Polymer De-Formulation Using Centrifugal Evaporation

Polymer stabilizers give new polymer compounds many of their important higher performance characteristics. Such additives can extend the life of plastics and increase their range of use by helping plastic maintain its strength and colour consistency.

Great Lakes chemical company is involved in polymer additive production, their researchers develop new products and de-formulate competitors’ products for new development and to compare them with their own products.

Polymer De-Formulation

The polymer additives being analyzed are resistant solid granules, making analysis difficult. The granules are treated using toluene solvent, agitated to dissolve on a heater/stirrer, the solids are then separated and treated.

Next the solvent is evaporated, previously with a rotary evaporator, but now with a Genevac EZ-2 Plus Personal Evaporator. The integrated refrigerated cold trap rapidly and safely captures 98% of the vapor in the condenser and the remaining in the catch pot coupled to the vapor output. Previously, toluene vapor was continuously released into the fume extraction system.

The dry residue is prepared for reverse-phase chromatography utilizing acetonitrile/formic acid, then analysis by UV or mass spectrometry and chromatograph.

Advantages of Genevac EZ-2

David Clayton, senior analytical chemist in the polymer stabilizers laboratory, stated that the entire process, which previously took seven weeks, now takes 2.5 days using the EZ-2. Waste solvent can be recovered and safely disposed. The EZ-2 is automatic, enabling safe drying of samples without any manual interference.

Acknowledgements

Produced from materials authored by David Clayton1 and Stephen Knight2 from:

1 Senior Analytical Chemist, Great Lakes Polymer Additives, Trafford Park, Manchester, UK.

2 Genevac Ltd, Ipswich, UK

This information has been sourced, reviewed and adapted from materials provided by Genevac.

For more information on this source, please visit Genevac.

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