简介：Linearpolysiloxaneswithpendantbenzo-15-crown-5moietieshavebeensynthesizedfrom3′-or4′-allylbenzo-15-C-5viahydrosilylationofmethyldichlorosilane,followedbypolycondensationwithsilanol-terminatedpolydimethylsiloxane.Itwasfoundthatthepolysiloxanescouldbeusedascarriersinbulkliquidmembranetotransportions.Factorsinfluencingtransportratehavebeeninvestigated.

简介：Ourobjectivesweretodevelopanewchemicalmethodforthepolymerizationofpyrrole.CuCl2dissolvedinC2H5OHsolventisprimarilyusedfortheinitiationpolymerizationofpyrrole.ThepolymerswithdifferentyieldandconductivitywereobtainedbyraringtheinitialconcentrationofCu2+.TheinitialconcentrationsofCu2+variedfrom1.2×10-4moleto6.48×10-3moleCu2+with2.16×10-2molepyrrole.Thepolypyrroleobtainedwascharacterizedwithelementalanalyzer,XPS,IRspectroscopy,Four-pointprobeandSEM.

简介：Theflowinjectionanalysiswasfirstlyusedforstudyingasolid-liquidadsorptionsystem,andthedynamicsprocessintheadsorptionofdyestuffwithregenerablechitinwastracedbyanonlinemethodofflowinjection-spectrophotometry.Experimentalresultsindicatethatthereisalinearizationbetweenthetestedsignalsandtheheightofpeakswithreciprocitycoefficient0.9999byusingtheflowinjection-spectrophotometrysystemtostudythedynamicsadsorptionprocessinsolid-liquidsystem.Themethodshowsagoodstabilityandreproducibility.Itprovidesanewmethodforthestudiesonadsorptiondynamicsinsolid-liquidsystem.

简介：一系列聚合物混合从1,3二度(3,4-dicyanophenoxy)被准备苯(3BOCN)和有是的甲基tetrahydrophthalic酐的环氧基树脂树脂治好代理人。治好的行为和混合的治好的动力学被微分扫描热量测定学习。没有3BOCN，有3BOCN的各种各样的内容的混合的明显的激活精力比混合的高。一个模型实验建议在phthalonitrile和环氧基树脂之间没有明显的反应。聚合物混合的热、机械的性质被评估。聚合物混合与整洁的环氧基树脂相比展出高存储模量和字符产量。聚合物混合证明由扫描电子显微镜学(SEM)的可锻的破裂形态学想象。

简介：

简介：Twohydrogen-bondingadsorbents-macroporouscrosslinkedpoly(P-nitrostyrene)andpoly(p-vinylbenzylamide)-weresynthesized,andtheadsorptionpropertyofphenolfromcyclohexanesolutionontotheadsorbentswasstudied,ThedifferentialadsorptionheastsforvariedadsorptioncapacitiescalculatedfromtheadsorptionisothermsaccordingtotheClaperyron-Clausiusequationlayintherangeofhydrogenbondenergy(8-50kJ/mol),Theadsorptioncapaccityofo-nitrophenolincyclohexanewasmochlessthanthatofphenolunderthesamecondition.Theadsorptioncapacityofphenolfromcyclohexaneontopolyacrylonitrilewasmuchlessthanthatontopoly(p-nitrostyrene)orpoly(p-vinylbenzylamide),Alltheseresultsrevealedthatadsorptionofphenolfromcyclohexanebypoly(p-nitrostyrene)orpoly(p-vinylbenzylamide)isbasedonhydrogen-bonding.

简介：为增加的目的在里面polycation基因搬运人的vivo稳定性，我们准备了一种pH敏感poly(乙烯乙二醇)-poly(-benzyl-L-glutamate-co-glutamic酸)(木钉针网阵列(65)，65表示glutamic酸的臼齿的比率在poly(-benzyl-L-glutamate-co-glutamic酸))。木钉针网阵列(65)显示出低cytotoxicity并且能高效地防护DNA/PEI(1:1)polyplexes的正电荷。transfection被提高由于部分收费在7.4的pH在HeLa房间线防护。有几乎没有transfection效率当第三的粒子的表面费用转到时在7.4的pH否定。然而，transfection效率在transfection的开始在6.0的pH由culturing恢复了很多。共焦的显微镜的观察和流动cytometry结果证明DNA/PEIpolyplexes应该高效地被释放并且在pH的endocytosized6.0，因为pH木钉针网阵列(65)的触发的deshielding行动。由于好biocompatibility和合适的pH触发了shielding/deshielding性质，木钉针网阵列(65)能是为在vivo使用的polycationic基因搬运人的一个潜在的防护系统。

