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：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。

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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：我们在场这里周期的oligo(乙烯adipate)的第一合成经由有乙烯乙二醇的adipoyl氯化物的伪高度冲淡冷凝作用反应的s(COEA)，和合成相应poly(乙烯adipate)(豌豆)经由COEA的melt聚合。COEA的结构被1H-NMR和MALDI-TOF团大小。器官的底，反应温度和到COEA的收益上的乙烯乙二醇的adipoyl氯化物的比率的效果被学习，并且最佳反应条件被揭示。豌豆，二酸和diol基于半水晶的绿脂肪族的聚酯，被COEA的melt聚合用Ti综合(n-C4H9O)是的4是的催化剂和1,10-decanediol在200点的开始者在上到葡萄牙的语言的BPI在巴西说瞄准它的以后的用法在癌症病人生活测量疼痛的紧张和干扰。方法：BPI-B从原来的位／英寸被开发，用背翻译和委员会评论。背Translatio？

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简介：TheA-Bblockcopolymerof0634-chloroethylglycidyletherwithstyrenecanbegotbytheeasymethodofone-steppolymerization.ThestructureofA-Bblockcopolymerwasconfirmedbytheelementaryanalysis,turbiditytitration,molecularweightmeasurement,IR-spectra,13C-NMR,1H-NMRandDTAinvestigationoftheproducts.Also,theeffectsofsolvents,reactiontimeandtemperatureonthecomposition,Mnandyieldofcopolymerhavebeenstudied.

简介：Ithasbeenwellknownthatfluorinatedpolyurethanesexhibituniquelylowsurfaceenergy,biocompatibilityandbiostability,thermalandoxidativestabilityandnonstickingbehavior.Consequently,thesepolymershaveattractedconsiderableinterest.However,themechanicalpropertiesoffluorinatedpolyurethanesusuallydeclinewithincreasingfluorinecontents.Theblendingoffluorinatedpolyurethaneswithnormalpolyurethanewascarriedouttoachievebalancedmechanicalandsurfaceproperties.Itwasfoundthatpolyurethanewithgoodmechanicalpropertiesandlowsurfaceenergycanbeobtainedbyaddingasmallamountoffluorinatedpolyurethane.Thefluorinatedsidechainscaneasilymigratetouppermostsurfacesoftheblendsuntillthefluorinelevelatthesurfacebecomesalmostsaturated.Ithasbeenshownfromcontactangle,XPSandAFMmeasurementsthatonlyaslittleas0.34wt%offluorinelevelisenoughtoproduceasurfacesaturatedwithfluorine,andthefluorinelevelattheuppermostsurfaceisonehundredtimeshigherthanthatintheblendbulk.Thefinaloutersurfacestructuresofthepolyurethaneblendwereindependentofthecontentofthefluorinatedpolyurethaneintheblendsduetothesurfacessaturatedbyfluorine.

简介：Inthispaper,anewthin-layerion-exchangeresinphaseanalyticalmethodisintroduced.Itisbasedonthat,thebismuthouscationcanassociatewithiodicanions,soastoformedananioncomplex[BiI4-_]inastrongacidicenvironments.Thisanioncomplexcanalsoexchangeswithaweakeranionsonthesurfaceactivesiteofanionexchangeresin,sothata[R+][Bil4-]solidphasebinaryassociationalsystemisproduced.Owingtothesolidsystemisagreatmanydispersiveparticulates,itcanbepressedtoathin-layerbypresstoolsofthesocalled"thin-layerresinphase"or"resinphase",andusingthissolidassociationsystemspectrophotometryforthedeterminationoftracemetals.Soitcanincreasetheanalyticalsensitivity.Thisassociationsystemexhibitsmaximumabsorbanceat460nm,andobeysBeer'slawovertheconcentrationrange0.0lug/ml-l.20ug/mlofbismuthous(lll),hhasamolarabsorptivityof7.1×l^5[L/mol.cm].itindicatedtheresinphasespectrophotometryisasensitiveanalyticalmethodfortracebismuthous.Itis18timeshigherthanroutineaqueousspectrophotometry.Therelativestandarddeviationsis1.82%(n=6)fortheFfmeasurementsof0.Sug/mlBi(llO.ThedetectionlimitofBismuthous(lll)is1.4XlO~mol/L.ThemethodhasappliedtotheanalysisBi(lll)inenvironmentalwatersamples.

简介：Averymildandextremelyefficienthydrolysismethodfortransformationofpolystyrene-b-poly(tert-butylacrylate)(PS-b-PtBA)topolystyrene-b-poly(acrylicacid)(PS-b-PAA)wasdesignedandcarriedoutusingmoreconvenientandinexpensivechlorotrimethylsilane/sodiumiodideasreagents.Thehydrolysisproductcanself-assembleinaqueousmediatogiveregularmicelleswithPSblockformingthecoreandPAL4blockformingthecorona,orintetrahydrofuran(THF)togivereversemicelleswiththehydrophilicblockinthecore.

简介：Inthiswork,DSCandSEMstudiesindicatethation-ligandinteractioncanbeutilizedtoenhancetheinteractionofpoly(styrene-block-2-vinylpyridine)[P(S-b-2VP)]andpolyethylenebasedionomer(Surlyn).Thecompatibilityforthisblendingsystemcanbeimprovedbythisspecialinteractionand20/80wtistheoptimumblendingcompositionwithgoodcompatibility.FTIRresultsfurthercertifythatstronginteractionsexistintheblendingsystem.

