小分子酯類增塑劑對聚乳酸的增塑改性研究.pdf

1、上海大學碩士學位論文小分子酯類增塑劑對聚乳酸的增塑改性研究姓名：曹燕琳申請學位級別：碩士專業(yè)：高分子化學與物理指導(dǎo)教師：尹靜波20070201上海大學碩士學位論文Poly(1acticacid)(PLA)hasattractedmuchattentionbecauseitisbiodegradable，compostable，produciblefromrenewableresouices，andnontoxictothehumanbo

2、dyandenvironmentInthispapercitrateesters(ATBC、TBC、TEC)andphthalate(DOP、DBP)、Ⅳefeused勰plasticize稿toplasticizePLAThethermalpropertiesmechanicalpropertiesandmigrationofplasticizerwe犯evaluatedThemechanismofplasticizationwasa

3、lsodiscussedDSCresultsshowthataddingplastieizerstoPLAviameltblendingmaybealleffectivewaytodecreasetheglasstransitiontemperatureofPLAThemechanicalpIq崩tiesincludingflexibilityandtoughnessofPLAareimproveduponplasticizersloa

4、dingAlltestsprovethatcitrateestersandlowmolecularphthalateareallthegoodplasticizersforPL九Thelowermolecularweightofesterthebetterpe觸撇ofplasticizercanbeachievedButitiseasierforlowermolecularweightedestertomigrateAlsothewat

5、erresistanceofresultantmaterialsbecomespoorwhenthemolecularweightofcitrateesterislowWithoutadditivesPIJAisstiffandbrittleBlendingwithlowmolecularesterscanimprovethematerial’smechanicalproperaes，howeverthecrystallizingbeh

6、aviorofPIJAaffe斌itsmechanicalplDpeniesandremictitsusingpropertiesSowehavestudiedtheisothermalcrystallizingbehaviorofPILAandPLLA／PlasticizerbycrystallizationrecorderandopticalpolarizationanalyzerTheresultindicatesthatthea