高強度聚酰亞胺的合成與性能表征.pdf

1、分類號UDC密級編號學(xué)位論文高強度蒙酰亞胺的合成與性能表征SYNTHESISANDCHARACTERlzATIONOFHlGHSTRENGTHPOLYIMIDES黃超伯指導(dǎo)教師姓名：侯豪情教授江西師范大學(xué)化學(xué)化工學(xué)院申請學(xué)位級別：碩士專業(yè)名稱：高分子化學(xué)與物理論文提交日期：2006年5月論文答辯日期：2006年5月日學(xué)位授予單位和日期：江西師范大學(xué)2006年月日答辯委員會主席：評閱人：二oo六年五月高強度聚?；“返呐_成與性能表征‘Abs

2、tractThisdissenationconsistsoftwOp趾ts：Panone：Aseriesofhi曲m01ecIllar、veigIltpolyimide(P1)precursors，polyp—phenylenebiphenyltetracarbox鋤icacid)(BP—PAA)，Weresynmesizedfrom3，4，3’，4’biphenyltetrac￡Lrboxylicdianhydride(BPDA)鋤d

3、pphenylenediafnine(PDA)byusingintensemechanicaIstirringatthelowtempemtureThehighestintrinsicviscosity，76dL／g，、ⅣasmeasuredbyusingtheprecursorBPPAAsynthesizedintheconditionof1O％bywei曲treactingsubstancesinDMAca王ldat一5。cNano

4、fibersofpoly(p—phenylenebiphenyltetfacarboximide)(BP—PI)wasobtainedbyelectrospinningthesolutionofBP—PAAinDMAcandimidizingtheas—electeospunBP—PAAnanofibersTheaveragedi啪eterofthePInallofiberswasabout200mTheimidizationcondi

5、tionofconVertingBP—PAAintoBP—P1wasinveStigatedbyusingF1乙IRspectroscopeandbyestablishingrelationshipsbetweentheimidizingtempemtureaswelIasstayingtimeatdiⅡ’erenttemperatureafldthemechanicalperfo柵aIlceofPIfilmTheresultshowe

6、dmatwhenmolecularweighlwasnosignincantdi行eⅫlt，thehighertheimidizaljondegreeofBP—PAA，thcbettert11emecha|licalpe曲rnlanceoftheBPPIfilmWasThehi曲esttensilestrengthandmoduluswererespectively960MPaafld201GPaforBP—PIfilmand650MP

7、aandl5GPaforelectrospunBP—PIn鋤ofibermatsormembranesInaddition，ttleheatingresistanceoftheBP—P1wasmeasuredtobe5650Cinairand6030Cinnitrogenby5％bywei曲tdegradationD”鋤icmechanicalanaI”isof也ePIfilmsho、Ⅳedthatthe百asstransitionte

8、mperatureandstoragemoduJusofBPPIthinfilmswererespectiveIy330。Calldmoret11an18GPaParttWo：aseriesofsimilarhi眺molecularwci曲tPIprecursors，poly∞phenylenebiphenyltetracarbox鋤icco—oxydiphthaldicarboxamicacid)(BOP—coPAA)weresynm

9、esizedfrom3，4，3’，4’biphenyltetracarboxyIicdianhy出ide(BPDA)，4，4’一oxydiphthalica11hydride(ODP_A)aIldp—phenylenediamine(PDA)atlowte塒IperatureTheas—synthesizedPIprecurSorsolutionwasusedtomakeBOP—co—PIthinnImsbysolution—casta