Organic Chemicals

Polymers and Plastics are discussed on their own page here.  Other organic chemicals will be discussed on this page.

Thermogravimetry or TGA:

  • Weight of each component of liquid mixtures
  • Confirmation of a particular organic compound based on its decomposition or oxidation temperature
  • Weight of volatile or adsorbed organic solvents in various solid materials

Thermomechanical Analysis or TMA or Dilatometry:

  • Thermal expansion properties, coefficient of thermal expansion (CTE) using a dilatometer vial

Differential Scanning Calorimetry or DSC:

  • Specific heat measurement
  • Thermally induced reaction generating heat output
  • Detection of polymorphism
  • Measure the heat and temperature of crystallization upon cooling and subsequent melting temperature and latent heat upon heating
  • Measure the heat of vaporization
  • Detection of impurities or secondary components by distinct melting temperatures, crystallization temperatures, or by thermally stimulated reaction with the primary ingredient
  • Oxidation temperature and energies
  • Detect isomorphic organic components by reactions at or above the melting temperature
  • Producing a phase diagram for a physical system

FTIR or Infrared Spectroscopy:

  • Identification of bonding groups
  • Identify organic chemical
  • Identify organic contaminants

Optical Microscopy:

  • Examine liquid drop or layer for particulates
  • Examine precipitates from drying or cooling liquid
  • Examine residues of evaporated liquid

SEM/EDX:

  • Examine filtered precipitates from drying or cooling liquid and determine the elemental composition
  • Examine residues of evaporated liquid and determine the elemental composition

X-ray Photoelectron Spectroscopy or XPS or ESCA:

  • Examine filtered precipitates from drying or cooling liquid, determining the elemental composition and chemistry of the particle surfaces
  • Examine residues of evaporated liquids and determine the elemental composition and chemical phases in the residues