Abstract:
The present work was carried out to elucidate the preparations of some polymers in addition to determination of their molecular weights .First of all Bakelite was prepared from phenol and formaldehyde added and sulfuric acid and sodium chloride .
The preparation of the plastic milk (casein) carried out by adding acetic acid to the hot milk , and preparation of nylon done by polymerization of acid and amine functions . The molecular weights determined by many methods : the average molecule weight by use :
• Colligative properties .
• GPC chromatography .
• Osmotic measurement .
• Light scattering .
• Viscosity measurement .
