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

简介：Newmodelcompound1H,1′H-Bis（benz-Δ^4-imidazoline)2,2′-spiro-titaniumdichloridewaspreparedandthestructureofthecompoundwasdeterminedby1R,MSandelementaryanalysis.

简介：Opticallyactive(R)-(+)-2,2’-bis(2-trifluoro-4-aminophenoxy)-1,1’-binaphthylwaspreparedfrom1,1’-bi-2-naphthol.Theopticallyactivearomaticpolyimidewasalsosuccessfullysynthesized.Thisnewpolymerhasgoodsolubility,thermalstabilityetc.Itsspecificrotationwasfoundtobe+174°,anditschiropticalpropertywasalsostudied.

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简介：Polymer-supportedRCpCpTiCl2(Cp=η^5-C5H4;RCp=η^5-RC5H4)havebeenpreparedandreducedbyi-C3H7MgBrinsitu，thenusedincatalyticisomerizationof1,5-hexadiene.Theisomerizationof1,5-hexadieneleadstoamixtureofcyclicandlinearproducts.Theratioofcyclictolinearproductdependsonthenatureofthesupporterandthesubstituentonthecyclopentadienylring.Theformercontributesthemost,forexample,silicasupportedCp2TiCl2gavecyclic-linearratioof99/1,whileforpolymer-supportedCp2TiCl2species,linearcompoundsarethemajorproductsandtheratioofcyclictolinearproductchangeswithdifferentRgroupsonthecyclopentadienylring.

简介：Thetreatmentandresourcereuseof1,2,4-acidproducingwastewaterbyself-mademacroporousadsorptionresinND,A-107wasstudiedinthispaper.Optimumadsorptionanddesorptionprocessparameterswereacquiredbysystematicallystudy.ThepolymericresinNDA-107indicatedgoodadsorption&desorptionof1,2,4-acidinthewastewater.Theremovalefficiencyof1,2,4-acid,CODerisabout78%,72%respectively.Itisevidentthatthisadsorptionprocessisanefficienttreatmentmethodfor1,2,4-acidproducingwastewater.Atthesametime,theaccumulationandresourcereuseofl,2,4-acidcanberealizedinthisprocess.

简介：Fivenewopticallyactivepolyamides(PAs)6a-6ewerepreparedbydirectpolycondensationreactionof2-(1,3-isoindolinedione-2-yl)-glutaricacid4asanewchiraldiacidwithvariousaromaticdiamines5a-5einamediumconsistingoftriphenylphosphite(TPP),calciumchloride,pyridine(Py)andN-methyl-2-pyrrolidone(NMP).Thepolycondensationreactionproducedaseriesofpolyamids6a-6einquantitativeyieldswithinherentviscositiesof0.26-0.39dL/g.Theresultingpolymerswerefullycharacterizedbymeansof~1H-NMR,FT-IRspectroscopy,elementalanalysis,inherentviscosityandspecificrotation.Thermalpropertiesofthesepolymerswereinvestigatedusingthermalgravimetricanalysis(TGA)anddifferentialthermalgravimetry(DTG).PhthalimideringsasabulkypendentgroupinthepolymerchainsdisturbtheinterchainandintrachaininteractionsandmakethesePAsreadilysolubleinpolar,aproticsolventssuchasN,N-dimethylacetamide(DMAc),N,N-dimethylformamide(DMF),dimethylsulfoxide(DMSO),N-methyl-2-pyrrolidone(NMP)andsulfuricacid.

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简介：Thepolymerizationof1-octeneinitiatedbymethylalumoxane(MAO)-activatedNi(Ⅱ)-based-α-diiminecomplexes[(2,6-i-Pr)_2C_6H_3-DAB(An)]NiBr_2wasinvestigated.Usingthiscatalyst,poly(1-octene)swithmolecularweightbetween100×10~3and400×10~3andpolydispersity(M_w/M_n)between1.3and1.5weresynthesizedsuccessfullybyvaryingreactiontimeatroomtemperature.Thepoly(1-octene)swereamorphouspolymersandcouldbewellsolubleintetrahydrofuran(THF).Afterfractionalprecipitation,poly(1-octene)swithnarrowmolecularweightdistributions(M_w/M_n≤1.12)wereobtained.Theirweight-averagemolecularweightsweremeasuredbygelpermeationchromatography(GPC)inconjunctionwithonlinemodelBI-MwAmultianglelaserlightscattering(MALLS),andtheirintrinsicviscositiesweremeasuredbyMaron'ssingle-pointmethod.ThekandavaluesinMark-Houwinkequation[η]=KM~αinTHFat40℃were0.089mL/gand0.61respectively.

简介：Theinsertionof1,1-bis(1′-naphthyl)ethylenemonomerunitintotheactivepolystyrenechainendgreatlydecreasedthereactivityoftheactivechainendtothecarbonylgroup,andallowedthepolymericchainendtoreactonlywiththedoublebondinN-methacryloylcaprolactam,resultinginN-acylcaprolactamfunctionalizedpolystyrenein100%conversion.Newdiblockcopolymerofpolystyrenewithpolycaprolactamwassynthesizedbydirectreactionofthefunctionalizedpolymerwithcaprolactamwithoutaddingadditionalalkalimetalortheircaprolactamsalts.

