高分子化學(xué)雙語期中課程試卷

學(xué)院（部）專業(yè)化學(xué)工程與日期201211年級10/11 學(xué) 姓名 成績 學(xué)院（部）專業(yè)化學(xué)工程與日期201211年級10/11 學(xué) 姓名 成績 2.Summarizethecausesandramificationofthegeleffectinfree3.Drawtheisotactic,syndiotacticandatacticstructuresof4.DrawthestructureoftheproductsofthefollowingtherepeatunitandstatethetypeofpolymerformedineachCommentonanydifferencesinphysicalpropertiesyoumightforthepolymersproducedinparts(c)and5.Thepoly(N,N-dimethylacrylamide)fromradicalpolymerizationbeenfractionatedtogive3monodispersefractions.CalculateMnand 5.Thepoly(N,N-dimethylacrylamide)fromradicalpolymerizationbeenfractionatedtogive3monodispersefractions.CalculateMnand 1236.Calculateofacidgelationwilloccurinmixtureof55mol%adipicacid(己二酸30mol%ethyleneglycol(乙醇),and15mol%glycerol(丙三醇).Predicttheactualgelationpointsuchreactionandgivethe7.SupposethatinthepolyesterificationreactionbetweenandHOOC(CH2)4COOHthediacid(adioicacid)hasanimpurityofmol%ofwhichyouareunaware.Whatarethemaximumvaluesofnumberaverageandweightaveragemolecularweightsthatyouobtaininthereaction?(108.Methylmethacylate(MMA)waspolymerizedatamassof200g·dm-3intolueneusingazobisisobutyronitrile(AIBN)asatamassconcentrationof1.64×10-2g·dm-3andareactiontemperature60oC.Calculatetheinitialrateofpolymerizationandthemolarmassthepoly(methylmethacylate)formedintheinitialstagesofthegiventhattherelevantratecoefficientsatgiventhattherelevantratecoefficientsat60oCInitialdissociation,kd=8.5×10-6s-Propagation,kp=833dm-3·mol-1·s-Transfertomonomer,ktr,M=3.93×10-3dm-3·mol-1·s-MolarmassofMMAis114.14g·mol-MolarmassofAIBNis164.21g·mol-Assumethattheinitiatoreffici