foam (FPUF) was modified with bio-based coatings composed of polyethylenimine (PEI) and alginate (ALG), fabricated by layer-by-layer (LbL) self-assembly. LbL self-assembled coatings modified FPUFs were studied for their potentials for removing Cu2+ ions from aqueous solutions by using batch adsorption technique, as a function of assembled bilayers number, pH value, carrier amount and adsorption time. The maximum adsorption capacity of the modified FPUF was shown to be 54 mg/g for Cu2+. Results suggested that the LbL self-assembly could potentially be a promising cost-effective technique for fabricating advanced adsorbent materials for removing pollutants from wastewater. 相似文献
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Cheng‐Qun Wang Hai‐Ning Lv Jie Sun Zai‐Sheng Cai 《Polymer Engineering and Science》2014,54(11):2497-2507
Expandable graphite (EG), dimethyl methylphosphonate (DMMP), melamine (MEL), zinc borate (ZB), or magnesium hydroxide (MH) was separately added to polyurethane to form flame retardant flexible polyurethane foam (FPUF) in one‐step. The cell morphologies of the FPUF composites before and after burning were observed by scanning electron microscopy (SEM), their flammability was evaluated by limiting oxygen index (LOI) tests, and their thermal stability and evolved gaseous products were examined by thermogravimetric analysis‐Fourier transform infrared spectroscopy (TGA‐FTIR). The results indicated that all the five flame retardants could improve the flame retardant performance of FPUF on the basis of their own mechanism. DMMP possessed the highest flame retardant efficiency, and one of the important reasons was that it could promote the formation of char. EG could inhibit molten drop of FPUF during burning effectively. All the five flame retardants could decrease the maximum decomposition velocity mainly because of their heat absorption effect. ZB displayed an excellent inhibition ability for the release of the evolved gaseous products because of its adsorption effect. All the flame retardants except DMMP were capable to decrease the CO yield at the temperature (400°C) of maximum decomposition velocity for their respective mechanisms, but all of them were not able to inhibit CO generation at higher temperature (600°C). POLYM. ENG. SCI., 54:2497–2507, 2014. © 2013 Society of Plastics Engineers 相似文献
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无卤阻燃剂中磷酸酯类化合物的研究一直是当前的研究热点,文中着重对水性聚氨酯改性提高阻燃性能的研究进行讨论,设计分析了通过FRC-6合成水性聚氨酯实现阻燃剂的性能改进,采用FRC-6替代其他小分子二醇扩链剂,可以实现合成大量的稳定的有机磷阻燃改性的水性聚氨酯;P含量的增加会降低热释放量,提高阻燃性能。这一研究对于无卤阻燃剂的改进应用具有一定的借鉴价值。 相似文献
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聚氨酯泡沫阻燃剂浅谈 总被引:16,自引:3,他引:13
介绍了在聚氨酯泡沫塑料中常用的阻燃剂,包括反应型阻燃剂和添加型阻燃剂。着重对市场上部分卤代磷酸酯阻燃剂的类型进行了介绍。简要介绍了阻燃剂的阻燃机理、聚氨酯泡沫塑料用阻燃剂的研究开发,对我国聚氨酯用阻燃剂的发展提出建议。 相似文献