简介：铝次磷酸盐(AHP)的效果作为火焰retardancy和包含铵polyphosphate(应用软件)和triazine的膨胀火焰retardant聚丙烯composites(PP/IFR)的热降级行为上的一个synergistic代理人，起泡沫嘉鱼之类的代理人(CFA)被限制氧索引(LOI)调查，UL-94测量，thermogravimetric分析(TGA)，锥热量计测试(锥)，扫描电子显微镜学(SEM)和X光检查光电子光谱学(XPS)。有AHP的IFR的联合展出了明显的synergistic效果并且为PP矩阵提高了火焰retardant效率，这被发现。有0.8公里的厚度的标本能递给UL-94评价的V-0，LOI价值基于24wt%，和AHP/IFR的最佳团部分的火焰retardant装载的总数到达33.5%是1:6。TGA数据表明AHP能改变IFR和PP/IFR系统的降级行为，在高温度提高IFR和PP/IFR系统的热稳定性并且支持字符残余形成。锥结果表明IFR/AHP混合能高效地减少PP的燃烧参数，例如热版本率(HRR)，全部的热版本(THR)，烟生产率(SPR)等等。字符残余的词法结构证明AHP在烧期间具有材料表面上的更紧缩、同类的字符层的形成的利益。XPS的分析显示AHP可以在材料表面上支持足够的字符的形成并且改进火焰retardant性质。

简介：Thepaperproposestheidentificationmethodoflinearandnon-linearchromatographicsystem.IsothermsandlumpedmasstransfercoefficientsofchromatographyseparatingisomersorbitolandmannitolonD80adsorbentaredetermined.Theanalysesofrootmeansquareerrorofchromatographyelutioncurvesarecarriedout.Theresultsshowthatthesystemstudiedisnon-linearandthetheoreticalelutioncurvesofthenon-linearchromatographicmodelaremoreaccuratethanthoseofthelinearchromatographicmodel,Resultsofparametersensitivityanalysesshowthatelutioncurvesofnon-linearchromatopraphicseparationaremoresensitivetothevariationofparameter“ai”intheadsorptionisothermsQi=Ci^*/(ai+biCi^*)thantothevariationofparameter"bi”aswellaslumpedmasstransfercoefficients.

简介：Entropiccontributiontotheinteractionparameterxeffinthemodelincompressiblepolymer/oligomersystemiscalculatedbythelatticeclustertheory(LCT).Itisfoundthatintheoligomersolvent,thereexistsawideconcentrationrangethatthenon-combinatorial"entropicinteraction"termxeffφ1φ2perceptiblycounteractsthemeanfieldcombinaryentropy△SMF.Withtheincreaseofthesolventsize,bothxeffandtheratioxeffφ1φ2/ASMFfirstreachtheirmaximumandfinallybecometriviallytozero.Itisworthnotingthatnoanydemixingwasfoundinthecurrentcalculation.Thismakesthecontroversialidea"entropicallydrivendemixing"evenelusive.However,weproposethatfurtherworkoncompressible

简介：Fromaneconomicalpointofviewboththequalityoftheionexchangeresinsandthetechnologyusedinthefieldofindustrialwatertreatmentareimportantforasuccessfulperformance.Ingeneral,twodifferenttechnologieshavebeenestablishedonthemarket:ThemaindiffernecesbetweentheCO-andcountercurrenttechnologeswillbediscussedanddataconcerningtherequirementofchemicalsforregenerationandthequalityofthedeionizedwaterwillbeopposed.Inadditionseveraldifferentvarietiesofthemoderncountercurrenttechnologies,developedandpatentedbyBayerAG,willbedescribedandtheadvantages,dependingontheapplicationandthedemandonthequalityofthedeionizedwater,pointedout.Inviewofstrongerregulationsconcerningtheconsumptionofregenerationchemicals,andwastewater,andalsobecauseofthesuperiorqualityoftheproducedwater,themarketshareofcountercurrenttechnologieswillcontinuetoincreaseworld-wide.

简介：

简介：Theaqueouspolymerizationofmethylmethacrylateintiatedbycopperpolypropylene-basedpoly(oxime-imidodiacetate)(P-Cu)-sodiumsulfitesystemhasbeeninvestigated.Theoverallrateofpolymerization(Rp)wasfoundtobeRp=5.8×10^12e^-84.1KJ/RT[MMA]^1.4[P-Cu]^0[Na2SO3]^0.50Amechanismof“coordination-protontransfer”fortheproductionofinitiatingspecieswasproposedanddiscussed.

