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Grinding Polymers for Qualitative and Quantitative Analysis

SPEX SamplePrep, LLC
17 Nov 2014

In this application note the 6750 Freezer/Mill was used for grinding compact synthetic fabrics as well as polymer yarns, fleece materials and filaments (polypropylene, polyethylene or polyester). Grinding was required for accurate qualitative and quantitative analysis of additives contained in synthetic materials (e.g. antioxidants using HPLC and INOC-Test). The 6750 Freezer/Mill is ideal for this application, providing the required particle size reduction in a relatively short time period.

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6875 Freezer/Mill®

SPEX SamplePrep, LLC

The 6875 Freezer/Mill® is a large cryogenic mill that accommodates sample sizes ranging from 0.1 - 100 grams. Specifically designed for cryogenic grinding and pulverizing tough and/or temperature sensitive samples in a grinding vial immersed in liquid nitrogen. The new high resolution display is user-friendly and shows the each stage of the grinding process. It also shows the Run history, Training videos and manuals and a complete listing of accessories.  

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Refrigerators Freezers and CryogenicsRefrigerators, Freezers & Cryogenics can be used for preservation or experimental purposes. Types of freezers include deep freeze, -80C°C, ultra-low temperature, explosion proof, cryogenic and controlled rate freezers. Freezing is also used in freeze-drying equipment for dehydration processes. Feature to consider in freezers include temperature control and recorders, failure alarms and self-closing mechanisms.Particle CharacterizationParticle characterization instruments are used to determine particle size distribution, shape, surface area, zeta potential, density and porosity of particles and materials. Multiple tecchniques are available for determining particle size, shape and count including dynamic light scattering (DLS), laser diffraction, electrozone (Coulter technique), imaging particle analysis and single particle optical sensing. Determine the density of your material with a gas pycnometer or examine its surface area and porosity with gas adsorption analyzers and mercury porosimeters. Find the best particle characterization instruments in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Sample ProcessingSample processing is required to prepare samples prior to analysis. Technologies used for sample processing include homogenizers, grinders, mills and mixers.PolymersPolymers are large molecules made up of many repeat units. Natural polymers such as DNA and proteins are essential to life, whereas synthetic polymers such as polystyrene and polyethylene are used widely due to their functionality. Typical techniques for analysis include GPC, SEC, DSC, FT-IR and NMR.

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