Polymer Characterization Laboratory @ Northwestern University
Used for: | Polymer Synthesis/ Characterization |
FUNCTION:
This laboratory is oriented toward the polymer community, providing the researchers with space and specialized instrumentation for the physical characterization of polymeric materials. Determination of molecular weight, mechanical properties, and thermal behavior of polymer solids are routinely performed in this lab.
EQUIPMENT:
1. The chromatic Low-Angle Laser Light Scattering photometer and modified Brice-Phoenix refractive index increment apparatus are used for molecular weight characterization. Moreover, dilute solution viscometers are available for obtaining the absolute molecular weight and are thermostated for work up to 180ºC.
2. For Thermodynamic Characterization, the Perkin-Elmer DSC-7 differential scanning calorimeter is capable of automatic data acquisition and analysis of transition temperatures and heats of melting, crystallization, and reaction. The calorimeter is interfaced with a thermogravimetric analyzer (TGA), an automatic balance with microgram sensitivity, and the same data station for data acquisition and analysis of weight loss measurements. Density gradient columns are available for determining density of polymer solids.
3. Mechanical Characterization Bohlin VOR Mechanical Spectrometer is equipped for the measurement of viscoelastic properties of polymer solutions, melts, and solids at various sheer rates and temperatures.
4. The Precision Profilometer , the Tencor Model P10 surface Profiler and the Spin Coater are used for producing thin polymer films.