简介：

简介：Thisresearchstudiedtheinitiatorefficiencyforproducingpolymericparticlesofpoly(styrene-co-methylmethacrylate)copolymersbyaShirasuporousglassmembrane(SPG)emulsificationtechniquefollowedbysuspensioncopolymerization.BPO,ADVN,andAIBNwereusedasinitiatorsandwefoundthatBPOisthemostsuitableinitiator.Copolymersforvariousfeedratiosofstyrene/methylmethacrylatewerethussynthesizedbybenzoylperoxide,andtheircopolymerparticlesize,molecularweightdistributionandparticlesizedistributionwerecharacterized.Thenn-BMAor2-EHMAwasaddedasthethirdmonomertodecreasetheterpolymerglasstransitiontemperature.Thisarticledescribesthepreparationtechnique,recipesandpolymerizationconditionsforproducingbothcopolymerandterpolymerpanicles,particlesizechanges,thecorrespondingparticlemorphologiesandglasstransitiontemperatures.

简介：

简介：PolymerLBfilmscontainingphotofuntionalgroupswerepreparedbythecopolymerizationofN-dodecylacrylamide（DDA）,whichhasanexcellentpropertytoformastablemonolayerandLBmultilayerswithphotofunctionalmonomers.Tris（2,2’-bipyridine）rutheniumcomplex,Ru（bpy）32+,oneofthemostwell-knownredox-activesensitizer,wasincorporatedintotheDDAcopolymer.ThephotogalvaniceffectbasedonthephotoinducedelectrontransferusingtherutheniumcomplexinthepolymerLBmonolayerwasdiscussed.

简介：Inthispaper,sixkindsofactivatedcarbonssuchasAg^+-activatedcarbon,Cu^2+activatedcarbon,Fe^3+-activatedcarbon,activatedcarbon,Ba^2+-activatedcarbonandCa^2+activatedcarbonwereprepared.Themodelforestimatingactivatedenergyofdesorptionwasestablished.Temperature-programmeddesorption(TPD)experimentswereconductedtomeasuretheTPDcurvesofn-hexanolandthenestimatetheactivationenergyfordesorptionofn-hexanolontheactivatedcarbons.Resultsshowedthattheactivationenergyforthedesorptionofn-hexanolontheAg^+-activatedcarbon,theCu^2+-activatedcarbonandtheFe^3+-activatedcarbonwerehigherthanthoseofn-hexanolontheactivatedcarbon,theCa^2+-activatedcarbonandtheBa^2+-activatedcarbon.

简介：Theparameteridentificationmodelisproposedfordeterminingthelinearadsorptionisothermsandthesoliddiffusioncoefficientsbyusingadsorptionchromatorgaphy.Axialdispersioncoefficientsisfirstlydeterminedbypulse-respondexperimenttechniquewithaninertsubstanceastracer,thentheelutioncurvesofchromatographyseparatingtheisomermannitolandsorbitolaredeterminedbythechromatographicmeasuringtechnique,andpinallytheadsorptionisothermsandthesoliddiffusioncoefficientsofmannitolandsorbitolonCa^2+resinsareestimatedbyusingthismodel.Theresultsshowthattheaxialdispersioncoefficientsincreasewithfluidvelocityincreasing,Theadsorptionequilibriumconstantsdecreasewithtemperaturerising;andthesoliddiffusioncoefficientsincreasewithtemperaturerising.Thetheoreticalelutioncurvesaregoodagreementwiththeexperimentalelutioncurvesoftheliquidadsorptionchromatographyseparatingthemannitolandthesorbitol.Themodelprovidesasimpleandreliableproceduretoestimatethekineticandthermodynamicparmetersoftheadsorption.

简介：PositronannihilationtechniquewasusedtostudythemicellebehaviorsoftwoSBStriblockcopolymersinMEKsolventatdifferenttemperatures.Annihilationlifetimeτ3ofortho-positronium（o-Ps）exhibitedanobvioustransitionfromshorterlifetimetolongerlifetimewithtemperature.ItwasattributedtothechangeofmicellebehaviorofSBScopolymermoleculesinthesolution.Experimentalresultsofsedimentationvelocityofultracentrifugewerealsoreported.

简介：Inthiswork,somechemometricsmethodsareappliedforthemodelingandpredictionoftheHildebrandsolubilityparameterofsomepolymers.Ageneticalgorithm(GA)methodisdesignedfortheselectionofvariablestoconstructtwomodelsusingthemultiplelinearregression(MLR)andleastsquare-supportvectormachine(LS-SVM)methodsinordertopredicttheHildebrandsolubilityparameter.TheMLRmethodisusedtobuildalinearrelationshipbetweenthemoleculardescriptorsandtheHildebrandsolubilityparameterforthesecompounds.ThentheLS-SVMmethodisutilizedtoconstructthenon-linearquantitativestructure-activityrelationship(QSAR)models.TheresultsobtainedusingtheLS-SVMmethodarethencomparedwiththoseobtainedfortheMLRmethod;itwasrevealedthattheLS-SVMmodelwasmuchbetterthantheMLRone.Theroot-mean-squareerrorsofthetrainingsetandthetestsetfortheLS-SVMmodelwere0.2912and0.2427,andthecorrelationcoefficientswere0.9662and0.9518,respectively.ThispaperprovidesanewandeffectivemethodforpredictingtheHildebrandsolubilityparameterforsomepolymers,andalsorevealsthattheLS-SVMmethodcanbeusedasapowerfulchemometricstoolforthequantitativestructure-propertyrelationship(QSPR)studies.

简介：两次画技术被采用准备防腐蚀的涂层电影与acrylate由vinylidene氯化物(VDC)的共聚物的水的乳胶形成了的重型，也就是甲基acrylate(麻省)，乙醇acrylate(EA)，丁基acrylate(BA)或2-ethylhexylacrylate(EHA)。严厉咸水花的腐蚀测试证明优化两次画技术是酸的乳胶答案被适应pH56为首先油漆，当它为第二张画直接被利用时。严厉咸水花的腐蚀的600h的测试证明那MA-VDC85涂层能最优地保护钢，而有75%90%VDC内容的另外的acrylate-VDC涂层不能那么有效地保护钢。进一步的腐蚀测试证明(1)MA-VDC85涂层为咸水花的腐蚀的至少1000h保护了钢免受金属性的光泽的损失的伤害；(2)到钢的MA-VDC85涂层的粘附为咸水花的腐蚀的至少800h是优秀的，但是在1000h以后变得很差。微分扫描热量测定，thermogravimetric分析，X光检查光电子光谱学和Fourier变换红外线的光谱学被用来评估侵蚀的MA-VDC85电影。