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1、VolA2.No.1第42卷,第1期工程塑料應用l1220l4年1月ENGIN[EERINrGPLSTICSA~PPLICATIONJan.2014doi:10.3969/j.issn.1001·3539.2014.O1.024DI,D胰的制備及EP/月交囊復合l木才。料的力學性能古洪曉東,秦昌強,趙娜,梁兵f1.遼寧工程技術(shù)大學材料學院,遼寧阜新123000;2.沈陽化工大學材料學院,沈陽110142)摘要:采用原位聚合法,以脲醛樹脂和密胺樹脂預聚體為殼材、雙環(huán)戊二烯(DCPD)為芯材,制備了兩種DCPD微膠囊。通過掃描電子顯微鏡、傅里葉變
2、換紅外光譜l3FTIRI)對微膠囊進行了表征,并將其添加到環(huán)氧樹脂(EP)中測試復合材料的力學性能。結(jié)果表明,脲醛樹脂包覆DCPD微膠囊呈球形,粒徑為40~80m,壁厚為1~2m;密胺樹脂包覆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脂和密胺樹脂的特征峰外,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/微膠囊復合材料的拉伸強度和沖擊強度均呈先增大后減小的趨勢,拉伸強度和沖擊強度分別在微膠囊質(zhì)量分數(shù)分別為
3、15%和10%時達到最大值,在相同條件下,加入密胺樹脂包覆DCPD的復合材料的力學性能明顯好于加入脲醛樹脂包覆DCPD微膠囊的復合材料。關(guān)鍵詞:自修復;微膠囊;環(huán)氧樹脂;力學性能中圖分類號:TQ317文獻標識碼:A文章編號:1001—3539(2014)01.一0112--04PreparationofDicycl0pentadieneMicrocapsulesandMechanicalPropertiesofEpoxy/MicrocapsulesCompositesHongXiaodong,QinChangqiang,ZhaoNa,Lian
4、gBingf1.CollegeofMaterialsScienceandEngineering,LiaoningTechnicalUniversity,F(xiàn)uxin123000,China;2.CollegeofMaterials,ShenyangUniversityofChemicalTechnology,Shenyang110142,ChinaJ)Abstract:Twodicyclopentadiene(DCPD)microcapsuleswerepreparedwiththesheHmaterialofurea.。formaldehyd
5、eresinormelamineresinandthecorematerialofDCP。Dbyin.situpolymerization.Themicrocapsuleswerecharacterizedbyscanningelectronmicroscopyandfouriertransforminfraredspectroscopy(FTIR),themicrocapsuleswereaddingintoepoxyresinandthemechanicalpropertiesweretested.Resultsshowthaturea.
6、formaldehyderesincladdingDCPDmicrocapsulesarespherical,particlesizeis40~80m,wallthicknessis1~2m.MelamineresincladdingDCPDmicrocapsulesdisperseirregularly,particlesizeis15~20m,wallthicknessis2~5m.FTIRspectrumoftwomicrocapsulesshowthecharacteristicpeakofurea-.formaldehyderesi
7、nandmelamineresinareexistedandthecharacteristicpeaksin1251cm~.3051cm~areexistedalso,whichprovethecoreDCPDcladdingwithtwotargetshellmaterialssuccessfully.Withanincreaseofmicrocapsulescontent,thetensilestrengthandimpactstrengthofepoxyresin/microcapsulescompositesincreasefirst
8、lyandthendecrease,themaximumvaluesoftensilestrengthandimpactstrengthreachwhenthema