简介：

简介：Inthispaper,itwasinvestigatedthattheeffectofparameterssuchastheionicstrength,pH,counter-iontypeofreleasemedium,particlesize,andcrosslinkageofcationexchangeresinonthereleaseofmodeldrugpseudoephedrinehydrochloride(PE)fromuncoateddrug-resincomplex.Thedrug-resincomplexwaspreparedbythereactionofPEwithstronglyacidiccationexchangeresin(001×4,001×7,001×14).TheresultshowedthattheloadingofPEincreasedwiththeincreaseoftemperatures.ThereleaseofPEfromdrug-resincomplexat37℃wasmonitoredinvitro.Fromtheexperiments,itwasfoundthatthereleaserateofPEdependsonthepH,compositionofthereleasingmedia,increasedatlowerpHmediaorwithincreaseofionicstrengthofmedia.Moreover,thereleaserateofPEwasinverselyproportionaltothecross-linkageandparticlesizeofthecationexchangeresin.

简介：LigandeffectofthecatalyticsystemWCl6-Et2AlClforringopeningmetathesispolymerization(ROMP)ofdicyclopentadiene(DCPD)wasinvestigated.Theexperimentalresultsshowthataddingstericallyhinderedphenol-2.6-di-tert-butylcresylol(DTBC)inthecatalyticsystemnotonlycanobviouslyincreasethemonomerconversionofpolymerizationbutalsoimprovethemechanicalproperties,suchasnotchedimpactstrength(NIS),tensilestrength(TS)ect.,ofthesynthesizedpolydicyclopentadiene(PDCPD),Asimilareffectcanbeobservedbyusingastericallyhinderdpolymericphenol-linearphenolformaldehyderesin(LPF)asaligand.

简介：Kineticsofchloride/sulfate,chloride/nitrateandnitrate/sulfateforwardexchangesandreverseexchangesatsolutionconcentrationsof1N,0.2Nand0.02Non201×7strongbaseanionexchangeresin,respectively,havebeenexaminedat25℃.Itisfoundthattheforwardandthereverseexchangeratesofthetwogivenionsatlowsolutionconcentration,respectively,underidenticalconditionscanbecontrolledbydifferentmechanisms,whilethoseathighsolutionconcentrationareallcontrolledbyparticlediffusion.Theternaryexchangeratesofsulfate/(chloride+nitrate)andnitrate/(chloride+sulfate)havealsobeenexamined.

简介：Threepolymericadsorbentswithhydrogenbondingacceptors,methylamine,N-methyl-acetamideandaminotri(hydroxymethyl)methanemodifiedresinsaresynthesizedfromchloromethylatedX-5resin.AdsorptionisothermsofphenolandtheophyllineontothethreemodifiedresinsandtheoriginalX-5resinfromaqueoussolutionaremeasured.TheresultsshowthatadsorptionofcompoundswithhydrogenbondingdonorontomethylamineandN-methylacetamidemodifiedresinsisenhancedascomparedwiththatontoX-5resin,andadsorptionmechanismbetweentheadsorbentsandtheadsorbatesismainlybasedonhydrogenbondingandhydrophobicinteraction.Whileadsorptionofcompoundswithhydrogenbondingdonorontoaminotri(hydroxymethyl)methanemodifiedresinisloweredascomparedwiththatontoX-5resin,andadsorptionmechanismbetweentheadsorbentandtheadsorbatesismainlybasedonhydrophobicinteraction.

简介：poly包括的合成聚合物电解质(用户终端设备)(vinilydenefluoride-hexafluoro丙烯)，PVDF-co-HFP和锌triflate，Zn(CF3有改变ZrO2nanofillers的集中的3)2被与N扔技术的答案因此准备，N-dimethylformamide(DMF)作为普通溶剂。有特别作文的聚合物电解质标本75wt%PVDF-co-HFP：7wt%ZrO2显示出的25wt%ZnTf+4.6的最高的传导性??????????????€潰祬???????畃????猯灵？？

简介：Inthispaperstudyonthepropertyandmechanismofadsorptingrheniumfromaqueoushydrochloricacidbyusingmethylphosphorousaciddimythylheptylesterlevextrelresin(CL-P350)isreported.Theeffectsoftime,acidity,concentrationofrhenium,andtemperatureontheadsorptionofrheniumwereinvestigated.ThemechanismofadsorptingrheniumwasdiscussedbychemicalanalyticandIRmethod,anddynamicadscrptionandelutionwerestudied.Experimentalresultsshowthattheadsorptionequilibrationisreachedin4min,thedistributioncoefficient(D)ofRe(Ⅶ）increaseswithincreaseofconcentrationofHClandreachesmaximum3.0-4.0moL/LHCl.ReO4^-istakenupbyionassociationmechanismandcanbedescribedbyLangmuirequationoftheequilibriumstate.ThethermodynamicparametersintheadsorptionprocessofReO4^-havebeendeterminedtobe:ΔH=-29KJ/moL,ΔG=-25KJ/moLandΔS=-13.5J/moLrespectively.Thesaturationadsorptioncapacityofrheniumis19.2mg/gwhenthesolutioncontaining0.372g/LReand3.0mol/LHClwaspassedthroughtheresincolumn.Therecoverypercentageofrheniumis98.4%whiledistilledwaterwasusedasaneluent.