Molecular size measurements of synthetic polymers

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  • Measurement of molecular weight, no need for relevant calibration standards
  • Molecular weight/size and structural information needed to develop new polymers

Malvern Instruments has introduced a new gel permeation chromatography/size exclusion chromatography (GPC/SEC) system for the analysis of synthetic polymers.

Omnisec from Malvern Instruments

Omnisec from Malvern Instruments for the analysis of synthetic polymers (source: Malvern Instruments)

Molecular weight/size and structural information needed to develop new polymers

The polymer industry is actively engaged in developing new materials with key performance attributes. Priorities include the introduction of renewable polymers to replace those derived from fossil fuels, formulating materials with improved performance to volume gearings for packaging applications, and enhancing polymer recyclability or biodegradability. Polymer scientists require absolute molecular weight, size and structural information in order to manipulate polymer properties to meet these goals.

Measurement of molecular weight, no need for relevant calibration standards

The Omnisec system provides accurate molecular weight and molecular size measurements and detailed structural information needed in synthetic polymer research. The Omnisec platform features precise sample separation in the Omnisec Resolve module with a fully integrated, high sensitivity multi-detector array in the Omnisec Reveal module.

The system is capable to accurately measure the molecular weight of polystyrene, polyvinyl chloride (PVC) and polymethyl methyacrylate (PMMA) with no need for relevant calibration standards. ‘The Mark–Houwink plot – Differentiation of Branching and Composition’ demonstrates how the Mark-Houwink plot may be used to determine and compare polymer structure. The data presented show that the Omnisec system is able to detect differences in branching with very good levels of sensitivity, through its powerful light scattering detector and viscometer.



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