蓖麻油在聚乳酸改性中的應(yīng)用.pdf

1、浙江大學(xué)碩士學(xué)位論文蓖麻油在聚乳酸改性中的應(yīng)用姓名：邊新超申請學(xué)位級別：碩士專業(yè)：化學(xué)工程指導(dǎo)教師：申屠寶卿201108浙江人學(xué)碩士學(xué)位論文Abstract摘要Poly(Llacticacid)(PLLA)isallenvironmentalfriendlymaterialduetoitsbiodegradability，biocompatibilityandnontoxicity，anditisproduciblefromtheren

2、ewablesourcesAlthoughPLLAanditscopolymershavebeenintensivelystudied，itisdifficulttobroadenitspracticalapplicationrangeofPLA，duetoitsinherentbrittlenessandhi【ghpriceInthisthesis，theinfluenceofcastoroilasaninitiatorontheri

3、ng—openingpolymerizationoflactideandtheeffectofthecastoroil弱aplasticizeronthePLAblendwerestudiedThechemicalstructureandthermalpropertiesofthepolymerswerecharacterizedbyDSC，TGA，F(xiàn)TIRandNMRCastoroilWasusedtocontrolthemolecu

4、larweightofPLAandtoincreasethepolymerizationspeedThehighmolecularweightPLAWasobtainedwhentheamountofcastoroilamountWaslowerthanl％TheresultsofFTIRandNMRshowedthatthechemicalbondswereformedbetweencastoroilandlacticacidmole

5、culesCastoroil弱aplasticizercouldincreasetheplasticityofPLA，butthemechanicalstrengthofPLAdecreaseatthesametimeWhenthecontentofcastoroilintheblendsWas20wt％，theelongationatbreakreachedover240％Thecastoroillacticacidcopolymer

6、shadthehightougheningeffectonPLA，andtheeffectWasmoreobvious、析tlltheincreaseofitscontentTheincorporationofisophoronediisocyanate(IPDI)couldfurtherincreasethemechanicalpropertiesofPLAWhentheIPDIcontentWas05％，thetensilestre

7、ngthandelasticmodulusreached625MPaand2108MParespectivelyTheelongationatbreakandnotchedimpactstrengththanthesampleswithoutaddingIPDlwerel13％and95kJ／mz，respectivelyWiththecombinationofthenucleationagent(talc)andIPDI，thehea

8、tresistanceofPLAWaseffectivelyimproveedBasedonthis，ThestrengthenPLAcompositefurtherincreasedaftertheadditionofglassfiber，andthenotchedimpactstrengthWas2to3timeshigherthanthatthepurePLAKeywords：PLA，castoroil，plasticizatio