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简介：一系列新包含硅(p-arylenevinylene)poly，有在主要的链的蒽单位的s(PAV)被hydrosilylation反应综合。有机硅单位的介绍改进了聚合物的溶解度，并且-聚合的链的变化形式被打断。这些聚合物在答案在0.280.30的范围在447499nm和量收益与他们的荧光最大值作为蓝绿色的轻emitters表现了。

简介：Thecopolymerizationofp-diethynylbenzene（PDEB）withphenylacetylene（PhA）,4,4’-diethynylbiphenyl（DEBP）orm-diethynylbenzene（MDEB）arestudiedbyvaryingmoleratiosofmonomers.WhenthemoleratiosofPDEB/PhAarelessorequalto1/5,thecopolymersaresolubleandfusible,buttheothercopolymersareinsolubleandinfusible.Theresultsshowthatthegoodsolventofcross-linkedcopolymersisbenzeneandtheirsolubilityparameteris9.15cal0.5.cm（-1.5）.Andtheirswellability（θp）,Hugginsparameter（χ）,density(d425)andtheaveragemolecularweightsbetweencrosslinks（c）aremeasured.Itisfoundthatθpandcofcopolymersaregreaterbutd425islessthanthatofrespectivehomopolymers.IRspectrashowthatthecopolymershavetransoidconfigurationandsmallnumberofunreactedethynylgroupsexistinthecopolymers.Themechanismaboutthepolymerizationoracetylenicderivativesinitiatedby（Ph3P）2PdCl2isdiscussed.

简介：Polyolefinsthatbearachiralsidechain(typicallyanisobutylgroup)experienceaso-calledmacromolecularamplificationofchirality:thechiralside-chaininducesaslightpreferenceforeithertgortg-mainchainconformation.Thisslightconformationalbiasisamplifiedcooperativelyalongthechain,andresultsinpreferredchiralityofthemainchainhelicalconformations.Asaresult,thesepolymersdisplayaliquid-crystal(LC)phasebothinsolutionand,inthemeltasatransientphaseonthewaytocrystallization.Theexistenceoftwoprocesses(melt-LCandLC-crystaltransitions)resultsinunconventionalbehaviorsthatwerefirstanalyzedbyPinoandcollaboratorsbackin1975.Thesepolymersalsoofferameanstotestthestructuralconsequencesofrecentlyintroducedcrystallizationschemes.Theseschemespostulatetheformationofatransientliquid-crystalphaseasageneralschemeforpolymercrystallization.

简介：Thestructureofpolyimidefrom1,4-bis(3’,4’-dicarboxyphenoxy)benzeneand4,4’-oxydianilinefilmspecimensbeforeandafterhotstretchinghasbeeninvestigatedbyWAXD,DSCandFTIR.AsevidencedbyboththeWAXDandDSCresults,itcouldbebelievedthatstraininducedcrystallizationdidtakeplaceafterhotstretching.Meanwhile,shiftingpositionandsplittingofsomebandpeaksexistedontheFTIRspectrogramswereexplainedintermsoftheclosepackingofchainsandthechangesofinter-molecularcharge-transferinteractionbetweenimidegroupsandaromaticgroupsuponcrystallization.

简介：由形成毛孔的代理人聚乙烯乙二醇(木钉)组成的各种各样的贯穿半的聚合物网络(semi-IPN)hydrogels，丙烯酸的酸(AA)和acrylamide(AM)被与一个二拍子的圆舞方法使用免费激进的聚合准备。综合hydrogels的化学结构被FTIR光谱学描绘，形态学被扫描电子显微镜学(SEM)学习方法。胀大的性质例如pH应答的行为，腌敏感，在有各种各样的pH价值的不同答案的摆动的swelling/de-swelling行为和在洗澡pH振荡器的自我震荡的行为详细被调查。当pH从3.0和7.0并且很好中等变化珍视时，结果表明准备hydrogels展出了高pH敏感和优秀的盐敏感由经历很多swelling/de-swelling的可逆性质再循环。特别地，hydrogels在包含兄弟的一个封闭系统展出了自激振荡行为3那么32Fe(CN)64H+。这研究可以为新自我走的致动器和另外的设备作为biomaterial创造新可能性。

