1、天津工業(yè)大學(xué)碩士學(xué)位論文聚乙二醇脂肪酸雙酯的合成及其性能研究姓名：王彤申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：應(yīng)用化學(xué)指導(dǎo)教師：鄭幗20090101AbstractSynthesisofPEG600oleicaciddiesterandPEG400lauricaciddiesterweresynthesizedbydirectesterificationusingpolyethyleneglycolandfattyacidrespectivelyThe

2、effectsofcatalyst，reactiontime，reactiontemperatureandmolarratioonreactionwerediscussedTheoptimumsyntheticconditionofPEG600oleicaciddiester勰follows：ThesynthesisisbasedonprotectionofN2，Usingmassfraction1％inpowersolidsupera

3、cidascatalyst，molarratioofpolyethyleneglycolandoleicacid1：25，reactiontemperatureabout210“C，andreactiontime8hTheoptimumsyntheticconditionofPEG400lauricaciddiesterasfollows：massfraction4‰ptoluenesulphonicacidascatalyst，mol

4、arratioofpolyethyleneglycolandoleicacid1：18，reactiontemperatureabout130。C140。C，andreactiontime910hTheresultsoftestingofdiesterproductsshowedthattheyieldofPEG600oleicaciddiesteris829％，theyieldofPEG400lauricaciddiesteris92

5、97％WeusingpowdersolidsuperacidascatalystinthisexperimentofsynthesisofpolyethyleneglycololeicaciddiesterObtainedthroughexperimentsthatthecatalyticeffectsofsolidsuperacidisbetterthanthosetraditionalcatalystsofesterificatio

6、nsuch舔sulfuricacid，ptoluenesulphonicacid；theactivitytemperatureofpowdersolidsuperacidmustbehigherthan170“C；Thesolidsuperacidcatalystcanberecycled5timeswithoutobviouslossofcatalyticactivityandstillcanensurerelativelyhighy

7、ieldTheproductofpolyethyleneglycolfattyaciddiesterwascharacterizedbyafouriertransforminfraredspectrometer(FTIR)，andtheemulsifyingability，foamingability，sufacetension，wettability，heatresistanceandglidingpropertyweretested

8、Comparedthepropertieswithsimilarmonoesterandtheexperimentalresultsindicatethattheemulsifyingabilityofmonoesterisbetterthandiesterbecausethehierarchicaltimeofdiesterislongerthanmonoester，andemulsifyingabilityoflongchainis

9、betterthanshortchain，thehydrophobicityenhancedandthehydrophilicitydecreasedwithincreaseofthemolarratioofoleicacidandpolyethyleneglycol；thefoamingabilityofdiesterisweakformsofmonoester，belongstolowfluttermagnetfoamingnoni