無鹵阻燃聚乳酸的制備及其火災(zāi)危險性分析.pdf

1、西南交通大學(xué)碩士學(xué)位論文無鹵阻燃聚乳酸的制備及其火災(zāi)危險性分析姓名：古曲申請學(xué)位級別：碩士專業(yè)：消防工程指導(dǎo)教師：付永勝20100501西南交通大學(xué)碩士研究生學(xué)位論文第1I頁AbstractPolylacticacidisanon—petroleumbasedpolymerwidelysourceofrawmaterials，andhasgoodmechanicalpropertiesandphysicalproperties，suit

2、ableforblowmolding，hotformingandotherprocessingmethodsWiththedegreeofpolymerization(weight)ofthePLAisdifferent，it’SapplicationrangeisverywideItisexpectedtoreplacepolyvinylchloride(PVC)，polyethylenePropylene(PV)，polystyre

3、ne，polyesterandotherpolymermaterialsthatarepetroleumbasedandnon—biodegradable，andusedtoproduceplastics，film，fibermedicalsutureProductsTheapplicationisverypromisingInrecentyears，withtheexpansionofthescopeofitsapplication，

4、firehazardsareincreasingCarriesontheflameretardantmodificationandfirehazardresearchisbecomingmoreandmoreimportantFirst，thispaperpreparsflameretardantpolylacticacidcompositesadoptingPLAandhalogenfreeflameretardants(phosph

5、ate，ammoniumpolyphosphate，expandablegraphite)forsolutionmixingandbythewayofchangingtheratiobetweenflameretardantsandthePLAThroughtheoxygenindextest，theverticalburningtest，Smokedensitytest，westudiedflameretardantpropertie

6、sandfirerisk，ofpolylacticacidAlsoweAnalysflameretardantmechanismbyobservingthecharcoallayeraftercombustionusingScanningelectronmicroscopeTheresultsshowthatexpandablegraphitefireretardantonthepolylactideeffectisnotgood，be

7、causethatthePLAbetweentheexpandedgraphiteswellingupalreadymeltingwhentheexpandedgraphiteaftertheexpansion，SOitCannotCOVerupthesurfaceofpolylacticacid，whichfailtoflameretardanteffectThetwokindsofphosphorusflameretardant0n

8、thePLAhasgoodflame—retardanteffect，whileaddingmorethan8％，VOCanburnthroughtheverticallevel，inparticularWhentheTPPcontentis15％，itsoxygenindexisashighas386Howeverwiththeflameretardanteffectoftheincreaseinsmokedensityalsoinc

9、reased，whenthecontentis15％ofTPP’MSD(maxl。mumsmokedensity)isreached6433Second，aspolylacticacidintocarbonispooltheauthorexaminesaddingakindofSubstancethatnotonlytoincreaseitsmechanicalproperties，butalsoasacharringagentpoly

10、mermaterial—polycarbonate(PC)InordertodeterminewhetherthePCCanplaytheroleascarbonandincreasetheefficiencyofflameretardant，PCandresistancemeasuredbydifferentflameretardants(phosphate，ammoniumpolyphosphate)indifferentpropo

11、rtionsonthecombustionpropertiesofpolylacticacidTheresultsshowthattheadddingPCretardantpolylacticacid，callnotachievetheverticalcombustionV0levelduetothecombustionofmaterialswiththefireafterthedripandignitingabsorbentcotto