Polymer Engineering and Science · 1987 · 20 citations · 2 references
Natural SciencesMaterials EngineeringMaterials SciencePolymer ChemistryPolymer EngineeringPolymer MaterialsDissolution MediaPolymer Phase BehaviorDilute Solution PropertiesGlassy MatrixGlassy StateLaser InterferometryLight IntensityPolymer Molecular Weight DistributionPolymethyl MethacrylateWeight-average Molecular Weight
Abstract During the dissolution process, polymer in the glassy state is, transported into a dilute solution. In some cases, a transition layer can be measured using laser interferometry. This layer is seen as a difference in reflected light intensity between the bare substrate and the maximum during dissolution. When poly(methyl methacrylate) dissolves in methyl ethyl ketone, the layer is not detectable below a polymer number‐average molecular weight of about 30,000. The layer becomes more pronounced as molecular weight of polymer increases.
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