免费在线亚洲,国产亚洲电影,在线一区二区三区视频

THERMAL STABILITY AND FIRE BEHAVIOR OF POLYURETHANE NANOCOMPOSITE FOAMS: SYNERGISM BETWEEN HALOGEN FREE FLAME RETARDANT AND DIPHOSPHONIUM MODIFIED CLAY

資料類型：

PDF文件

關鍵詞：

資料大小：

381K

所屬學科：

分子表征

來源：

2008納米填充阻燃聚合物及復合材料國際學術研討會（10.16-10.17，北京）

簡介：

Synergyinflameretardancyofrigidpolyurethanefoamsbetweenphosphorus-basedflameretardant(aluminiumphosphinate)andlayeredsilicateshasbeeninvestigated.Weusedpristinemontmorilloniteaswellasammoniummodifiedclay(commerciallyavailable)anddiphosphoniummodifiedclay,whichwassynthesisedbytheintercalationofthequaternarydiphosphoniumsalt.ThemorphologyofthefoamswerecharacterisedthroughSEM(ScanningElectronMicroscopy)andX-Raydiffraction(XRD),whilethermalpropertieswerecharacterisedbythermo-gravimetricanalyses(TGA),oxygenindextest(LOI)andconecalorimeter(CC).Themorphologicalcharacterisationshowedthatpristineanddiphosphoniummodifiedclaysarealmostslightlyintercalated,whileammoniummodifiedoneisverywelldispersed.Theresultsofthermalcharacterisationshowedthatinpresenceofphosphinateenhancementsofoxygenindex,firebehaviour(measuredbyconecalorimeter)andthermalstabilityhavebeenachieved.Phosphinateisthereforeanefficientflameretardantforpolyurethanefoamsanditsflameretardancyactiontakesplaceinbothcondensedandgasphases.Pristineandammoniummodifiedlayeredsilicatebringtosomeenhancementsofthermalstabilitywhilehavenoimportanteffectindecreasingpeakheatreleaserate(PHRR)andtotalheatevolved(THE)whenusedinconjunctionwithphosphinate;theirmainadvantageisrelatedtotheenhancementofcompactnessofthecharlayerformed.Diphosphoniumclayisinsteadeffectiveinfurtherimprovingthefirebehaviourofthefoamsbecauseoftheflameretardancyactionofphosphonium:bothPHRRandTHEweredecreased.Theanalysisofconecalorimeterdatashowedthatclaysactthroughphysicaleffectconstitutingabarrieratthesurfacewhichiseffectiveinpreventingorloweringdownthediffusionofvolatilesandoxygen,whilephosphinateandphosphoniumaremoreeffectiveowingtotheircombinedactioninbothcondensedandgasphase.

作者：

M. Modesti, A. Lorenzetti, S. Besco, D. Hrelja, M. Roso

上傳時間：

2009-02-17 14:13:31

下載次數(shù)：

消耗積分：

立即下載：

好

5人

中

1人

差

1人

友情提示：下載后對該資源進行評論，即可獎勵2分。

報告錯誤：

1.下載無效　 2. 資料明顯無價值　 3. 資料重復存在

相關評論 共有4人發(fā)表評論

更多評論

navy608 2010-11-29 14:09:31

好東西，謝謝了

jojoo 2009-10-07 9:23:36

thanks

yehlongy 2009-06-24 10:50:53

好東西謝謝了

gl-xu 2009-03-03 20:13:24

現(xiàn)在已經(jīng)工業(yè)化了嗎

你還沒有登錄，無法發(fā)表評論，請首先

免責聲明：本站部分資源由網(wǎng)友推薦，來自互聯(lián)網(wǎng)，版權屬于原版權人，如果不慎侵犯到您的權利，敬請告知，我們會在第一時間撤除。本站中各網(wǎng)友的評論只代表其個人觀點，不代表本站同意其觀點。

最新上傳資料
·	THE RESEARCH AND DEVELOPM...
·	POSS AS FIRE RETARDANTS
·	COMBUSTION AND CHARRING O...
·	ROLE OF NANOPARTICLES AS ...
·	STUDIES ON FLAME RETARDAN...
·	LAYERED DOUBLE HYDROXIDE ...
·	ASSESSING FIRE BEHAVIOUR ...
·	EFFECTS OF METAL OXIDES I...
·	STRUCTURE OF THE CONDENSE...
·	APPLICATION OF A NUMERICA...
·	CATALYTIC CARBONIZATION F...
·	COMBUSTION AND THERMAL BE...
·	STUDY ON THE FLAMMABILITY...
更多>>

熱點資料
·	A NEW NON-HALOGEN FLAME-R...
·	SELF-ASSEMBLY OF ALIGNED ...
·	COMBUSTION AND CHARRING O...
·	POSS AS FIRE RETARDANTS
·	STUDY ON THE PYROLYSIS ME...
·	AMMONIUM POLYPHOSPHATE/MO...
·	SYNERGISTIC EFFECT OF SEB...
·	A TGA/FTIR STUDY ON THE FL...
·	THERMAL STABILITY AND FIR...
·	EFFECTS OF METAL OXIDES I...
·	MICROENCAPSULATED HALOGEN...
·	THE EFFECT OF OMMT IN INT...
·	THE EFFECTS OF FIRE RETAR...
更多>>

相關資料
·	丁苯橡膠生膠抗氧效果的熱分析方...
·	填料類型對天然橡膠復合材料裂紋...
·	離心紡絲制備聚偏氟乙烯納米纖維
·	通過加入超細全硫化粉末橡膠大幅...
·	PBS/PLA高阻隔全降解薄膜的結...
·	通過隔離結構制備高導熱高分子復...
·	流動誘導結晶中反常的長鏈結構依...
更多>>

国产精品igao视频网网址不卡日韩,亚洲综合在线电影,亚洲婷婷丁香,黄色在线网站噜噜噜