含氮杂环结构溶致液晶聚芳酰胺的合成和性能

1、(,1160121,22(444(41,., 1.763.29dL/g;,;(312351;10%513534;,N/ N,N/.,TB3241005-3093(200704-0359-05Preparation and properties of novel lyotropic liquid crystalline copolyamides containing phthalazinone moietyLIU Pengtao WANG Jinyan WU Chunrui JIAN Xigao(Department of Polymer Science&Materials,Dalian

2、 University of Technology,KEY WORDS organic polymer materials,lyotropic liquid crystalline,copolyamides,phthalazinone,1,2.Kevlar R(,PPTA,3,4.*2003AA33G030. 2006627;20061215.:,58,911.PPTA,.191,22(444(4360211(DHPZDA.:(PPD(,(TPC(,N(NMP(,CaH2, (Py(,CaH2,LiCl(, 1803h.N2DHPZDA PPD LiCl Py NMP N2,TPC, N26h

3、400mL(1:1,12h,12024h,.0.02g1mL,7d,;Nicolet20DXB FTIR;DSC TGA Netzsch204Netzsch209,N2,20/min;Rigaku D/max2400XWXRD,Niltered CuK,4/min;,100%H2SO4NMP(1%LiClDMAc(1%LiCl, Olympus BH2.22.112,(1,inh1.763.29dL/g,1.(2a,3300cm1NH;1649cm1,;1606cm1C=N;13101210cm1;1113 cm1NN.,.,X(2b.,.,PPTA,., 1Fig.1The structur

4、e of the polyamides1Table1Physical properties and solubility of the copolyamidesMonomer ratioainh /Solubility cPolymerDHPZDA/PPD dL·g1ColorNMP NMP/LiCl d DMAc DMAc/LiCl d Conc.H2SO4P802080/20 1.76White+ P604060/40 2.53White+ P505050/50 2.67White+ P406040/60 3.17Yellow+ P208020/80 3.29b Yellow+a

5、.Determined at a concentration of0.5g/dL in NMP(1%LiClat25;b.Determined at a concentration of0.5g/dL in conc.H2SO4at25;c.+:Soluble at room temperature;+:partially soluble;:insoluble;d.Solvent containing1%LiCl2:3612XFig.2FT IR spectra(aand WAXD patterns(bof polyamidesDHPZDA,.2.20.02g1mL,7d,(1.1,.,.,.

6、P2080,PPD,.,.P4060,P5050,P6040,. P8020,.,Kevlar.2.3DSC TGA,2.,T g312351,T d(5%491513,T d(10% 513534,.,.,100%H2SO4NMP(1%LiCl DMAc(1%LiCl,.,.2Table2Thermal properties of the polyamidesPolymer T g/T d(5%/T d(10%/C y/%a P802032149151362 P604031250652656 P505033449951652 P406035150452054 P2080b51353456a.

7、Char yield calculated as the percentage of solid residue after heating from200to800in N2;b.Not detected.362213Fig.3Polaroptical micrographs of copolyamide solutions(aP6040at5wt%in DMAc/LiCl(1% solution;(bP5050at28%in conc.H2SO4solution3Table3Critical concentration values of the polyamidesC/%PolymerC

8、onc.H2SO4NMP/1%LiCl NMP DMAc/1%LiClP8020a212020P60403010ND b10P5050278ND7P4060236ND6P208022ND ND NDa.Lyotropic LC phase was not available under the test condition.b.Not determined for the limited solubility.,13,14:,;.,:., .3 .,C(3.,C.,C.,15.,.3,.,.,T g310,N210%510.,H2SO4NMP/LiCl DMAc/LiCl.2:3635Ziyi

9、 Ge,Shiyong Yang,Zhiqiang Tao,Jingang Liu,Lin Fan,Synthesis and characterization of novel solubleu-orinated aromatic polyamides derived fromuorinated isophthaloyl dichlorides and aromatic diamines,Polymer, 45(11,3627(2004Polym.Chem.,42(10,2377(20047DerJang Liaw,FengChyuan Chang,ManKit Leung High the

10、rmal stability and rigid rod of novel organosolu-ble polyimides and polyamides based on bulky and non-coplanar naphthalenebiphenyldiamine,Macromolecules, 38(9,4024(20058Shahram MehdipourAtaei,Yaghoub SarraW,Mehdi Hatami,Naphthalenering containing diamine and result-ing thermally stable polyamides,European Polymer Jour-nal,41(12,2887(2005(,26(3,558(200512 B.Tamami,H.Yeganeh,Synthesis and properties of13Pradip K.Bhowmik,Abul H.Molla,Haesook Han, Lyotropic liquid crystalline mainchain viologen poly-me