Topic molar mass

Products molar mass

Thermal Field-Flow Fractionation: Ultra-Broad Polymer Separation

The new Postnova TF2000-MALS series is a truly unique and innovative technology for polymer/particle separation and characterization. The analysis can be achieved over a huge molar mass and size range and under extremely gentle conditions without any shear forces and sample degradation more

Break-through in High Temperature Polymer Separation Technology

The AF2000 HT Series is the world's first commercial HTFFF instrument available and was invented and patented by Postnova Analytics. High Temperature Field-Flow Fractionation is a brand new technology ideally suited for the advanced separation of high molar mass polymers, such as polyethylene and polypropylene. more

News molar mass

• InnovationsAward for Postnova at analytica 2008

  At this years analytica 2008 trade show Postnova Analytics was awarded with the GIT InnovationsAward. Postnova won the silver medal for the development of the TF2000-MALS Series, which is a new type of separation and characterization method for polymers and Nanoparticles based on Thermal Field-Flow more

White papers molar mass

• Field-Flow Fractionation - The Universal Separation Principle for Particle and Macromolecule Characterization
  

  High molecular weight polymers, bio molecules or particles in a range of a few nanometers up to several microns are more and more important in science and technology. Many applications are based on the specific properties of these materials. For this reason, an exact knowledge of the molar mass or particle sizes distribution is essential for later application as well as for optimization of the production processes or quality control. In addition the knowledge about the chain structure of macromolecules or biopolymers as well as about the shape of particles is often necessary. For this reason those samples, which often can be very complex systems, have to be separated according to parameters such as e.g. hydrodynamic volume or molecular weight. After the separation process the resulting narrow dispersed fractions are detected with different techniques. more

• Asymmetric Flow Field Flow Fractionation (AF4) - A Powerful Method for Polymer Characterization

  The AF4-MALS combined technique can serve as a routine method for polymer analysis and characterization. AF4 provides separation efficiency entirely comparable with traditionally used and so far dominating SEC. In addition, it yields superior separation of branched polymers, polymers containing ultra high molar mass fractions up to at least 108 g/mol, and nanoparticles. This contribution outlines the theoretical background of the method and shows several examples of its use, e.g. separation of high molecular weight polymers and particles. While SEC will certainly continue to be the most frequently employed method of polymer analysis, for many samples the description of molecular structure is more detailed if both SEC and AF4 are used. The possibility to run both SEC and AF4 on the same experimental set-up makes the AF4 method a powerful and versatile tool for the characterization of a variety of synthetic and natural polymers and related materials. more

Websites molar mass