共查询到19条相似文献,搜索用时 125 毫秒
1.
2.
膨胀型阻燃剂在聚丙烯中的应用研究进展 总被引:1,自引:0,他引:1
综述了近年来聚丙烯(PP)阻燃用膨胀型阻燃剂的研究应用现状,简要概述了膨胀型阻燃剂的阻燃机理,分析了膨胀型阻燃存在的不足,指出了膨胀型阻燃剂发展方向。 相似文献
3.
4.
含PEPA/纳米Al(OH)3的膨胀型阻燃聚丙烯研究 总被引:2,自引:0,他引:2
用磷酰基季戊四醇(PEPA)替代传统的季戊四醇作为炭源,与APP、三聚氰胺复合组成膨胀型阻燃剂(IFR),制备了膨胀型阻燃聚丙烯(IFR-PP)。讨论了阻燃剂对IFR-PP的阻燃性能、力学性能、热稳定性的影响,以反纳米Al(OH)3对该阻燃体系的影响。结果表明:PEPA在阻燃效果上优于季戊四醇,且PEPA对IFR-PP力学性能的影响小于季戊四醇,当PEPR用量为5份,纳米Al(OH)3用量为15份时,阻燃级别达UL-94 V-0级。同时,纳米Al(OH)3的添加使IFR-PP体系阻燃效果得到提高,且对材料的热稳定性反力学性能影响较小。 相似文献
5.
研究了以聚磷酸铵(APP)、三聚氰胺(MA)和层状复合金属氢氧化物(LDH)复配得到的膨胀阻燃剂(IFR)对聚丙烯/尼龙6(PP/PA6)合金性能的影响,分析了不同阻燃体系对PP/PA6合金的阻燃性能、力学性能、热性能和微观形态的影响。结果表明,当APP/MA/LDH为21.0/7.5/1.5(质量比)时,PP/PA6合金具有较好的阻燃性能并能保持较高的力学性能。LDH可以提高阻燃材料的热稳定性和残炭量,而且SEM照片显示炭层微观形态为“面包”状的膨松状。 相似文献
6.
7.
通过微胶囊化技术合成了新型磷氮体系无卤膨胀型阻燃剂ANTI-6用ANTI-6对聚丙烯(PP)进行阻燃改性。研究了阻燃剂ANTI-6中聚磷酸铵的微胶囊包覆;考察了阻燃剂对PP的阻燃性能、力学性能和耐水性等的影响。结果表明:包覆的聚磷酸铵粒度均匀致密,热稳定性提高;PP中添加25%ANTI-6阻燃剂可以获得良好的阻燃效果,氧指数达到30,阻燃性达UL94V~0级,改性PP具有优越的综合性能,耐热水性优于国外同类产品。 相似文献
8.
9.
采用四乙氧基硅烷(TEOS)作为改性修饰剂,分别对季戊四醇(PER)和聚磷酸铵(APP)进行表面改性,制备得到膨胀型阻燃剂(IFR),对改性后的IFR进行了红外光谱及热失重分析等表征,确认了硅的引入;向改性阻燃剂中加入纳米氧化镧(La2O3)作为阻燃协效剂,然后与聚丙烯(PP)混合,制备了疏水性膨胀型阻燃PP;研究了改性前后复合阻燃剂对PP阻燃性能和力学性能的影响。结果表明,改性后的阻燃体系表现出了较好的疏水性能,加入协效剂La2O3后,材料的阻燃性能和力学性能均较改性之前有所提高。 相似文献
10.
纳米蒙脱土和尼龙6对聚丙烯无卤体系协同阻燃作用 总被引:2,自引:2,他引:0
聚丙烯/聚磷酸铵是典型的无卤膨胀阻燃体系,只有添加大量的聚磷酸铵才能达到阻燃目的,但是往往会使聚丙烯力学性能明显下降。为了使PP达到阻燃效果的同时不明显降低其力学性能,本文通过极限氧指数(LOI)、力学性能、热重分析(TG)、扫描电镜(SEM)等分析表征手段,研究了纳米有机蒙脱土(OMMT)和尼龙6(PA6)对马来酸酐接枝聚丙烯(PP-g-MAH)增容的聚丙烯/聚磷酸铵(APP)无卤阻燃体系的燃烧性能和力学性能影响规律。研究结果表明:纳米有机蒙脱土和尼龙6对聚丙烯具有协同阻燃作用,对体系力学性能影响较小;当蒙脱土含量为4phr、尼龙6含量为8phr时,体系的极限氧指数达到25.1%;蒙脱土和尼龙6的加入可明显提高聚丙烯的热失重温度,增加残余物质量分数。 相似文献
11.
