Gel Permeation Chromatography (GPC)

Wednesday, November 3rd, 2010

The most widely used method for the determination of polymer molecular weight and molecular weight distribution.

Liquid Chromatography Mass Spectroscopy – Quadrapole Time Of Flight (QTOF)

Wednesday, September 1st, 2010

QTOF LCMS is one of the most advanced identification methods available. Identifications are based upon retention time, accurate mass to four decimal places and MS/MS fragmentation patterns.

X-Ray Diffraction

Friday, July 30th, 2010

XRD is often used for phase identification or for determination of the percent crystallinity. A material must be crystalline for XRD.

Ultra Violet (UV-Vis) Spectroscopy

Friday, July 30th, 2010

UV-Vis spectroscopy determines the absorption spectrum for the sample in the UV and visible wavelength region.

Transmission Light Microscopy

Friday, July 30th, 2010

This technique is best for samples which are partially transparent or for the observation of fine powders. Digital images of the sample are captured allowing the determination of object size. This method is appropriate for objects down to one micron in size.

Titrimetry

Friday, July 30th, 2010

This is a quantitative method generally applied to determine the concentration of an  acid or base. Other typical examples include the determination of the hydroxyl content.

Tensile Strength Testing

Friday, July 30th, 2010

Measures the force required to break a specimen (ultimate strength) and the extent of elongation of the specimen at the break point.  Data includes a stress-strain diagram related to the tensile modulus of the test specimen.

Transmission Electron Microscopy

Friday, July 30th, 2010

TEM is one of the highest resolution imaging methods  allowing sub nanometer resolution. It is required that the material be transparent to electrons or that it be particulate. TEM is appropriate for the analysis of nanometer sized objects.

Solution Viscosity

Friday, July 30th, 2010

Relative Viscosity is the ratio of the viscosity of the solution to the viscosity of the solvent. This is a frequently used quality control measure in the polymer industry to indicate molecular weight.

Specific Gravity

Friday, July 30th, 2010

The ratio of the density of a substance to the density of water under spefied conditions. This measurement can be performed on solids or liquids.