6533b828fe1ef96bd12878b5

RESEARCH PRODUCT

Calculation of small-angle neutron scattering by macromolecules in the semicrystalline state

M. DettenmaierE. W. FischerManfred Stamm

subject

Polypropylenechemistry.chemical_classificationMaterials sciencePolymers and PlasticsThermodynamicsPolymerNeutron scatteringSmall-angle neutron scatteringlaw.inventionCondensed Matter::Materials Sciencechemistry.chemical_compoundCrystallographyColloid and Surface ChemistrychemistryDiffusion processlawTacticityMaterials ChemistryPhysical and Theoretical ChemistryCrystallizationBiological small-angle scattering

description

The conformation of macromolecules in the semicrystalline state has been studied by various authors with respect to the validity of the adjacent re-entry — or switchboard model by application of small-angle neutron scattering. Analytical as well as Monte-Carlo calculations show that the experimental results for melt crystallized polyethylene and isotactic polypropylene can be interpreted on the basis of the solidification model. In this model it is assumed that crystallization occurs by straightening of coil sequences without a long range diffusion process.

https://doi.org/10.1007/bf01466672