共查询到19条相似文献,搜索用时 108 毫秒
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介绍了双酚A型聚碳酸酯(PC)的热分解机理及热分解产物,综述了阻燃PC/丙烯腈-丁二烯-苯乙烯共聚物(ABS)合金的研究进展,重点介绍了无卤阻燃体系包括磷系、硅系阻燃剂及复配型阻燃剂的研究进展及相关阻燃机理,并指出了阻燃PC/ABS合金将来的研究重点和发展方向。目前,PC/ABS合金的阻燃逐渐向着无卤、高效、低毒、环保的方向发展,提高阻燃剂的阻燃效率、减少添加量、降低成本和对环境的危害是今后阻燃的重要研究方向,且开发新型或复配型无卤阻燃剂已成为PC/ABS合金阻燃的必然趋势。 相似文献
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磷、溴阻燃剂在PC/ABS合金中的应用 总被引:7,自引:0,他引:7
对阻燃PC/ABS合金所用的阻燃剂进行了对比试验。结果表明。当PC/ABS质量比为7:3时,添加阻燃PC/ABS合金量的13%左右的溴系阻燃剂,可使材料的阻燃性能达到UL-94 V-0级(1.6mm);磷酸酯系阻燃剂由于对ABS的阻燃效果不好,只有在材料中PC质量分数大于70%时,才有阻燃效果;用溴-磷酸酯系阻燃剂,即使在材料中PC质量分数为50%时,也能达到UL-94 V-0级(1.6mm),说明磷与溴在PC/ABS合金中有协效作用,将磷酸酯系阻燃剂与溴系阻燃剂复配使用.在阻燃PC/ABS合金中.亦有类似的效果。 相似文献
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综述了建筑保温材料中阻燃剂的应用现状,分析了溴系、磷系、卤-磷协同阻燃剂和无机氢氧化镁阻燃剂的发展前景。结果表明,在建筑保温材料中,性能较好的溴系阻燃剂在短期内仍将大量使用;磷系阻燃剂为无卤、低烟、低毒的环保阻燃剂而备受欢迎;纳米氢氧化镁阻燃剂是最具发展前景的新型无机环保阻燃剂。 相似文献
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《塑料工业》2017,(6)
通过磷系阻燃剂(FR)阻燃聚碳酸酯/丙烯腈-丁二烯-苯乙烯(PC/ABS)共混物,制备阻燃材料,研究磷系阻燃剂对PC/ABS阻燃复合材料的燃烧行为和热稳定性的影响。通过UL94垂直燃烧测试、极限氧指数(LOI)测试、马弗炉测试等表征方法,对PC/ABS阻燃复合材料的燃烧行为进了系统的研究。结果表明,磷系阻燃添加量为15%时,PC/ABS阻燃复合材料能够达到UL94 V-2级,LOI的值为29.3%,高温时的残炭量由11.2%提高到20.8%。其中FR阻燃剂在高温下可以产生磷酸酯类黏稠难燃物质,能够有效地起到凝聚相阻燃作用,提高了PC/ABS共混物材料的阻燃性能,表现出良好的阻燃效果。 相似文献
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Weihua Wang Guoqun Zhao Xianghong Wu Xiuhong Li Chenggong Wang 《Polymer Composites》2015,36(9):1653-1663
In this study, standard test specimens with flame‐retarded short glass fiber‐reinforced PC/ABS materials were fabricated under rapid thermal cycle injection molding condition by selecting a potassium perfluorobutane sulfonate flame retardant specially used for PC, FR2025, and two kinds of aryl phosphorus halogen‐free flame retardants, UN707 and PX‐220. The flame‐retardancy effect of the above different flame retardants on the studied systems was compared through combustion tests of the specimens. Meanwhile, the thermal and mechanical properties of flame‐retarded composites were studied by using the thermogravimetry analysis, dynamic mechanical thermal analysis (DMTA), and universal testing machine. The results show that the “candlewick effect” of fibers exacerbates the fire behavior of composites. With the increase of the aryl phosphorus halogen‐free flame retardants, the flame‐retardancy effect of composites is obviously improved, and the maximum thermal degradation rate of composites is significantly decreased. The UL94 combustion rating is improved, and the time of residual flame is substantially reduced with the increase of PC content under the same content of flame retardant. The DMTA results show that the flame retardants have a reinforcement action on PC/ABS matrix. However, the