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It is unclear what kind of effect the spin probe might exert on the UCST phase diagram. In view of the greater sensitivity of ESR to a smaller length scale, it is possible to detect the local heterogeneity in the blends at temperatures appreciably higher than the UCST temperatures obtained ...
A third method, used both commercially and in the laboratory, is mixing via reaction such as the in situ polymerization of a monomer containing a polymer in solution. Blend preparation has been reviewed in the literature.6, 7 Each method has its own advantages and problems. 5.2.1 Mechanical ...
2.1.1Condensationreaction （缩合反应）Atypicalcondensationreactionisthereactionbetweenaceticacidandethylalcohol CH3COOH+C2H5OHCH3COOC2H5+H2O→ Twoimportantpointstonotearethatasmallmolecule,water,isproducedbythereaction.Alsotheproductethylacetateisknownasanester.2.1.2Functionality（官能度）Thenumberofsitesat...
What Is a Polymer? Polymers are materials made of long, repeating chains of molecules. The materials have unique properties, depending on the type of molecules being bonded and how they are bonded. Some polymers bend and stretch, like rubber and polyester. Others are hard and tough, like ...
HereisMonomer:HereisPolymer:Twotypesofpolymerizationarerecognized:(1)Condensationpolymerization（缩聚）and(2)Additionpolymerization（加聚）.Apolymer-formingreactioninvolvingeliminationofasmallmoleculesuchaswateroralcoholbetweenmonomerunitsisdescribedascondensationpolymerization.Inadditionpolymerization,unsaturatedorcyclic...
by anionic polymerization, including the running of the chain termination reaction with dialkyl ketones, and method for producing a block copolymer or a linear polymer n- or alkyl glycidyl ether.クノル,コンラートガウゼポール,ヘルマン
•Whenalltherepeatingunitsalongachainareofthesametype,theresultingpolymeriscalledahomopolymer(均聚物).•Chainsmaybecomposedoftwoormoredifferentmerunits,inwhataretermedcopolymers(共聚物).4.5MOLECULARWEIGHT •Extremelylargemolecularweightsaretobefoundinpolymerswithverylongchains.•Ordinarily,anaveragemolecular...
This reaction parameter was originally used in gas synthesis (e.g., ozone formation). A dimensionless reaction parameter S can then be written as [1]S=WτplasmapVplasmaTT0 with the power input W, the residence time in the plasma zone τplasma, the pressure p, the volume of the plasma ...
What makes a material transparent is the intrinsic arrangement of its atoms and electrons. When the incident photons have a sufficient energy to make the electrons of the semiconducting material move to a higher energy state level, light passes through that material, making it opaque (Fig. 3A)....