聚合物共混體系和嵌段共聚物環(huán)帶球晶的形成.pdf

1、中國科學技術大學碩士學位論文聚合物共混體系和嵌段共聚物環(huán)帶球晶的形成姓名：張建斌申請學位級別：碩士專業(yè)：高分子化學與物理指導教師：馬德柱2001.4.1中留科學技術大掌碩士論文AbstraetAbstractInthisthesis，wemainlydiscussedthecrystallizationbehaviorandthecrystallizationmorphologyofpolymerblendsandblockedcopo

2、lymersInthefirstchapter，wemainlyreviewedthepolymerspherulitesatfirst，whichisquitefewinChineseJournalsandtextbookWediscussedthemechanismfortheMalteseCrossedofthesimplespherulitesandthemechanismforthepositivenegativespheru

3、litesWealsodiscussedthemechanismfortheformationofringedspherulitesinpolymerreferredtotheresearchresultsofKeith&PaddenandKeller’sInthisthesis，wemainlyconsideredthecrystaltwistingmechanism，whichadvancedthattheperiodtwistin

4、gofthespherulitecrystalisthereasonfortheappearanceoftheextinctionringsThenwediscussedtheresearchbackgroundofsomemisciblepolymerblendsandblockedcopolymersInthesecondchapterwemainlyinvestigatedthecrystallizationbehaviorand

5、crystallizationmorphologyofthreemisciblepolymerblends：PCL，PVC、PCL／PhenoxyandPCL／PCForthesethreepolymerblends，itwasfoundthatthecrystallizationrateofthecrystallizationcomponentPCLchangedasthenon—crystallizablecomponentinth

6、epolymerblendschangedWiththeincreaseofthetotalapparentintermolecularinteractionbetweenthetwocomponentsinthepolymerblends，thecrystallizationrateofthecrystallizablecomponentbecameslowerandtheregularityofthecrystallizableco

7、mponentincreasedItshowedthatduringthecrystallizationofthecrystallizablecomponentinthepolymerblend，whatmainlymatteredisthetotalapparentintermolecularinteractionbetweenditierentcomponentsWithsuitableinteractionstrength，the

8、crystallizablecomponentcouldhassuitablecrystallizationrateandthenon—crystallizablecomponentcouldhassuitablediffusionrateWhiletheyarematched，thecrystallizablecomponentcouldformregularringedspherulitesInthethirdchapter，wem

9、ainlyinvestigatedthecrystallizationbehaviorandthecrystallizationmorphologyoftheblockedcopolymerPCL—PBPCLWesynthesizedandcharacterizedtheblockedcopolymersatfirstThenwithFTIR，weinvestigatedtheHbondinginteractionbetweentheu

10、rethanesinthecopolymersItwasfoundthatwiththeincreaseofthePCLblocklength，theH—bondinginteractionstrengthdecreasedWhilewiththeincreaseofthePBblocklength，therewerealmostnochangesTheisothermalcrystallizationrateofthePCLblock

11、inthecopolymershadnothingwiththestrengthoftheHbondinginteractionbetweentheurethaneconnectingpointsHoweveritwascoincidedwiththetotalnumberofurethaneconnectingpointsinthecopolymersThemoietheconnectingpoints，theslowerthecry