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Shape-Memory Polymer Device Design. A volume in Plastics Design Library


PREFACEINTRODUCTIONHISTORY OF SHAPE-MEMORY POLYMERSCROSS-LINKING, THERMAL TRANSITIONS, AND SHAPE-MEMORY POLYMER CLASSIFICATIONCross-linkingThermal transitionsClassification of shape-memory polymersMECHANISM OF THE SHAPE-MEMORY EFFECTRECOVERY METHODSSHAPE-MEMORY POLYMER TERMINOLOGYLIMITATIONS OF SHAPE-MEMORY POLYMERSRecovery time and activation methodsRecovery force and work capacityOVERVIEW OF THIS WORKREFERENCESTWO DesignOVERVIEWDESIGN METHODOLOGYStage 1: Planning and understanding design needsDesign needStage 2: Conceptual designEstablish the functional boundariesActuationMethod of activationSpeed and strength of recoveryStrain capacityShape memory effect and multifunctionalityEstablish the mechanical requirementsEnvironmental considerationsConsider proposed solutionsStage 3: Embodiment designStage 4: Detail designMethods of manufactureCasting and synthesisMoldingFoams and porous structuresElectrospinning and melt-blowingD printingMethods of programmingTension and compressionExtrusionPackaging and storageSecondary programmingLong-term storage effects (shape-fixity, creep, etc.)COMMERCIALLY AVAILABLE SHAPE-MEMORY POLYMER PRODUCTSREFERENCESTHREE Material SelectionMATERIAL SELECTION OF SHAPE-MEMORY POLYMERSCase study 1: Heat-shrinkable nonimplanted mesh introducerCase study 2: Soft-tissue anchorPROPERTIES AND PERFORMANCEPROPERTIES OF SHAPE-MEMORY POLYMERS(Meth)acrylatesPolyurethanesEpoxyThiolPolyethyleneCOMPOSITESFOAMSFIBERS AND NONWOVENSCOMMERCIALLY AVAILABLE SHAPE-MEMORY POLYMERSABBREVIATIONSREFERENCESFOUR Programming of Shape-Memory Polymers: The Temperature Memory Effect and Triple/ Multiple-Shape-Memory Effect in PolymersINTRODUCTIONCHARACTERIZATION AND MODELING TME, TSME, AND MSME IN VARIOUS POLYMER SYSTEMS Amorphous polymersSemicrystalline polymersPolymers with dual phase transitionsBilayer/trilayer polymer laminateCONCLUSIONSACKNOWLEDGMENTSREFERENCESFIVE Activation Mechanisms of Shape-Memory PolymersINTRODUCTIONIs stimuli-responsive good, bad, or exciting?What drives activation?HEAT ACTIVATION OF SMPsDirect heatingIndirect heatingElectro-resistive heatingInductive heatingPhotothermal heatingUnique applications of thermal activationSequential shape-recovery behaviorMultiple shape-memory effectTemperature memory effectTwo-way shape-memory effect (SME) in semicrystalline polymersConstitutive modeling of thermal actuationThermoviscoelasticity modeling approach for amorphous SMP networksConstitutive models based on phase evolution for semicrystalline SMPsSOLVENT ACTIVATION OF SMPsActivation mechanismWater-driven activationOrganic solvent—driven activationSolvent vapor—driven SMPConstitutive modelingMECHANICAL ACTIVATIONThe development of mechanical activationINNOVATIVE SMPs WITH DYNAMIC COVALENT BONDSSMPs with light-sensitive dynamic covalent bondsShape-memory based on photoreversible covalent bondsShape-memory based on light-induced isomerizationLight-induced free radical chain transferSMPs with thermal-sensitive dynamic covalent bondsSMPs with reversible Diels—Alder reactionSMPs with thermally induced bond exchange reactionsCONCLUSIONSREFERENCESSIX Applications of Shape-Memory PolymersINTRODUCTIONAEROSPACE APPLICATIONSDeployable structuresMorphing wingAUTOMOTIVE APPLICATIONSBIOMEDICAL APPLICATIONSOrthopedic devicesCardiovascular applicationsOphthalmic applicationsTissue engineeringOther medical applicationsCONSUMER APPLICATIONSINDUSTRIAL APPLICATIONSCONCLUSIONREFERENCES
 
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