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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：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：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：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.

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

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：利用methoxysilyl一半的水解作用和冷凝作用，器官无机的混血儿(N-isopropylacrylamide-co-acrylamide-co-3-(trimethoxysilyl)propylmethacrylate)poly，P(NIPAM-co-AM-co-TMSPMA)microgels经由二个不同方法被准备。第一个方法是microgels是从crosslinkable的fabricated以后线性P(NIPAM-co-AM-co-TMSPMA)terpolymer在terpolymer的更低的批评答案温度(LCST)上面的水的答案。为第二个方法，microgels被常规表面活化剂直接综合NIPAM，AM，和TMSPMA的免费乳剂copolymerization。结果的P(NIPAM-co-AM-co-TMSPMA)microgels的水动力学直径和稳定性强烈取决于microgel的pH和温度水的答案。microgels的水动力学直径与增加测量温度减少了。microgels的阶段转变温度被发现在34附近吗？？

简介：Polymerizable离子的液体共聚物PMMA-co-BVIm-Br被激进的聚合技术综合，并且由Fourier变换描绘了红外线的spectrometryFTIR，<啜class=“a-plus-plus”>1H原子磁性的回声<啜class=“a-plus-plus”>1H-NMR和胶化浸透层析GPC。产生共聚物被用来经由一个阶段倒置方法准备polyvinylidene氟化物PVDF混合膜。多型性，表面wettability和混合膜的希腊语的第六个字母潜力上的共聚物的效果被ATR-FTIR，接触角度仪器和希腊语的第六个字母潜力分析器调查。扫描电子显微镜学SEM和SEMedition也被使用调查形态学和制作的膜的表面元素变化。结果显示那PMMA-co-BVIm-Br共聚物在让混合膜在试验性的pH范围期间有积极表面的膜的表面上存在。共聚物也赞成在PVDF膜的水晶阶段的形成。接触角度实验显示那PMMA-co-BVIm-Br共聚物能交换混合膜的wettability从对吸水由交换Br恐水病<啜class=“a-plus-plus”>有PF的阴离子<潜水艇class=“a-plus-plus”>6<啜class=“a-plus-plus”>。与纯PVDF膜相比，混合膜的水流动和水恢复流动显然被提高。从流动恢复比率FR和全部的犯规比率R的结果<潜水艇class=“a-plus-plus”>t都建议混合膜有好犯规反的性质。

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简介：Theefficiencyofthepoly（3-hexylthiophene）（P3HT）and[6,6]-phenylC61-butyricacidmethylester(PC61BM)basedorganicsolarcellswasenhancedbyusing1,2,4-trichlorobenzene（TCB）asaprocessingadditivetocontroltheblendmorphology.TheadditionofTCBimprovedthearrangementofP3HTwhichresultedingoodphaseseparatedblendfilms.Correspondingly,theoptimizedsolarcellsshowedapowerconversionefficiency（PCE）of4.17%withafillfactor（FF）of0.69,whichwerehigherthanthoseofcommonthermalannealingdevices（PCE3.84%,FF0.67）.Theefficiencywasfurtherimprovedto4.74%bythermalannealingat150°Cfor10minwithahigherFFof0.74.

简介：一个非水的暂停polycondensation方法被建议继续为准备的p-phenylenediamine和terephthaloyl氯化物的反应poly(p苯撑terephthalamide)(PPTA)。系统与NMP-CaCl被操作<潜水艇class=“a-plus-plus”>是的2答案驱散的阶段和是的惰性的液体石蜡连续阶段。每NMP-CaCl<潜水艇class=“a-plus-plus”>在石蜡推迟的2答案microdroplet用作polycondensation发生了的microreactor。根据TGA，XRD，红外，SEM和EA的结果，有好质量的PPTA通过这个新奇方法被获得，并且影响这个过程的很多个主要因素被调查为PPTA的准备决定最佳条件。而且，这个二阶段的polycondensation系统与常规解决方案polycondensation方法相比带给许多唯一的优点，包括使反应物离开氧和水的封上的反应环境，HCl到的容易的移动支持更少的精力花费了工具的反应，控制得好的温度和低粘性。

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简介：无论是以前的村民代表大会,还是现在的议事会,其面临的主要问题,都是如何解决决策权的虚设问题高仁天被逼着做了一次"官"。这个已经做了14年司机的邛崃市油榨乡马岩村农民,去年3月底被同组村民推举