简介：PPV－basedcopolymerswithcyanogroupinthemainchainhavebeensynthesizedbyWittig-typepolycondensationofalkoxy-substituteddialdehydesand4,4'-bis(cyanomethyl)-substituteddiphenylether:[-C6H4-O-C6H4-C(CN)=CH-C6H2(OR)2-C=C(CN)-]n(POPPV),Thecopolymersarehighlysolubleincommonsolventsandtheirsuperhighlytransparenthomogeneousthinfilmscanbeformedbyspincoatingdirectlywithoutheattreatment.ThechemicalstructuresaredeterminedbyNMRandIRspectroscopysandevaluatedusingphotoluminescence,gel-permeationchromatography(GPC)andDSC(orTGA)methods.TheincorporationofethergroupintothePPVbackbonehasaninterruptionofthemain-chainconjugation,thatresultsintheblue-shiftofelectroluminescencespectraandenhancemntthesolubility.

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简介：Poly（aryleneetherdiketone）swerepreparedbythearomaticnucleophilicdisplacementreactionof4,4’-difluorobenzilwithdifferentbisphenolsinthepresenceofan-hydrouspotassiumcarbonateindiphenylsulfoneatelevatedtemperature.Thepolymersobtainedhadinherentviscosityof0.51～0.63dL/g,andexhibitedglasstransitiontemper-aturerangingfrom136～217℃mainlydependingonthebisphenolsusedinthepolymersynthesis.Thermogravimetryofthesepolymersshowedexcellentthermalstability,indi-catingthat10%weightlossesofthepolymerswereobservedintherangeabove428℃and438℃inairandnitrogen,respectively.ThemechanicalpropertiesofthesepolymerswerealsodescribedandthepermeabilityoffivepolymersforH2,O2andN2wasdeterminedat30℃.

简介：Bythereactionofpoly(bromoacetylstyrene)(EBPS)withthiaurea(TU),akindofnovelchelatingresinwithheterocyaclicringofsulfurandnitrogen,poly[4-(2-amino)thiazoleyl-4-vinylben=ene],wassynthesized.ItsstructurewascharacterizedbyFTIRandelementalanalysis.Thefactorswhichhaveinfluenceonthereactionsuchasreactiontime,solvents,andmolarratioofreactantswereinvestigated.

简介：Acetylcrosslinkedpolystyrene(EPS)andcrosslinkedbromoacetylpolystyrene(BEPS)beadsweresynthesizedbyFridel-Craftsacetylationofpolystyrene(PS)andbrominationofEPSrespectively.FTIR,XPS,andTG-TDGwereemployedtocharacterizetheirstructures.TheresultsrevealedtherearetwotypesofbromineintheBEPSmolecule.Oneisinthemainchainofpolystyreneandtheotherisintheacetyl.TheresultsofTG-DTGshowedthattheratesoflossweightofPS,EPS,andBEPSwere92.7%,92.2%,and81.3%amongthe300℃～500℃;7.3%,7.8%,and18.7%in594℃,660℃,and584.8℃,respectively.

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简介：X-rayphotoelectronspectroscopy(XPS)wasadoptedtoelucidatesorptionmechanismofphenolandp-nitrophenolontoaweaklyanionexchangerD301.ThedistributionofspecificformsoftertiaryaminogrouponD301wasobtainedandeffectoffreetertiaryaminogrouponphenolsorptionontoD301wasdiscussed.TheresultindicatedthatthepercentoftheprotonatedtertiaryaminegrouponpolymericmatrixwasmuchlowerthanthereferencecompoundN,N-dimethylbenzylamineatanidenticalpHvalueinsolutionduetothemuchloweractivitydegreeofhydrogenionininnerresinphasethanintheexternalsolution.LessfreeaminogrouponD301resultsinlesssorptioncapacityofphenolandp-nitrophenolinanacidicsolution.UndertheexperimentalconditionsbothphenolsorptionontoD301canbeexplainedassolidextractionandthedistributioncoefficientvarieslinearlywiththecontentoffreeaminogrouponD301.