macroscopic mechanical properties are slightly decreased in the glass fiber‐reinforced composites because of the destructive effect of the flame retardants on the interface compatibility between matrix and fibers; the scanning electron microscopic micrographs of tensile fracture fully prove this action mechanism of flame retardants. In addition, the addition of toughener and antidripping additive significantly affects the flame retardancy and mechanical properties of composites. POLYM. COMPOS., 36:1653–1663, 2015. © 2014 Society of Plastics Engineers 相似文献
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This paper presents an overview of the recent literature on flame retardancy of polycarbonate (PC) and polycarbonate‐based resins. A brief survey of the major mechanisms of thermal decomposition of PC is also presented because it gives insight in the mechanisms of flame retardant action. Mostly industrial laboratories are involved in the development of new flame retardants for PC and, to a much lesser extent, academic laboratories are doing research on the mechanistic aspects of flame retardancy. The number of patents published annually on the flame retardancy of PC and its blends significantly exceeds the number of patents on flame retardancy of any other polymer. Because PC is a naturally high charring polymer, the condensed phase active flame retardants, in particular phosphorus‐based ones, are widely used in PC‐based blends. Plain PC can pass stringent flame retardant tests with very low additions of some sulfur‐ or silicone‐based flame retardants. Copyright © 2005 Society of Chemical Industry 相似文献
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研究了四苯基间苯二酚基二磷酸酷(RDP)和氢氧化铝复配阻燃体系对PC/ABS合金性能的影响;并以马来酸酐接枝丙烯腈-苯乙烯-丁二烯共聚物(ABS-g-MAH)为相容剂,考察了ABS-g-MAH的用量对合金性能的影响.结果表明,复配阻燃体系可显著提高PC/ABS合金的阻燃性能,当RDP为14份、Al(OH)3为6份时,氧指数可达到32%;相容剂的加人能够明显提高合金的力学性能,最佳用量为6%,但使体系的黏度增加,熔体质量流动速率降低. 相似文献
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PC/ABS合金用磷酸酯阻燃剂应用进展 总被引:7,自引:1,他引:6
概述了国外用于PC/ABS合金的磷酸酯阻燃剂单磷酸酯、双磷酸酯和磷酸胺的现状与研究进展。近年来许多跨国公司在PCJABS合金的阻燃剂上投入大量的研究工作。近期发表的关于PC/ABS合金阻燃剂的专利数目大大超过了任何一种聚合物阻燃剂的专利数量。由于聚碳酸酯是燃烧成炭率很高的聚合物,以固相作用为主的阻燃剂尤其是磷酸酯成为PC/ABS合金阻燃剂的最佳选择。 相似文献
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无卤磷氮阻燃剂的合成及在PC阻燃中的应用 总被引:3,自引:0,他引:3
汤俊杰;唐安斌;黄杰 《中国塑料》2009,23(4):71-75
以9, 10-二氢-9-氧杂-10-膦菲-10-氧化物(DOPO)和N-苯基马来酰亚胺(N-PMI)为原料,合成了一种新型无卤含氮氧杂膦菲阻燃剂DOPMI,通过FT-IR、LC-MS、TG和DSC对DOPMI做了结构表征和热性能分析。研究了DOPMI及与其他阻燃剂复配应用于聚碳酸酯(PC)后对阻燃性能、力学性能、热分解行为及残炭形貌的影响。结果表明:含3%DOPMI、2%甲基苯基聚硅氧烷(MPS)和24%含磷阻燃PET的PC体系阻燃级别达UL 94 V-0级,LOI提高到30.4%;阻燃剂的加入使PC的缺口冲击强度和拉伸强度有所降低;DOPMI虽不能增加PC的成炭率,但可加速PC交联成炭;此外,SEM照片显示,DOPMI能促使PC发泡,MPS能起到协效阻燃的作用。 相似文献
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