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《低溫等離子體表面處理對(duì)uhmpe纖維復(fù)合材料性能的影響及測(cè)試》由會(huì)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(kù)。
1、重慶大學(xué)碩士學(xué)使論文中文摘要摘要超高模量聚乙烯(UHMPE)纖維化學(xué)上不活潑,表面能低,表面缺乏極性濺團(tuán),且超糍模量聚乙烯纖維是高度對(duì)稱的玨甲基結(jié)構(gòu),使德纖維具竅很高昀績(jī)晶度和取向度。這一方面保證英具有較高的力學(xué)強(qiáng)度,另~方面也使得纖維表筒的化學(xué)惰性特別突出,集中表現(xiàn)在與樹(shù)脂慕體制成復(fù)合材料后,界藤結(jié)合力很低。因此需對(duì)超贏模量聚乙烯纖維改往。本文主要研究了趣高模爨聚乙烯纖維經(jīng)低溫等離子表面處理后與環(huán)氧樹(shù)脂的糖緒瞧筢及冀該纖維簸合毒手瓣的各項(xiàng)力學(xué)往髓,并把UHMPE纖維和E.玻璃纖維混合制成復(fù)合材料進(jìn)行i貝4試。研究表明
2、:(1)經(jīng)低溫等離子體表面處理UHMPE纖維程襲瑟弓l入了含飄攝往鏊函,繹維表面被等離子體麴錘,與環(huán)戴樹(shù)膳穗合、機(jī)械鎖聯(lián)。拔出強(qiáng)度提高5倍左右;纖維強(qiáng)度損失10%左右。(2)UHMPE纖維經(jīng)等離子俸處瑾,對(duì)萁復(fù)合奉
3、辯靜控{串、彎趨戇筢影響不大;毽對(duì)層藺鷙切影確力,ILSS提高57%;抗沖擊性、極限應(yīng)交有所下降。(3)經(jīng)SEM觀察分析,低溫等離子侮裹瑟簸理UHMPE紓?cè)腊酒茐奶y先發(fā)黧在纖綞褒蒺,量磐留破壞;兩未處理的纖維發(fā)生在纖維與赫體的接觸面。(4)UHMPE纖維復(fù)合材料剛度低、韌性、彎蘧毪好,蒺輕;愆橫豢、篷強(qiáng)度與
4、&玻璃綞維屬羈一數(shù)量級(jí)。(5)UHMPE紓維與其它纖維混雜,彼此的物理力學(xué)性能在其復(fù)合材料中得到相互補(bǔ)充,混雜效應(yīng)提毫15%。(6)UHMPE紓縷復(fù)會(huì)耪睪尊缺蠡霹滋逶逡混合蒸它紓維瑟趣激克服。關(guān)鍵溺:超褰攘量聚忍爨◇燃疊E),表瑟箍璞,楚接強(qiáng)度,凌囂刻鏹,混雜終維復(fù)合材料,低溫等離予體重壅查蘭堡主堂焦堡奎莖塞塑墨ABSTRACTTheultrahi曲modulepolyethylene(UHMPE)fibrosisischemicallyinactivewithlowfunctiononitssurface.Itlac
5、ksactiveradicalonitssurface.Andultrahighmodulepolyethylenefiberishighiysymmetricalstructureofmethylene,whichmakesthefiberpossesseshighcrystallinityanddegreeoforientation.Ononehand,thisensurethatithasrelativelyhighstrengthintermsofmechanics;ontheotherhand,itmakes
6、theexternalchemicalinertnessofthefiberveryobvious,whichismainlyrepmsentedbythelowinterfacebindingforceafterthecolophonyplasmaismadeintocompositematerial.Soitisnecessarytomodifytheultrahighmodulepolyethylenefiber.Thispapermainlyresearchesintotheultrahi曲modulepoly
7、ethylenefibrosisbylowtemperatureplasmasurfacetreatmentandvariousstrengthfunctionofepoxycolophonycompositematerial,andmakestestsonthecompositematerialm酣efrommixingUHMPEfiberandE-glassfiber.Theresearchshows:(1)at&erintroducedoxygenpolarityradicalintotheUHMPEfibros
8、isbylowtemperatureplasmasurfacetreatmenLfibersurfaceisetchedbyplasma,andismechanicallylinkedtoopoxycolophony.Evulsionstrengthimprovesby5timesandthefiberstrengthloseby10%orso.(2)02-plasmatreatmentdidnotaffectthetensileandflexuralpmpertiesofUHMPEfibercompositesgre
9、atly(within10%),howeverincreasedtheinterlaminarshearstrength(ILSS)by57%.AndtheabilityofenergyabsorptioninimpacttestWasdecreasedalittleafter02-plasmatreatment.(3).SEMo