Options
2012
Journal Article
Titel
Interactive liquid chromatography of olefin based elastomers
Abstract
The separation of olefin-based elastomers such as ethylene-propylene (EP) and ethylenepropylenediene (EPDM) rubbers according to their chemical composition cannot be achieved using techniques based on crystallization, which are widely used to fractionate semi-crystalline olefin copolymers. Interactive liquid chromatography using porous graphite as a stationary phase and gradients of long chain alcohols and chlorinated aromatics offers the possibility to separate these materials according to their chemical composition. Coupling the high performance liquid chromatography (HPLC) separation according to the chemical composition in the first dimension with size exclusion chromatography (SEC) according to the molar mass in the second dimension yields the complete molecular heterogeneity of these materials for the first time.
Author(s)