空心玻璃微珠对聚氨酯泡沫燃烧和力学性能的影响.pdf

《空心玻璃微珠对聚氨酯泡沫燃烧和力学性能的影响.pdf》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、第22卷第6期化学研究中国科技核心期刊2011年11月CHEMICALRESEARCHhxyj@henu．edu．cn空心玻璃微珠对聚氨酯泡沫燃烧和力学性能的影响陈伟红，杨迎，郭子东，徐晓楠，施智展(中国人民武装警察部队学院消防工程系，河北廊坊065000)摘要：通过向聚氨酯发泡体系中添加空心玻璃微珠，制备出空心玻璃微珠聚氨酯三相泡沫．研究了空心玻璃微珠添加量、聚磷酸铵(APP)用量、膨胀阻燃体系(IFR)浓度等因素对聚氨酯泡沫燃烧和力学性能的影响．结果表明，单独添加空心玻璃微珠对聚氨酯泡沫的氧指数和水平燃烧速度影响不大．添加APP或IFR后，空心玻璃微珠聚氨酯三相泡沫的阻燃效果显著改善，且

2、IFR对聚氨酯三相泡沫阻燃性能的改善效果优于APP．当同时添加2O的IFR和20的空心玻璃微珠时，氧指数值可达24．9，比聚氨酯泡沫的高36．8；水平燃烧速度可降至302．6mm／rnin，比聚氨酯泡沫的低38．8．与此同时，添加空心玻璃微珠改变聚氨酯泡沫的应力应变过程．当压力低于临界值时，应变随压力增大而缓慢增加；而当压力超过临界值后，应变随压力增大而迅速增加．关键词：空心玻璃微珠；聚氨酯三相泡沫；燃烧性能；力学性能中图分类号：U214．45文献标志码：A文章编号：1008～1011《2011)06—0068—04Effectofhollowglassmicrosphereoncombus

3、tionbehaviorandmechanicalpropertiesofpolyurethanefoamCHENWei—hong，YANGYing，GUOZi—dong，XUXiao—nan，SHIZhi—zhan(DepartmentofFireProtectionEngineering，ChinesePeople~"ArmedPoliceAcademy，Langfang065000，Hebei，China)Abstract：Three—phasepolyurethanefoamwaspreparedbydopinghollowglassmicrospheresintothefoamof

4、polyurethane．Theoxygenindex，horizontalburningrateandstrain—stresspa—rametersofthree—phasepolyurethanefoamwereinvestigated．Theeffectsoftheamountofhol-lowglassmicrospheres，dosageofammoniumpolyphosphate(APP)andconcentrationofintu—mescentflameretardant(IFR)onthecombustionbehaviorandmechanicalproperties

5、ofthethree—phasepolyurethanefoamwerestudied．Resultsshowedthatdopinghollowglassmicro—sphereledtoslightvariationintheoxygenindexandhorizontalburningrateofas—preparedpol—yurethanefoam．TheintroductionofAPPorIFRhelpedtosignificantlyimprovetheflame—re—tardingperformanceoftheas—preparedpolyurethanefoam，an

6、dIFRwassuperiortoAPPinim—provingtheflame—retardingperformanceofthefoam．Theoxygenindexofthepolyurethanefoamroseto24．9(higherthanthatoftheundopedfoamby36．8)anditshorizontalburningratedeclinedto302．6mm／min(1owerthanthatofundopedfoamby38．8％)whenhollowglassmicrospereandIFRweresimultaneouslyaddedatamassf

7、ractionof2O．Inthemean—time，dopinghollowglassmicrospereledtochangesinthestress—strainprocessofas—preparedpolyurethanefoam．Belowthecriticalvalueofpressure，thestrainofthethree—phasefoamslowlyrosewithincreasing