增塑劑對(duì)聚酯型可吸收縫合線的結(jié)構(gòu)與性能的影響研究

1、天津紡織工學(xué)院碩士學(xué)位論文增塑劑對(duì)聚酯型可吸收縫合線的結(jié)構(gòu)與性能的影響研究姓名：王繼東申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：材料學(xué)指導(dǎo)教師：付國瑞19981201STUD【ESONTHEEFFECTOFPLASTICIZERONTHESTRUCTUREANDPERFORMANCEOFABSORBABLEPOLYESTERSUTURESABSTRACTInthiSpaper，randomizedcopolymerofdioxanoneandglyc01

2、ide(PPDG)andpolydioxanone(PPDO)togetherwithplastiCizer(phthalate)werespunintomonofilamentsuturesTheSUtureswereStudiedbvexaminingthechangesoftensilestrength，flexibility，macromolecularorientation，the1evelofcrystallityofthe

3、suturesandthelossoftensilestrengthandweightofsamplesafterdegradationinvitroItwasfoundthatwhenthecontent0fP1asticizer(cp)wasbellowed9％，thetensilestrengthWOUldincreased：andwhenCpWaSbetween2～4％thesutureshadhighertens“estren

4、gthanddegreeofmacromolecularorientationBymeasuringtheflexibi1ityoftheSHturesWithdifferentCp，weknowthatwhenCpwasbetween4～8％and2～4％thePPDOsuturesandthePPDGSHLureshadhigherflexibilityandalSOwecanknowthattheflexibilityOftheS

5、UturesWiththesameCpWOUlddecreasewiththeincreasingofheattreatmenttemperatureTheresultofdegradatjoninvitroshowedthattheweightlossWOUidincreasewithCpandwhenCpwasbetween4～6％and6～9％thePPDOandthePPDGsutureshadsmailertensilestr

6、engthlosSTheresultofDSCdem()nstratedthatthetemperatureof91ass—transition。crystallinetemperatureandmeltingtemperaturedecreasedwithCp，huttheheatoffusion(△Hm)increasedWithCpFromthedataofWAXDweknewthatthedimensiOnofcrystalin