poss2fpa66纳米复合纤维的制备与性能分析

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1、奔季天学POSS／PA66纳米复合纤维的制备及性能研究STUDYoNTHEPREPARATIONANDPROPERTYOFPoSS／PA66NANO．COMPOSITEFIBERSABSTRACTPolyhexamethyleneadipamide(PA66)hasbeenmainlyusedinthemanufactureofadvancedsyntheticfiberandtirecordfabricofdiagonaltirewhichhasalreadybeenmanufacturedi

2、naconsiderablescaleinChina．Nevertheless，cateringtotherapiddevelopmentofeconomy,thecordwithimproveddryheatshrinkage，modulus，strengthandheatresistanceisbadlyneededbythetireindustry．Thecage-structuredPolyhedralOligomericSilsesquioxane(POSS)isanewtypeofo

3、rganic·inorganichybridmaterialswithmeritslike：intra—molecularheterostructure，nano—sizeeffect，highheatresistance，improvedmechanicalpropertiesofpolymers，etc．Combiningorganicphaseandinorganicphasewithcovalentbondsatthemolecularlevel，resultsinmaterialswi

4、thsignificantlyimprovedperformanceThisarticlechoseoctaphenylPOSS(OP—POSS)andoctavinylPOSS(OV-POSS)toreinforcePA66，respectively．ThepropertiesofPOSS／PA66nano·compositefiberspreparedbymeltspinning，forexample，thermalperformance，liquidity,crystallizationp

5、roperties，dryheatshrinkageandmechanicalperformance，werestudied．Theresultsshowedthat(1)Theinitialdecompositiontemperatureraisedabout10"(2with1wt％OP·POSS．WithafurtherincreaseinOP—POSScontenttherewasnosignificantchange．ThemolecularmobilityofPA66hasbeeni

6、mprovedbyOP-POSSwhichwastreatedasflowimprovingagent．(2)Thenon-isothermalcrystallizationprocessofOP—POSS／PA66nano—compositehasbeensuccessfullyexplainedbyMoZhishentheory．Coolingratestronglyaffectedthelengthofnon-isothermalcrystallizationduration．Moresp

7、ecifically，withtheincreaseofthecoolingrate，thecrystallizationratewasaccelerated，whichresultedintheshorteningofthetimetoreachthe牵季天学POSS／PA66纳米复合纤维的制备及性能研究crystallizationequilibriumvalue；thecrystallizationpeakshiftedtolowertemperatureanditswidthwidene

8、daswell(3)Thegrainsizesofphasesof丫I，O【lando,2ofOP—POSS／PA66nano—compositehadthetendencytobecomebiggerwiththeincreasingamountofOP·POSS(4)Withlwt％ofOP—POSS，thedryheatshrinkageofOP-POSS／PA66nano·compositedecreasedby16％，comparedtopurePA66fibers．Inadditio