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《聚苯撐苯并二噁唑改性聚合物(dhpbo)的制備及結(jié)構(gòu)性能研究-材料加工工程專業(yè)畢業(yè)論文》由會員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫。
1、東華大學(xué)碩士學(xué)位論文摘要DHPBO一50%纖維/環(huán)氧樹脂的界面剪切強(qiáng)度(IFSS)與PBO纖維/環(huán)氧樹脂(IFSS二9.69MPa)相比，分別提高了71.73%、92.55%、77.85和56.33%，達(dá)到了16.83MPa、18.87MPa、17.43MPa及15.32MPa。復(fù)合材料破壞形貌的SEM分析也顯示出纖維界面粘結(jié)性能明顯改善，由原來界面破壞變成復(fù)合材料基體的部分破壞。單纖維壓縮彎曲試驗(yàn)顯示出DHPBO纖維的壓縮彎曲性能也得到了明顯改善?？疾炝薖BO、DHPBO纖維在紫外加速老化條件下的紫外穩(wěn)定性能。DHPBO纖維在紫外照射41
2、2小時后的強(qiáng)度保持率為74.0%，而PBO纖維為35.9%，紫外穩(wěn)定性能得到明顯的改善。關(guān)鍵詞:PBO纖維，輕基基團(tuán)，DHPBO纖維，表面性能，界面剪切強(qiáng)度，紫外穩(wěn)定性東華大學(xué)碩士學(xué)位論文ABSTRACTSynthesis，StruetureandProPertiesofModifiedPoly(P一Phenylenebenzoxazole)(DHPBO)ABSTRACTPoly(P一Phenylenebenzobisoxzole)(PBO)fibereanbewidelyusedinadvaneedeomPositesduetoitsex
3、eellenttensilestrength，modulus，thermalresistaneeandflameretardantProPerties.However，theinterfaeialadhesionbetweenPBOfiberandresinmatrix15notsuffieientforPraetiealuses.ThePooradhesion15generallytheresultoftheehemieallyinaetivesurfaeeand/orsmoothsurfaeeofPBOfiber.Inaddition，
4、PBOhaslowereomPressivestrengthandPoorresistaneetoultravioletradiation.Thereforeit15veryimPortanitoimProvetheadhensiveandantiultravioletProPerties.InthisthesishydroxylgrouPswasiniroducedtoPBOmoleeularehaintoimProveitssurfaeeProPertyandcomPressivestrength.Inthisstudy，dihydro
5、xyPBO(DHPBO)eontaininghydroxylgrouPsinmacromolecularchainswasobtainedbyeo一Polymerizationfrom4，6刁iaminoresorcinoldihydroehloride(DAR)andterePhthalieaeid(TPA)，withadditionofeertainamounisofZ，5一DihydroxyterePhthalicacid(DHTA)inrePlaeeofTPAinPolyPhosPhoricaeid(PPA).TheFT-IRand
6、elemenianalysisresultsshowedthatDHTAwasineorporatedintoPolymerehains.DHPBOfiberwassPunviadry一etandwet一sPinningteehnique，andthemeehanicalProPerty，thermalProPertyandaggregatingstruetureofthefiberwereinvestigated.ThetensilestrengthofDHPBO一5%fiberandDHPBO一10%fiberweres，24GPaan
7、d5.05GParesPeetively.TheaggregatingstruetureofDHPBOwasaffeetedbytheintroduetionofhydroxylgrouPs.However，theerystallinityofDHPBOfiberwasehangedalittle.ThethermalstabilityofDHPBOfiberwasexeellentandthedeeomPositiontemPeraturewasabout667oCinnitrogenatmosPhere.Thesurfaeesofthe
8、fiberswereearefullyanalyzedandquantified.Theeontactanglesbetweenfiberandwater/ethylaleoho
