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1、北京服裴學(xué)院4,it宄m學(xué)化論史摘要本文采用兩步法合成了以PA6為硬段.PEG為軟段的熱塑性彈體,第一步孝N2保護(hù)下以H20為開環(huán)劑,6-氨基己陵為催化劑,己二酸為分子量調(diào)節(jié)劑,控制反應(yīng)溫度在250*(2,進(jìn)行己內(nèi)酰胺水解丌環(huán)聚合,制得雙端羧基PA6齊聚物.隨后進(jìn)行PA6齊聚物的萃取和干燥,利用端基滴定測(cè)定其相對(duì)分予質(zhì)量:笫二:步取柑制好的PA6齊聚物和適量的縣有一定川刈分了質(zhì)嫩的PEG于反應(yīng)器·h加入熱穩(wěn)定刺,1;i
2、{化劑和第:titS)-等,N2保J:J、II;SI泓至250℃,真空小于30Pa下進(jìn)行共聚合,待熔體粘度達(dá)到要求時(shí)于N2保護(hù)下出料。改變?cè)?/p>
3、配比和反應(yīng)條什(血¨PEG1一NX,J。分子質(zhì)量,PEG加入量),得到?系列聚酰胺型熱塑性彈性體。不tjjqjFTIR測(cè)定材料大分子結(jié)構(gòu),用DSC測(cè)定產(chǎn)物的熱性能,朋光學(xué)斛偏振和X射線衍剁‘研究了共聚物的等溫結(jié)晶動(dòng)力學(xué)邪結(jié)品性能。分析了共聚物分’r結(jié)構(gòu)對(duì)其性能的影響。對(duì)適。白:紡絲的共聚物彈性體,在單孔柱采式熔融紡絲儀上進(jìn)行模擬紡絲。制定不同的工藝參數(shù)劃仞生纖維進(jìn)行拉4'I_lffrl熱定型。測(cè)定了纖紼;的力學(xué)性能,煎點(diǎn)研究了纖維的彈性4:ilgqt,Pl!li『
4、復(fù)牢。利用X射線衍射測(cè)褂共聚纖糾咖q結(jié)lm性能,分析了纖維兒學(xué)‘P_I-能。j分予結(jié)構(gòu)和力¨]二
5、工藝條件的相互關(guān)系。品著提高了纖維舊彈性恢復(fù)率,使其具有實(shí)用價(jià)值,初步證實(shí)了聚酰胺型熱塑性彈性體用作彈性纖維的,叮行性。關(guān)鍵詞:聚酰胺型熱塑性彈性體己內(nèi)酰胺聚乙二醇嵌段共聚彈性纖維北京勝裂學(xué)院研究生學(xué)位論義ABSTRACTInthisthesis,thermoplasticelastomerwhosehardsegmentisPA6andsoftsegmentisPEGwassynthesizedbytow-stepprocess.Inthefirststep.£-caprolactamwashydrolyticringopeningpolymerizedwi
6、thH20astherl。ngopeningagent,02,一aminocaproicacidascatalyzerandadipicacidasthemolecularweiightregulatoratreactingtemperatureof2500C.PA6oligomerwithtwoendcarboxylwasprepared,thentheextractionanddrynesswerepracticedtotheoligomer,themolecularweightoftheproductwasmeasuredbyacid—basetitra
7、tion.Thesecondstep,mixedthePA6oligomerandagw‘enweighl。ofPEGwithacertainlmolecularweightinreacter,addingthermalstabilizer,catalyzerandathirdcomponent,etc,elevatedtemperatureat250。CwithN2forprotection,airproofedthereactorandvacuumizedslowlywhenthefirstdropofmicromoleculeliquidhassepar
8、atedout,madeabsolutepressurebelow30Pa,stoppedreactionwhentheviscosityofthemeltedpolymerwashighenough.AseriesofPolyamidethermoplasticelastomerscanbeobtainedbychangingcompoundingratioofrawmaterialaudreactionconditionflikemolecularweightofPEG'additionlevelofPEQetc.).FTIRwasusedtodeterm
9、inethemacromolecularstructureofmaterial,thethermalcharacteristicsofthispolymerwasanalyzedbyDSC,thedynamicsofisothermalcrystallizationandcrystallinityofcopolymerwasstudiedbyopticaldepolarizationandWAXD,respectively.Theeffectofcopolymer’Smolecularstructureonitspropertywasconstrued.For
10、thecopoly—elastomer