Lesson 1　Introduction to History of Polymer Science

    SincetheSecondWorldWar,polymericmaterialshavebeenthefastest-growingsegmentsoftheworldchemicalindustry.Ithasbeenestimatedthatmorethanathirdofthechemicalresearchmoneyisspentonpolymers,withacorrespondinglylargeproportionoftechnicalpersonnelworkinginthearea.A......查看详细>>

标签:聚合物科学与工程

Lesson 2　Basic Concepts of Polymer Science

    Almosthalfacenturyago,WolfgangOstwaldcoinedthephrase“thelandofneglecteddimensions”todescribetherangeofsizesbetweenmolecularandmacroscopicwithinwhichoccurmostcolloidalparticles.Theterm“neglecteddimensions”mighthavebeenappliedequallywelltotheworldofpolymerm......查看详细>>

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Lesson 3　Types of Polymers

    Thelargenumberofnaturalandsyntheticpolymershasbeenclassifiedinseveralways.Thesewillbeoutlinedbelow.Theearliestdistinctionbetweentypesofpolymerswasmadelongbeforeanyconcreteknowledgeoftheirmolecularstructure.Itwasapurelyphenomenologicaldistinction,basedonth......查看详细>>

标签:聚合物科学与工程

Lesson 4　Structure of Synthesis

    Asanappreciationforthemolecularstructureofpolymerswasgained,threemajorstructuralcategoriesemerged.TheseareillustratedschematicallyinFigure4.1.Figure4.1　SchematicdiagramofpolymerstructuresLinearIfapolymerisbuiltfromstrictlydifunctionalmonomers,theresultisa......查看详细>>

标签:聚合物科学与工程

Lesson 5　Polymer Morphology

    Weknowthatthegeometricarrangementoftheatomsinpolymerchainscanexertasignificantinfluenceonthepropertiesofthebulkpolymer.Toappreciatewhythisisso,thesubjectofpolymermorphology,thestructuralarrangementofthechainsinthepolymer,isintroducedhere.Althoughtheprecis......查看详细>>

标签:聚合物科学与工程

Lesson 6　Polymer Solutions and Solubility

    Thethermodynamicsandstatisticsofpolymersolutionsisaninterestingandimportantbranchofphysicalchemistry,andisthesubjectofmanygoodbooksandlargesectionsofbooksinitself.Itisfarbeyondthescopeofthischaptertoattempttocoverthesubjectindetail.Instead,wewillconcentra......查看详细>>

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Lesson 7　Transitions in Polymers

    TheGlassTransitionIthaslongbeenknownthatamorphouspolymerscanexhibittwodistinctlydifferenttypesofmechanicalbehavior.Some,likepolymethylmethacrylate(Lucite,Plexiglas)andpolystyrene,arehard,rigid,glassyplasticsatroomtemperature,whileothers,forexample,polybut......查看详细>>

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Lesson 8　Step-Growth(Condensation)Polymerization

    Polymerizationreactionsmaybedividedintotwocategoriesaccordingtothemechanismbywhichthechainsgrow.Instep-growthpolymerization,alsoknownascondensationpolymerization,chainsofanylengthsxandycombinetoformlongerchains:　　　x-mer+y-mer→(x+y)-mer　　　　stepgrowth(8.1a)......查看详细>>

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Lesson 9　Free-Radical Addition(Chain-Growth)

    Oneofthemostimportanttypesofadditionpolymerizationisinitiatedbytheactionoffreeradicals,electricallyneutralspecieswithanunsharedelectron①.Inthedevelopmentstofollow,adot(·)willrepresentasingleelectron.Thesinglebond,apairofsharedelectrons,willbedenotedbyadou......查看详细>>

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Lesson 10　Emulsion Polymerization(1)

    Theprecedingdiscussionoffree-radicaladditionpolymerizationhasconsideredonlyhomogeneousreactions.Considerablepolymerisproducedcommerciallybyacomplexheterogeneousfree-radicaladditionprocessknownasemulsionpolymerization.ThisprocesswasdevelopedintheUnitedStat......查看详细>>

标签:聚合物科学与工程