GPC, a sub-category of SEC, is an extremely useful method to characterize molecular weight distribution of a sample (Mn, Mw, Mv, Mz, Mz+1, PDI, ...). It can also be used for branching characterization with the viscometer.
The structural characterization platform of the PYRIDINE project is equipped with some of the most advanced instruments in the world to perform the most thorough analysis of your samples:
GPC, a sub-category of SEC, is an extremely useful method to characterize molecular weight distribution of a sample (Mn, Mw, Mv, Mz, Mz+1, PDI, ...). It can also be used for branching characterization with the viscometer.
Preparative GPC allows the separation by means of GPC. This allows to separate a polymer with an initially broad weight distribution (PDI > 2) into many fractions with each a very narrow molecular weight distribution (typically PDI ~1.1-1.2)
Asymmetric Flow Field-Flow Fractionation (AF4) is a powerful technique based on size exclusion principles in a microfluidic channel dictated by laminar parabolic flow. As opposed to common size exclusion chromatography techniques, samples can be either dissolved or dispersed in a solvent (water, THF, ...) with the use of a surfactant, and smaller particles/molecules will flow faster and come out first (in regular FFF mode). Combined to a multi-angle light scattering (MALS, 20 angles) from 7° to 173°, an online DLS and a UV-vis DAD detector, it is perfectly suitable for the fractionation and characterization of a large variety of samples (molecules, polymers, proteins, inorgnaic particles, ...).
The Brookhaven Omni, combined with its autotitrator, is capable of performing many types of measurements to determine either the size distribution (through dynamic light scattering, DLS) or the zeta potential (through either electrophoretic light scatering, ELS, or phase angle light scattering, PALS). With the autotitrator, it is possible to automate pH-dependent measurement such as the determination of the isoelectric point (by ELS/PALS) or to look at colloïdal stability vs pH (by DLS).
The XRD Brüker D8 Advance is a powder XRD instrument to measure powder XRD diffractograms of samples. Very useful for the determination of polymer crystallinity or to follow any changes on a diffracting solid (either organic or inoganic).