简介：ToimprovethewatertreeresistanceofPE,linearlow-densitypolyethylene(LLDPE)wascompoundedwithsodiumacrylate(NaAA)forinsitupolymerization,inwhichNaAAwasformedthroughtheneutralizationofacrylicacid(AA)withsodiumhydroxide(NaOH)beforeaddingdicumylperoxide(DCP)toinitiatetheinsitugraftpolymerizationandhomopolymerization.AseriesofLLDPE/NaAAcompoundswereinvestigatedfortheirwaterabsorptionratio(WAR)measurement,watertreeing,mechanicalanddielectricproperties.TheresultsstronglysuggestthatNaAAcanimprovethewatertreeresistanceofLLDPE.Inaddition,theLLDPE/NaAAcompoundspossesssatisfactorymechanicalpropertiesanddielectricproperties.CharacterizationofLLDPE/NaAAcompoundsbyusingFouriertransforminfraredspectrometry(FTIR)suggeststhattheneutralizationandpolymerizationreactioncouldbeachievedeffectively.UsingadequateDCPcontentisthekeyfactorforcontrollingthepolymerizationofNaAAwithpreciseconversionratio.

简介：Thispaperreportsthekineticsofgrouptransferpolymerization(GTP)ofethylacrylate(EA)withzinciodidecatalystin1,2-dichloroethaneusingdimethylketenemethyltrimethylsilylacetal(MTS)asinitiatorat0℃andabove0℃.Theamountofcatalystusedwasstudied.Whenzinciodidecatalystusedismorethan10mol%relativetomonomer,therateofpolymerizationisproportionaltotheconcentrationofmonomer,whereaszinciodidecatalystusedislessthan10mol%ofthemonomer,therateofpolymerizationisindependentofthemonomerconcentration.IntheGTPofEAaninductionperiodwasobservedwhenthezinciodidecontentsarelessthanl0mol%.Ifthereactiontemperatureisover0℃,livingspeciesbecomeunstableanddiminish,leadingtoincompletemonomerconversion.Thereactioncurvesequationsareobtained.Thepolymershavenarrowmolecularweightdistributionswhicharenotchangedasdecreasingzinciodidecontents.Thepolydispersityisabout1.2.

简介：Macroporousmethylacrylate-divinylbenzenecopolymersweresynthesizedandmodifiedbypolyethylenepolyamine.TheaminoacylasefromAspergillusoryzaewasadsordedonthesemodifiedcopolymers.Theroleofcertainfactorssuchasdegreeofcross-linking,amountofporegenicsolvent,modifyingagentandporestructures,intheactivityofimmobilizedaminoacylasewasstudied.EffectsofadsorptiontimeandamountofenzymeusedontheactivityofaminocylaseimmobilizedonMMD-12-13werealsoinvestigated.ThecolumnofaminoacylaseimmobilizedonMMD-12-13waspreparedandN-acyl-DL-methioninewasresolvedcontinuouslyforamonth,theremainingactivitywasstillover90%.

简介：Thefactorsaffectingparticlesizeofreactivemicrogelsformedduringtheself-emulsifyingcopolymerizationofunsaturatedpolyester(UP)withbutylacrylate(BA)havebeenstudied.Theparametersdiscussedare:theproportionoftheUPinthemonomermixture,themolecularweightandthecarboxylvalueoftheUP,thephaseratio,theelectrolyteconcentrationandthepolarsolventadditive.Theseedingemulsionpolymerizationisdiscussedaswell.Itturnedoutthattheparticlesizeofthereactivemicrogelscanbecontrolledinadefiniterangebychangingtheexperimentalconditions.Howevertheparticlesizedistributionbecomesbroaderastheaveragediameterincreases.Itissuggestedthattheagglomerationofprimaryparticlesplaysanimportantroleduringthegrowthofmicrogelparticle.

简介：Asiliconeacrylatemicro-emulsionofmultipolymerwaspreparedbyseedemulsionpolymerization.Theeffectsofpolymerizationprocess,emulsifierrateandamount,initiatorrateandamount,polymerizationtemperature,functionalmonomers,titrationtimeonperformancesofemulsionhavebeendiscussedindetail.

简介：

简介：Aseriesofpoly(methylacrylate)copolymersofdifferentporestructuresweresynthesizedandfunctionalizedbypolyethylenepolyamine.Thelipasefromporcinepancreaswasadsorbedonthesepolymercarriers.Itwasfoundthattheproestructureandfunctionalgroupwerebasicfactorswhichaffectedtheactivityofimmobilizedlipase,TheoptimalconditionsforadsorbinglipasewerestudiedandtheeffectsofpH,ionicstrengthandtemperatureontheimmobilizedlipasewerecomparedwiththoseonthedissolvedlipase.

简介：

简介：Seriesofpoly(methylacrylate)copolymersofdifferentporestruc-turesweresynthesizedanddirectlyaminatedbypolyethylenepolyamine.Thelipacefromporcinepancreaswasadsorbedonthesecopolymers.Theactivityofimmobilizedlipasewasinfiuencedbydifferentpolyethylenepolyamines,thedegreeofcross-linkingandtherelativerolumeofpore-generatingsolvent.

简介：Polyfluoroalkylsubstituted2-hydroxyethylacrylate6wassynthesizedinsixstepsusingglycerolasastartingmaterial.Apreliminaryinvestigationhasbeentakenonthesynthesisandcharacterizationofcopolymersof6and2-hydroxyethylmethacrylate.

