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1、VolA2.No.1第42卷,第1期工程塑料應(yīng)用l1220l4年1月ENGIN[EERINrGPLSTICSA~PPLICATIONJan.2014doi:10.3969/j.issn.1001·3539.2014.O1.024DI,D胰的制備及EP/月交囊復(fù)合l木才。料的力學(xué)性能古洪曉東,秦昌強(qiáng),趙娜,梁兵f1.遼寧工程技術(shù)大學(xué)材料學(xué)院,遼寧阜新123000;2.沈陽(yáng)化工大學(xué)材料學(xué)院,沈陽(yáng)110142)摘要:采用原位聚合法,以脲醛樹(shù)脂和密胺樹(shù)脂預(yù)聚體為殼材、雙環(huán)戊二烯(DCPD)為芯材,制備了兩
2、種DCPD微膠囊。通過(guò)掃描電子顯微鏡、傅里葉變換紅外光譜l3FTIRI)對(duì)微膠囊進(jìn)行了表征,并將其添加到環(huán)氧樹(shù)脂(EP)中測(cè)試復(fù)合材料的力學(xué)性能。結(jié)果表明,脲醛樹(shù)脂包覆DCPD微膠囊呈球形,粒徑為40~80m,壁厚為1~2m;密胺樹(shù)脂包覆DCPD微膠囊顆粒分布不規(guī)則,粒徑為15~20m,壁厚為2~5m。兩種微膠囊的FTIR譜圖除了具有殼材料脲醛樹(shù)脂和密胺樹(shù)脂的特征峰外,在1251,3051cm處均有芯材DCPD的特征峰,證明DCPD芯材已被兩種殼材料成功包覆。隨著微膠囊用量的增加,EP/微膠囊復(fù)合
3、材料的拉伸強(qiáng)度和沖擊強(qiáng)度均呈先增大后減小的趨勢(shì),拉伸強(qiáng)度和沖擊強(qiáng)度分別在微膠囊質(zhì)量分?jǐn)?shù)分別為15%和10%時(shí)達(dá)到最大值,在相同條件下,加入密胺樹(shù)脂包覆DCPD的復(fù)合材料的力學(xué)性能明顯好于加入脲醛樹(shù)脂包覆DCPD微膠囊的復(fù)合材料。關(guān)鍵詞:自修復(fù);微膠囊;環(huán)氧樹(shù)脂;力學(xué)性能中圖分類號(hào):TQ317文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1001—3539(2014)01.一0112--04PreparationofDicycl0pentadieneMicrocapsulesandMechanicalProperties
4、ofEpoxy/MicrocapsulesCompositesHongXiaodong,QinChangqiang,ZhaoNa,LiangBingf1.CollegeofMaterialsScienceandEngineering,LiaoningTechnicalUniversity,F(xiàn)uxin123000,China;2.CollegeofMaterials,ShenyangUniversityofChemicalTechnology,Shenyang110142,ChinaJ)Abstra
5、ct:Twodicyclopentadiene(DCPD)microcapsuleswerepreparedwiththesheHmaterialofurea.。formaldehyderesinormelamineresinandthecorematerialofDCP。Dbyin.situpolymerization.Themicrocapsuleswerecharacterizedbyscanningelectronmicroscopyandfouriertransforminfrareds
6、pectroscopy(FTIR),themicrocapsuleswereaddingintoepoxyresinandthemechanicalpropertiesweretested.Resultsshowthaturea.formaldehyderesincladdingDCPDmicrocapsulesarespherical,particlesizeis40~80m,wallthicknessis1~2m.MelamineresincladdingDCPDmicrocapsulesdi
7、sperseirregularly,particlesizeis15~20m,wallthicknessis2~5m.FTIRspectrumoftwomicrocapsulesshowthecharacteristicpeakofurea-.formaldehyderesinandmelamineresinareexistedandthecharacteristicpeaksin1251cm~.3051cm~areexistedalso,whichprovethecoreDCPDcladding
8、withtwotargetshellmaterialssuccessfully.Withanincreaseofmicrocapsulescontent,thetensilestrengthandimpactstrengthofepoxyresin/microcapsulescompositesincreasefirstlyandthendecrease,themaximumvaluesoftensilestrengthandimpactstrengthreachwhenthema