6533b85bfe1ef96bd12ba96c
RESEARCH PRODUCT
Small-angle x-ray scattering experiments for investigating the validity of the two-phase model
Gert StroblN. Müllersubject
Linear low-density polyethylenechemistry.chemical_classificationchemistry.chemical_compoundMaterials scienceVolume (thermodynamics)chemistryScatteringSmall-angle X-ray scatteringAnalytical chemistryPhase modelLamellar structurePolymerPolyethylenedescription
A New method for evaluating SAXS curves of polymer samples with lamellar structure is applied to two typical scattering curves measured with a solution-crystallized linear polyethylene and a melt-crystallized branched polyethylene respectively. The method permits a rigorous check of the validity of the two-phase model and yields, without additional measurement, the volume fractions of the two phases and the difference in their densities. The densities can than be obtained by measuring the overall density of the sample. The results are: ρc = 0.996 g/cm3,ρa = 0.854 g/cm3, wa = 0.20 for the solution-crystallized sample; ρc = 0.967 g/cm3,ρa = 0.850 g/cm3, wa = 0.36 for the melt-crystallized sample.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1973-06-01 | Journal of Polymer Science Part A-2: Polymer Physics |