简介：Aneficientliquid-phasesynthesisofisoxazolinesthrougha1,3-dipolarcycloadditionisdescribed.Solublepolymer-supportedacrylatereactedwithnitrileoxidesgeneratedin-situ,followedbycleavagefromthesupportgivingcorrespondingisoxazolinesinhighyieldsandexcellentpurities.

简介：与钾每硫酸盐(KPS)作为开始者，ethylacrylate(EA)的接枝共聚化合物在水介质被调查到水溶性的hydroxypropyl纤维素甲醚(HPMC)上。grafting(G)和grafting效率(G_E)的百分比上的单体集中，开始者集中，矩阵集中，和反应温度的效果被学习。结果显示出价值两个都增加与的那G和G_EEA集中andKPS集中的增加；当从0提起HPMC集中时。12mmol/L到0.47mmol/L，G减少，当G_E增加时；并且当从50℃提起反应温度到65℃时，G增加，但是G_Edecreases。另外，接枝共聚物被Fourier变换描绘红外线(英尺红外)系列和传播电子显微镜学(TEM)方法。

简介：Thecatalytichydrogenationofpalladiumchelatingresinscontainingchiralaminoacidligandsbasedonlowercrosslinkedpoly(chloroethylacrylate)andsomeeffectsontherateofhydrogenationwerestudied.

简介：Anovelacrylateinimer,2-(2-chloroacetyloxy)ethylacrylate,waspreparedbythereactionof2-hydroxyethylacrylatewithchloroacetylchlorideinthepresenceoftriethylamine.Theself-condensingvinyllivingradicalpolymerizationoftheinimerwasstudiedandthehyperbranchedmacromoleculescontainingesterlinkagesontheirbackbonewereprepared.Allthepolymerizationproductswerecharacterizedby1HNMR.Thepolymerizationdegreeandthebranchingparameterwerecalculatedbasedonthe1HNMRspectra.Ithasbeenshownthatthisinimerexhibitsaverydistinctivepolymerizationbehavior.Similartostep-growthpolymerization,thepolymerizationdegreeoftheproductsformedincreasedexponentiallyduringtheearlystageofthepolymerization,andthentheincreasingratesloweddown.However,theinimerremainedpresentthroughoutthepolymerizationconsistentwithconventionalfreeradicalpolymerization.Also,ifmuchlongerpolymerizationtimewasused,thepolymerizationsystemwouldbecomegelduetothecrosslinkingreactionderivedfromradical-radicalrecombination.Asaresultoftheunequalreactivityof-CH2Cland>CHCl,analmostlinearproductwasobtainedatamolarratioofbipytoinimer=0.05,whilearelativelyhighratioofbipytoinimer1favoredtheformationofthebranchedstructure.Themacromoleculesformedatahighratioofbipytoinimer1exhibitedanexcellentsolubilityinorganicsolventssuchasacetone.

简介：Acrylateterpolymer-boundSe,Nbidentateligandwassynthesizedfromthesidechainchlorineofcopolymerandβ-dimethylamino-β′-hydroxyl-diethylselenoether.Thepolymer-supportedplatinumcomplexexhibitedhighcatalyticactivityinthehydrosilylationofolefinswithtriethoxysilane.

简介：2－Hydroxyethylacrylateissynthesizedfromacrylicacidandethyleneglycolunderasimpleandmildconditionbyusingstrongacidiccationionexchangeresinasacatalyst,whichcouldberecycledaslongas10timeswithhighactivation.

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：Thesemibatchemulsifier-freeemulsioncopolymerizationofmethylmethacrylate(MMA)andbutylacrylate(BA)inthepresenceof2-hydroxyethylmethacrylate(HEMA)initiatedbyK2S2O8(PSP)wasstudied.Thelatexparticlescanmaintainanappreciablestabilityduringtheemulsifier-freeemulsioncopolymerizationofMMAandBAinthepresenceofHEMA.Theaverageparticlediameterincreasewithanincreaseoftotalsolidscontent,HEMAcontent,PSPcontent,ionicstrengthofthesystemandmonomerfeedrate,anddecreasewiththemonomerfeedrationfrom3/1(MMA/BA:molarration).to1/3.ThestabilityofthisreactionsystemisimprovedbyaddingHEMAasnonioniccomonomer,Highsolidscontent(50%)latexwithmonodisperseparticlecanbeobtainedusingthisprocess.

简介：Muchattentionhasbeenpaidtothedevelopmentofnewpolymerelectrolytewithspecialmorphology,soastoimprovetheirelectrochemicalpropertiestomeettheneedsoflithium(ion)battery.Inthiswork,PEMlatexwassynthesizedbyemulsion-fi-eepolymerization.ThemicrophotoofPEMlate...

简介：Cationic乳胶与cationic表面活化剂通过苯乙烯(圣)和丁基acrylate(BA)的乳剂copolymerization被准备，cetyltrimethyl铵溴化物(CTAB)。包括粒子尺寸，乳胶性质缩放分发，潜力，表面紧张和单体变换，为与不同CTAB数量准备的乳胶被决定。这些性质的进化在乳剂聚合期间被跟随以便理解粒子形成的机制。结果证明粒子尺寸和潜力是聚合时间和乳胶固体的功能。有cationic的平行乳剂聚合，anionic控告了开始者，没有费用的开始者也被执行，乳胶性质在不同聚合时间被决定。所有这些结果专心地基于乳剂聚合，表面活化剂吸附和乳胶粒子稳定的机制被解释。