6533b826fe1ef96bd12851f5
RESEARCH PRODUCT
Streulichtmessungen an polymerlösungen zur bestimmung der verteilungsbreite des Molekulargewichtes
Giinther MeyerhoffHrabanus Hacksubject
chemistry.chemical_classificationchemistryScatteringlawDispersityAnalytical chemistryMolar mass distributionPolymerCurvatureWeight rangeLaserIntensity (heat transfer)law.inventiondescription
By increasing the experimental accuracy of the classical light scattering technique it became possible to determine the width U = Mw/Mn − 1 of the molecular weight distribution of polymers. For this purpose a very stable laser and a lock-in-amplifier were used allowing an accuracy of 0,2–0,3% in the scattering intensity. The numerical evaluation of the polydispersity is done by a Gaus-Newton procedure analysing the small curvature of the reciprocal scattering function. In an appropriate molecular weight range U is obtained with an error between 0,01 and 0,1 depending on the width of the molecular weight distribution of the sample tested.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1978-10-01 | Die Makromolekulare Chemie |