严淑芬 《现代塑料加工应用》2007,19(6):61-64
综述了近年来聚丙烯(PP)主要阻燃体系的研究进展,并叙述各类PP用复合阻燃体系如Sb203/卤系阻燃体系、磷系阻燃体系、膨胀型阻燃体系、有机硅复合体系等的研究应用状况,指出了PP阻燃的发展方向。 相似文献
12.
The flame retardant polypropylene containing the micro-envelope core-shell structure flame retardant, which encapsulated ammonium polyphosphate into melamine-formaldehyde resin and sodium silicate through in situ polymerization was prepared with polyamide 6, added as a carbon-forming agent. The composition of ammonium polyphosphate, encapsulated ammonium polyphosphate with melamine-formaldehyde resin and the micro-envelope core-shell structure flame retardant were characterized. The fire safety and thermal stability were investigated and showed an improvement including limiting oxygen index, thermogravimetric analysis, vertical burning tests, and microscale combustion calorimeter. The burned compounds were also studied to confirm the burning mechanism. The results showed the flame retardant performance had been greatly improved, while polyamide 6 had better char-forming effect. Besides, the water solubility of flame retardants and their influence on the mechanical properties of polypropylene were also investigated. The results on the effects of additives demonstrated a high efficiency flame retardant to polypropylene. A core-shell flame retardant that sodium silicate and melamine-formaldehyde resin-coated ammonium polyphosphate had been constructed. The effect of the built flame retardant system on the combustion performance of polypropylene was studied from the mechanism and performance. The LOI of the most flame retardant polypropylene reached 28.6%, and UL-94 reached the V-0 level. 相似文献
13.
石墨填充聚丙烯的研究 总被引:7,自引:0,他引:7
着重对石墨填充聚丙烯的某些性能作了初步探讨了,除了提高该材料的力学性能外,其热传导性有了较大改善,从而扩大了其应用范围,可用于耐腐蚀设备、换热设备、贮存设备等领域,很有推广价值。 相似文献
14.
Qingbo Zhang Haitao Xing Caiying Sun Haiwang Xiang Dawei Jiang Linlin Qin 《应用聚合物科学杂志》2010,115(4):2170-2177
A novel intumescent flame retardant: tetra‐spirophosphoryl‐benzoguanamine (TSPB) containing three constituents was used as a new flame retardant for polypropylene to prepare flame‐retardant materials, whose flammability and thermal behavior were studied by the limited oxygen index (LOI), thermogravimetric analysis (TGA), in addition whose mechanical properties were investigated in this work. It was found that when the addition of TSPB was 25 wt %, the LOI value of the PP could achieve to 29.5 and pass the UL‐94 V‐0 rating test. The TGA data showed that TSPB could enhance the thermal stability of PP and effectively increase the char residue formation. The mechanical performance test showed that the addition of TSPB improve the mechanical performances of PP to some extent. Thus, the trinity intumescent flame retardant TSPB is good to modify PP. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010 相似文献
15.
16.
聚丙烯用阻燃剂及阻燃聚丙烯 总被引:27,自引:3,他引:27
详细介绍了聚丙烯的燃烧特征和目前采用的阻燃方法以及应用于聚丙烯的阻燃体系、阻燃性能、应用领域,并指出了阻燃聚丙烯的发展方向。随着人们安全意识的提高和法律法规的不断完善,相信阻燃聚丙烯将会有越来越广阔的市场。 相似文献
17.
18.
低密度及难燃低密度高回弹聚氨酯泡沫的研制 总被引:1,自引:0,他引:1
分别采用高活性聚醚多元醇和阻燃聚合物多元醇(TM-300)为主要原料,制备了低密度及难燃低密度高回弹泡沫.介绍了低密度高回弹泡沫的性能,讨论了TM-300的用量对难燃低密度高回弹泡沫性能的影响.结果表明,低密度高回弹泡沫密度可低至35 kg/m3,性能与一般密度高回弹聚氨酯泡沫相当;随着TM-300用量的增加,难燃低密度高回弹聚氨酯泡沫的硬度和拉伸强度增加,撕裂强度和伸长率下降;当TM-300用量为50份时,难燃低密度高回弹聚氨酯泡沫密度为40 kg/m3,氧指数达32,各项性能优于使用添加阻燃剂型泡沫. 相似文献