自然老化對膨脹阻燃LGFPP復合材料燃燒性能的影響
發(fā)布時間:2018-09-02 10:11
【摘要】:通過熔融共混法制備出膨脹阻燃長玻纖增強聚丙烯(LGFPP/IFR)復合材料,利用極限氧指數(shù)(LOI)測試、垂直燃燒測試、錐形量熱分析等表征手段研究了戶外自然條件下,不同自然老化時間對LGFPP/IFR復合材料燃燒性能的影響。結(jié)果顯示,在LGFPP/IFR復合材料的自然老化過程中,PP基體及IFR會發(fā)生降解,導致長時間老化后試樣的燃燒性能下降,但在老化初期阻燃劑的遷移效應依然占主導地位。當老化時間為6個月時,試樣的LOI達到最大值,為28.2%,其熱釋放速率峰值、總熱釋放量以及生煙速率均為最小值,表明復合體系的阻燃性能有所提高。掃描電子顯微鏡測試結(jié)果表明,試樣燃燒后形成炭層的致密性是影響復合體系燃燒性能的關(guān)鍵因素。
[Abstract]:Intumescent flame retardant long glass fiber reinforced polypropylene (LGFPP/IFR) composites were prepared by melt blending method. The outdoor natural conditions were studied by means of limiting oxygen index (LOI), vertical combustion and cone calorimetry. Effects of different natural aging time on the combustion properties of LGFPP/IFR composites. The results show that the degradation of PP matrix and IFR during natural aging of LGFPP/IFR composites leads to the degradation of the combustion properties of the composites after long aging, but the migration effect of flame retardants still dominates in the early aging period. When the aging time is 6 months, the LOI of the sample reaches the maximum value, which is 28.2.The peak value of heat release rate, total heat release and smoke generation rate are the minimum, which indicates that the flame retardant property of the composite system has been improved. The results of scanning electron microscopy (SEM) show that the compactness of the carbon layer formed after combustion is the key factor affecting the combustion performance of the composite system.
【作者單位】: 貴州大學材料與冶金學院;國家復合改性聚合物材料工程技術(shù)研究中心;
【基金】:貴州省高層次創(chuàng)新型人才培養(yǎng)項目(黔科合人才[2015]4039號) 貴州省優(yōu)秀青年科技人才培養(yǎng)對象項目(黔科合人字[2015]26號) 貴州省科技計劃項目(黔科合重大專項字[2015]6005號,黔科合成果[2016]4524號)
【分類號】:TB332
本文編號:2219044
[Abstract]:Intumescent flame retardant long glass fiber reinforced polypropylene (LGFPP/IFR) composites were prepared by melt blending method. The outdoor natural conditions were studied by means of limiting oxygen index (LOI), vertical combustion and cone calorimetry. Effects of different natural aging time on the combustion properties of LGFPP/IFR composites. The results show that the degradation of PP matrix and IFR during natural aging of LGFPP/IFR composites leads to the degradation of the combustion properties of the composites after long aging, but the migration effect of flame retardants still dominates in the early aging period. When the aging time is 6 months, the LOI of the sample reaches the maximum value, which is 28.2.The peak value of heat release rate, total heat release and smoke generation rate are the minimum, which indicates that the flame retardant property of the composite system has been improved. The results of scanning electron microscopy (SEM) show that the compactness of the carbon layer formed after combustion is the key factor affecting the combustion performance of the composite system.
【作者單位】: 貴州大學材料與冶金學院;國家復合改性聚合物材料工程技術(shù)研究中心;
【基金】:貴州省高層次創(chuàng)新型人才培養(yǎng)項目(黔科合人才[2015]4039號) 貴州省優(yōu)秀青年科技人才培養(yǎng)對象項目(黔科合人字[2015]26號) 貴州省科技計劃項目(黔科合重大專項字[2015]6005號,黔科合成果[2016]4524號)
【分類號】:TB332
【相似文獻】
相關(guān)期刊論文 前5條
1 王偉宏;王清文;張征明;;稻殼/聚乙烯復合材的自然老化與紫外光加速老化[J];林業(yè)科學;2008年08期
2 Matt McGreer;氣候及老化之因素[J];環(huán)境技術(shù);2001年06期
3 王偉宏;卜凡華;張征明;隋淑娟;五清文;;稻殼-聚乙烯復合材料經(jīng)歷自然老化后的性能變化(英文)[J];Journal of Forestry Research;2010年02期
4 李新功;鄭霞;吳義強;陳衛(wèi)民;凌啟飛;;竹纖維/聚乳酸復合材料自然老化性能研究[J];功能材料;2013年11期
5 ;[J];;年期
相關(guān)會議論文 前2條
1 許鳳和;李曉駿;陳新文;;復合材料自然老化與使用老化之間的關(guān)系[A];復合材料的現(xiàn)狀與發(fā)展——第十一屆全國復合材料學術(shù)會議論文集[C];2000年
2 秦煒;石光;林少全;周杰;;自然老化竹粉/回收聚乙烯復合材料吸水性研究[A];2009年全國高分子學術(shù)論文報告會論文摘要集(下冊)[C];2009年
,本文編號:2219044
本文鏈接:http://www.sikaile.net/kejilunwen/cailiaohuaxuelunwen/2219044.html
最近更新
教材專著