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1、1.用英文作自我介绍回答问题：请简单说明什么事聚合物的粘弹性，并说明它与低分子液体流动的区别？朗读并翻译以下段落Largerdiameter(50-10nm)vaporgrowncarbonnanofiberscanbewelldispersedinpolypropylenemelt,whilesingewallcarbonnanotubes(swnt)werenotaswelldispersed,techniquessuchasend-groupfunctionalization,useofionicsurfactants,shearm
2、ixingandplasmacoatinghavebeenusedtoimprovedispersionandexfoliationofcarbonnanotubesinpolypropylenecompatibilitywithfillershasbeenimprovedbymatrixmodificationbygraftingitwithreactivemoieties,suchasacrylicacid,acrylicesters,andmaleicanhydride.2.高聚物与高聚物之间相容性的好坏可以通过什么方法加以评价？A
3、newcopolyamide,nylon611,waspreparedbyhydrolyticpolymerizationandmeltpolycondensationandcharacterizedbymeansofintrinsicviscosity,fouriertransforminfraed(ftir)spectroscopyanddifferemtialscanningcalorimetry(DSC)inthispaper.itwasfoundthattheintrinsicviscosityofnylon611copolym
4、erizationtimeundervacuum.however,theincorporationofcaprolactamintonylon11chainsdidnottransformthecrystalphaseofnylon11.3.请问聚合物分子量的测试方法有哪些？并描述其中两种测试方法的测试原理？Solutionsofpoly(ethylene-co-vinylalcohol)orevoh,rangingincompositionfrom56to71wt%vinylalcohol,canbereadilyelectrospun
5、atroomtemperaturefromsolutionsin70%2-propanol/water.Thesolutionsarepreparedat80?Andallowedtocooltoroomtemperature.Interestingly,thesolutionsarenotstableatroomtemperatureandeventuallythepolymerprecipitatesafterseveralhours.However,priortoprecipitation,electrospinningisexte
6、nsiveandrapid,allowingcoverageoffibersonvarioussubstrates.Fiberdiametersofca.0.2-0.8umwereobtaineddependinguponthesolutionconcentration.4.用于生产合成纤维的高分子的分子量与橡胶、塑料相比有什么不同，结构有何差异？Theuseofmacromonomersisaconvenientmethodforpreparingbranchedpolymers.However,graftcopolymersobtai
7、nedbyconventionalradicalcopolymerizationofmacromonomersoftenexhibitpoorlycontrolledmolecularweightsandhighpolydispersitiesaswellaslargecompositionalheterogeneitiesfromchain-to-chain.Incontrast,thedevelopmentof“living”/contolledradicalpolymerizationhasfacilitatedtheprecise
8、synthesisofwell-definedpolymerswithlowpolydispersitiesinadditiontoenablingsyntheticchemiststopre
