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1、N第4l卷,第8期工程塑料應用’2013年8月ENGINEERINGPL,ASTICSAPPLICATION:。o.;83doi:lO.3969/j.issn.1001-3539.2013.O8.019二烯丙基雙酚A改性醚酮結構雙馬來酰亞胺樹脂的研究曲春艷,趙立偉,王德志(黑龍江省科學院石油化學研究院,哈爾濱150040)摘要:用二烯丙基雙酚A(DABPA)對內增韌含醚酮結構的雙馬來酰亞胺樹脂fEK.BMI)進行改性,采用動態(tài)差示掃描量熱法、傅立葉變換紅外光譜法、Kissinger-Crane法和溫度一升溫速率外推法研究了EK.BMI/DABPA體系的固化動力學過程,并
2、研究了EK.BMI/DABPA體系的力學性能、斷裂韌性及熱穩(wěn)定性。結果表明,EK.BMI/DABPA體系的固化工藝參數(shù)為:165℃×2h+l80oC×2h+238℃×4h,后處理條件為250oC×5h,表觀活化能為97.50kJ/mol,頻率因子為2.22×10S一,反應級數(shù)為O.9328。EK.BMI/DABPA體系具有優(yōu)良的力學性能,拉伸強度和彎曲強度分別為89.42MPa和152MPa,其玻璃化轉變溫度為278~(3,在260~C時仍能保持良好的力學性能,其臨界應力強度因子和臨界應變能釋放率分別可達1.14MPa·1Tl0和276.6J/m,表現(xiàn)出較好的斷裂韌性。
3、此外,該體系還具有較好的熱穩(wěn)定性,體系的初始分解溫度為412.95℃(%),600qC時的質量保持率為37.91%,900~(2時的質量保持率為32.17%。,關鍵詞:雙馬來酰亞胺;固化動力學;力學性能;斷裂韌性;熱穩(wěn)定性中圖分類號:TQ323.7文獻標識碼:A文章編號:1001-3539(2013)08-0083-06StudyonBismaleimideResinContainingEtherandKetoneGroupsModifiedbyDiallylBisphenolAQuChunyan,ZhaoLiwei,WangDezhi(InstituteofPe~oc
4、hemistry,HeiLongJiangAcademyofScience,Harbin150040,China)Abstract:Akindofinternaltoughenedbismaleimidecontainingetherandketonegroups(EK-BMI)wasmodifiedbydiallylbisphenolA(DABPA).ThecuringkineticsprocessofEK—BMI/DABPAsystemwasinvestigatedbynon-isothermaldiferentialscanningcalorimetry,F(xiàn)our
5、iertransforminfraredspectroscopy,Kissinger-Craneandtemperature-heatingspeedextrapolation.Inaddition,mechanicalproperty,fracturetoughnessandthermostabilityofthesystemwerealsostudied.Theresultsshowthatthecuringtechnologyis165℃×2h+180oC×2h+238℃×4h.andthepost—processingtechnologyis250℃×5h.Th
6、eapparentactivationenergyis97.50kJ/molandfrequencyfactoris2.22×10Sandthecuringreactionorderis0.9328.Thecuredresinhasexcellentmechanicalproperty,thetensilestrengthandflexuralstrengthare89.42MPaand152MParespectively.Theglasstransitiontemperatureofthesystemis278oCandthesystemhasgoodmechanic
7、alpropertyupto260℃.Theplanstraincriticalstressintensityfactorandtheplanstraincriticalstrainenergyreleaserateofthesystemcouldreach1.14MPa’m0’and276.6J/m2respectively,whichmeanthatthesystemhasgoodfracturetoughness.Inaddition,thesystemhasgoodthermostability,andtheinitialdeco