简介：Cobaltandnickelcomplexes(1a-1dand2a-2d,respectively)supportedby2-imidate-pyridineligandsweresynthesizedandusedfor1,3-butadienepolymerization.ThecomplexeswerecharacterizedbyIRandelementanalysis,andcomplex1awasfurthercharacterizedbysingle-crystalX-raydiffraction.Thesolidstatestructureofcomplex1adisplayedadistortedtetrahedralgeometry.Uponactivationwithethylaluminumsesquichloride(EASC),allthecomplexesshowedhighactivitiestoward1,3-butadienepolymerization.Thecobaltcomplexesproducedpolymerswithhighcis-1,4contentsandhighmolecularweights,whilethenickelcomplexesdisplayedlowcis-1,4selectivityandtheresultingpolymershadlowmolecularweights.Thecatalyticactivitiesofthecomplexeshighlydependedontheligandstructure.Withtheincrementofpolymerizationtemperature,thecis-1,4contentandthemolecularweightoftheresultingpolymerdecreased.

简介：1－Ethoxycarbonylalkyldiphenylpolystyrylphosphoniumtriflatescanbeeasilypreparedbyquaternizingdiphenylpolystyrylphosphinewithethyl2-trifloxyalkanoates;basetreatmentofthesepolymer-supportedphosphoniumtriflatesaffords1-ethoxycarbonylalkylidenephosphoraneswhicharestableandundergosatisfactoryWittigreactions.

简介：The1,1'-binaphtholbasedoligomers3and7with3,3'-acetylene-phenylene-acetylenespacerwerepreparedfromBINOL1.ThehighopticalrotationvalueandCDspectrademonstratedthemainchainchiralityoftheoligomermolecule.TheUV-VISandfluorescentspectraevidencethecharacteristicsofconjugatedstructure.Incomparisonwitholigomer2bearing3,3'-acetylenespacer,theoligomers3and7havelongerefficientconjugationsegment,andtheirfluorescentquantumyields(φ)increased(0.60-0.65versus0.14).Extendingtheeffectiveconjugationsegmentwouldimprovethephotophysicalpropertiesofchiralconjugatedpolymers.``

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：在这个工作，综合体新热地稳定(amide-imide)poly，有在n丁基甲基imidazolium溴化物的悬挂的2-pyridyl-1,3,4-oxadiazole单位的s作为反应媒介被报导了。新二羟基的酸从肼的反应被导出，2-(5-(3,5-diaminophenyl)-1,3,4-oxadiazole-2-yl)pyridine(POBD)，和trimellitic酸酐。聚合物在丁基甲基imidazolium溴化物从diimide二酸(DIDA)和不同的芳香的肼的反应被准备，[bmim][Br]，面对triphenyl亚磷酸盐(TPP)作为没有需要任何额外的部件的压缩代理人。poly准备了(amide-imide)s被FTIR描绘，元素的分析，并且通过模型混合物的合成。准备聚合物是可溶的在极并且aprotic溶剂例如DMF，DMSO，NMP和DMAc。聚合物答案的固有的粘性在在0.125g/dL的集中在集中的H2SO4测量在的0.521.33dL/g的范围(25

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简介：Ｍｅｔａｔｈｅｓｉｓｏｆ１－ＨｅｐｔｅｎｅｏｖｅｒＴｕｎｇｓｔｅｎＣａｔａｌｙｓｔＩｍｍｏｂｉｌｉｚｅｄｏｎＰｏｌｙｍｅｒｓＹａｏＪｉｎｓｈｕｌ；ＬｉＨｏｎｇ；ＳｕｎＪｕｎｔａｎ；ＨｅＢｉｎｇｌｉｎ（ＩｎｓｔｉｔｕｔｅｏｆＰｏｌｙｍｅｒＣｈｅｍｉｓｔ...

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简介：Anovelpolymercontainingthesucrosegroupwassynthesizedbyradicalpolymerizationfromanenzymaticallypreparedmonomer,1′-O-vinyladipoyl-sucrose(VAS).TransesterificationreactionofsucrosewithdivinyladipateinanhydrouspyridinecatalyzedbyanalkalineproteasefromBacillussubtilisat60℃for7daysgaveVAS(yield55%)withoutanyblocking/deblockingsteps.ThevinylsucroseestercouldbepolymerizedwithpotassiumpersulfateandH2O2asinitiatortogivepoly(1′-O-vinyladipoyl-sucrose)withMn＝33,000andMw＝53,200,Mw/Mn＝1.61.Thepolymerwasbiodegradable.After6daysinaqueousbuffer(pH7),thisalkalineproteasecoulddegradepoly(1′-O-vinyladipoyl-sucrose)toMnofca.1080,Mw/Mn＝3.30(37℃),andMnofca.5200,Mw/Mn＝2.44(4℃).Thepolymercontainingthesucrosebranchwouldbeafunctionalmaterialinvariousapplicationfields.