简介：为综合的一条non-isocyanate线路有优秀热、机械的性质的热塑的聚氨酯被描述。与四个聚乙烯乙二醇木钉融化1,6-bishydroxyethyloxy羰基aminohexane的transurethanepolycondensation，即PEG400，PEG600，PEG1000，或PEG1500，在不同臼齿的比率被进行。有长木钉序列的一系列热塑的polyetherurethanesTPEU被准备。TPEU经由胶化浸透层析被描绘，FTIR，<啜class=“a-plus-plus”>1H-NMR，微分扫描热量测定，thermogravimetric分析，散布的宽角度的X光检查，和张力的测试。TPEU展览T<潜水艇class=“a-plus-plus”>在12.4汦灡之间的g？

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：Thehybridstructuresofpolystyrene-b-poly(ethyleneoxide)(PS-b-PEO)blockcopolymerandinorganicnanoparticleswithgoodstabilityandbiocompatibilityhavepotentialapplicationsindrugdeliveryandbioimaging.Sphericalco-assembliesofPS120-b-PEO318andoleylamine-cappedCdSquantumdots(QDs)areproducedsuccessfullyinthisworkbyaddingwatertoamixedcommonsolvent,suchasN,N-dimethylmethanamide(DMF)/chloroform,DMF/tetrahydrofuran(THF),orDMF/toluene.TheenergydispersiveX-ray(EDX)spectrumindicatesthatQDsarelocatedattheinterfacebetweenthecoreandshellofthesphericalco-assemblies.Theco-assemblyprocessduringwateradditionistracedbytransmissionelectronmicroscopy(TEM)andturbiditymeasurement.Sphericalco-assembliesareformedthroughbuddingfrombilayersoftheblockcopolymerandQDs.Themorphologyoftheco-assembliesisrelatedtothemiscibilityoftheQD-dispersingsolventswithwaterandthemorphologychangesfromasphericaltoavesicle-likestructurewithDMF/toluene.IncreasingTHFcontentinthemixedsolventcausesmorphologicaltransitionsfromsphericalco-assembliestomulti-branchedcylindersandmicelleswhereQDsarelocatedinthecentralcore.Increasingchloroformcontentyieldsvesicle-likestructureswithprotrudingrodsonthesurface.Themechanismofthemorphologicaltransitionsisalsodiscussedindetail.

简介：指向nano探查基于的一个可被细菌破坏的肿瘤poly(?-caprolactone)-b-poly(ethylene乙二醇)有磁性的回声成像(MRI)的块共聚物(PCL-b-PEG)micellefunctionalized对比代理人diethylenetriaminepentaacetic酸金轧(DTPA-Gd3+)在壳上并且一在红外线附近(NIR)在为磁性的回声和光双形式的成像的核心的染料是准备。纵的relaxivity(r1)PCL-b-PEGDTPA-Gd3+，micelle是13.4(mmol/L)?1s?1，DTPA-Gd3+的三褶层，并且比有类似的结构的许多聚合对比代理人的高。在里面忍受xenografted胸肿瘤的一只裸体老鼠的光成像显示出的vivo双形式的micelle优先地经由folic在肿瘤积累了由提高的渗透和保留(EPR)效果的调停酸的活跃指向和被动累积。结果显示dualmodalitymicelle是为癌症察觉和诊断的有希望的nano探查。

简介：Lamellarcrystalsofdiblock,triblockandfour-armpoly(ethyleneglycol)-b-poly(ε-caprolactone)(PEG-b-PCL)crystalline-crystallinecopolymersweresuccessfullyobtainedfromtheirsolution.Morphologyandstructureoflamellarcrystalsofcrystalline-crystallinecopolymerswereinvestigatedusingtapping-modeatomicforcemicroscopy(AFM)andselectedareaelectrondiffraction(SAED).Allofthesesamplesshowedthetruncated-lozengemultilayerbasalshapeswithcentralscrewdislocationorcentralstack,whichwereallobtainedsimultaneouslyfromtheoilbath.ThediffractionpatternofPEGblocklamellarcrystalisattributedtothe(120)diffractingplanesandthepatternofPCLblocklamellarcrystalisattributedtothe(110)diffractingplanesand(200)diffractingplanesaccordingtotheSAEDresults.Four(110)crystalgrowthplanesandtwo(200)crystalgrowthplanesarediscoveredforthePCLblocks,butthe(120)crystalgrowthplanesofPEGblocksarehidedinthefigureofAFM.Thecrystallinestructureofthefour-armcopolymers(FA)ismoredisorderandconfusedthanthatofthediblock(DI)copolymerandthestriatedfoldsurfacestructuresoflamellarcrystalsoffour-armcopolymers(FA)aresmootherthantheseoflinearanalogues,owingtotheconfusedcrystallizationofblockscausedbythemutualrestrictionofblocksandthehindranceofthedendriticcores.Inaddition,theaspectratioofFAisgreaterthanthatoftheothers.Itishypothesizedthattherearetworeasonsforthechangeofaspectratios.First,the(200)diffractingplanesofPCLcrystalsgrewslowlycomparedtotheir(110)diffractingplanesbecauseofdifferenceintheenergybarrier.Secondly,edgedislocationsonthe(200)diffractingplanesarealsoresponsibleforthevariationoftheaspectratio.Consequently,thecrystallinedefectsareaugmentedbythecompetingblockscrystallizedsimultaneouslyandthehindranceofthedendriticcores.

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.

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