ResourceSeparations
Structural Changes in Polymers by Means of Cryogenic Grinding
23 Sept 2014This application note demonstrates that cryogenic mechanical milling using the Freezer/Mill causes changes to structure, thermal behavior and morphology of homopolymers and polymer compounds.
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6875 Freezer/Mill®
SPEX SamplePrep, LLCThe 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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Sample PreparationSample preparation can improve the quality and speed of separation techniques. Products to assist sample preparation include filtration equipment, evaporators, membranes and sieves.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.Thermal Analysis EquipmentThermal analysis equipment is used for measuring heat flow, weight loss, dimension changes or thermomechanical properties and is important for analyzing a material’s performance and stability. Thermal analysis equipment includes differential scanning calorimeters (DSC), thermogravimetric analyzers (TGA), thermomechanical analyzers (TMA), dilatometers, thermometers, vapor sorption analyzers, boiling and melting point apparatus. Thermal analyzers can reveal properties such as melting, crystallization and glass transitions or other processes such as oxidation, decomposition, volatilization, as well as coefficients of thermal expansion and modulus. Find the best thermal analysis equipment in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.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.MillingMilling is the process of grinding, crushing, or cutting materials into smaller parts. In scientific research, it plays a crucial role in sample preparation for analysis in areas such as food, pharmaceuticals, and materials science. Explore milling equipment in our peer-reviewed product directory; compare products, check reviews, and get pricing directly from manufacturers.Temperature ControlTemperature controlled processes are experiments carried out using ovens, furnaces, incubators, hotplates, refrigeration and freezers.