全降解型淀粉基复合材料的制备与高性能化

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1、上海交通大学硕士论文摘要全降解型淀粉基复合材料的制备与高性能化摘要作为降解塑料中应用最广泛的一种淀粉基复合材料的大力发展是应对石油危机和白色污染最好的办法之一然而由于淀粉属于含多羟基的刚性天然高分子材料差的机械性能和高的吸湿性等缺陷一直阻碍着该类材料的大量应用提高材料的强度改善淀粉塑料的耐吸湿性以及热稳定性是淀粉塑料的重点发展方向本文运用热塑性淀粉的制备技术复配增塑技术熔融共混改性技术相容剂增容改性技术制备得到高性能化的全降解型淀粉基复合材料并较为系统地研究了上述改性技术对热塑性淀粉材料的微观结构加工性能机械性能动态

2、热机械性能流变性能和吸水性的影响实验结果表明复配增塑剂有助于改善淀粉分子间的相互作用力使TPS材料的力学性能及热稳定性得到改善热塑性淀粉和EVOH进行复合使各组分间形成了很强的相互作用可有效改善淀粉塑料的机械性能和耐吸湿性相容剂EEA的添加可增加TPS与EVOH之间的相容性和界面间的相互作用从而改善了TPS/EVOH材料的加工性能提升了材料的机械性能和疏水性能关键字淀粉EVOHEEA增塑剂相容剂I上海交通大学硕士论文摘要PreparationandHigh-performanceofFullyDegradableSt

3、arch-basedCompositesAbstractAsakindofthemostwidelyuseddegradablematerial,anydevelopmentofthestarch-basedplasticsisextensilvelybenefitforsolvingthe“oilcrises”and“whitepollution”problems.However,starchbelongstorigidnaturalpolymerwithmanyhydroxyls,andsomeshortcomi

4、ngslikepoormechanicalpropertiesandhighmoistureabsorptionalwayslimititsapplication.Therefore,improvingthetoughness,hydrophobicproperties,andthermalstabilityofstarchplasticswillbethesignificantdevelopingdirectionofthestarchplastics.Inthispaper,high-performancedfu

5、llydegradablestarch-baseplasticswerepreparedthroughtheapplicationofsuchperformance-improvedtechnologiesaspreparationofthermoplasticstarch(TPS),plasticizermixtures,meltblendingandcompatibilizer.Andtheeffectofaboveimprovedtechnologiesonthemicrostructure,processib

6、ility,mechanicalproperties,dynamicmechanicalproperties,rhelogicalpropertiesandmoistureabsorptionoftheTPSmaterialswerealsoinvestigated.Theexperimentalresultsshowthattheplasticizermixturesarehelpfulformodifyingthestarchmoleculesinteractionandimprovingthemechanica

7、lpropertiesandthermalstabilityofTPSmaterials.ThecompoundingofTPSwithII上海交通大学硕士论文摘要ethylene-vinylalcoholcompolymer(EVOH),canimprovethemechanicalpropertiesanddecreasethehighwaterabsorptionoftheTPSmaterialthroughtheformationofstronginteractionamongthecomponents.Th

8、eintroductionofethylene-ethylacrylatecopolymer(EEA)isbeneficialtoincreasethecompatibilityandinterfacialinteractionofTPSandEVOHandimprovethemechanicalpropertiesandhydrophobic