简介：ThepreparationofconductingPPQfilmwasfirstreportedinthepreviouspaper.Itisveryinterestingthatthisfilmishighlysensitivetomoistureinair.ThehydrationanddehydrationofthefilmareaccompaniedbychangenotonlyincolorbutalsoinconductivityandUV-visiblespectrum.TheconductingPPQisreducedtoPPQandlosesitsconductivityafterbeingsoakedinwater.

简介：Acomparisonoftheadsorptionofbenzoicacidandp-nitrobenzoicacidonthenewhypercrosslinkedpolymericadsorbentAM-I,withthatbymacroporousAmberliteXAD-4,includingtheequilibriumadsorptionisotherms,thedynamicadsorptionbehaviorsthroughcolumnandtheadsorptionthermodynamicswerestudied.ResultsshowthatFreundlichequationgivesafittingadsorptionisotherm.ThespecificsurfaceofAM-lisonly67%ofthatofAmberliteXAD-4,buttheadsorptioncapacitiesonAM-1aremuchhigherabout125%～166%thanthatonAmberliteXAD-4,whichiscontributedtothemicroporemechanismandpolarity.Thenegativevaluesoftheadsorptionenthalpyareindicativeofanexothermicprocess.Enthalpyandfreeenergychangesofadsorptionbothmanifestaphysic-sorptionprocess.Thenegativevaluesoftheadsorptionentropyindicatethattheadsorptioniswellconsistentwiththerestrictedmobilitiesandtheconfigurationsoftheadsorbedbenzoicacidmoleculesonthesurfaceofstudiedadsorbentswithsuperficialheterogeneity.Bothadsorbentswereusedinmini-columnexperimentsforadsorbingbenzoicacidexpectingtoelucidatethehigherbreakthroughadsorptioncapacityofthenewhypercrosslinkedpolymericadsorbentAM-1ascomparedwiththatofAmberliteXAD-4.

简介：Fluorescencepropertiesofaseriesofstyrene/p-divinylbenzene(St/p-DVB)copolymerbeadswereinvestigatedbysteady-statefluorescencespectra.Inadditiontothefluorescenceofthephenylringexcimer,anewemissionbandatca395nmappearswhenp-DVBcontentinfeedishigherthan13%(wt).Theintensityofthisnewemissionwasfoundtochangewithp-DVBcontentandtodecreasewithswollenbeads.Theoriginofthisnewemissionisconsideredtobeamulti-ringexcimerformation.

简介：小说芳香脂肪族(amide-imide)poly，在方面链在主要的链和氢氧根benzamide单位包含chiral单位的s从3,5-diamino-N-(4-hydroxyphenyl)的步生长聚合被获得了有不同chiral二酸氯化物(1a1e)的benzamide(2)。理论计算借助于计算化学方法被做叙述在反应下面的每二酸氯化物单体的稳定的符合构造和取向调节。这些聚合物被常规技术描绘。产生聚合物显示出好热稳定性。包括crystallinity，固有的粘性和词法特征的聚合物的另外的物理性质也被学习。

简介：Poly（β-carboxyethylmethylsiloxane）-LiClO4andpoly（β-alkoxylethylmethylsiloxane）-LiClO4crosslinkedfllmshavebeenprepared.Theionicconductivityofthefilmsdependsonthepolymerspecies,concentrationoflithiumperchlorate,temperatureandcontentofcrosslinkingagent.Theeffectofhighpolarorganicsolvent1,4-butyrolactoneontheionicconductivityandmechanicalpropertiesofpoly（β-carhoxyethylmethylsiloxane）-LiClO4systemwasalsoinvestignied.

简介：Ionicconductivityvaluesforsegmentedpolyetherpolyurethaneurea（PEUU）complexeswithLiClO4weredeterminedandvaluesashighas～1.1×10-4S·cm-1at353Kand～1.0×10-5S·cm-1at306Kwereachieved.TheionicconductivitydatawereanalyzedusingtheVTF（Vogel-Tamman-Fulcher）equationandWLF（Williams-Landel-Ferry）typeequation.Valueshavebeenestimatedforthe"apparent"activationenergiesofiontransportfromVTFequationandtheylieintherange2.70—5.53kJ·mol-1.