Effect of solvents on the cryogenic dynamic mechanical properties of polystyrene

✍ Scribed by Morgan, R. J. ;Nielsen, L. E.

• Publisher: Wiley (John Wiley & Sons)
• Year: 1972
• Tongue: English
• Weight: 453 KB
• Volume: 10
• Category: Article
• ISSN: 0449-2978
• DOI: 10.1002/pol.1972.160100814

✦ Synopsis

Abstract

Young's modulus and mechanical damping of 15 organic liquids in polystyrene have been measured from 4°K to 250°K. The concentration was generally in the range from 10 to 15%, but the polystyrene–toluene system was investigated over the range from 0 to 16%. Some liquids cause the 40°K damping peak of polystyrene to disappear, other liquids do not. Seven of the liquids which cause the disappearance of the 40°K peak give rise to new large damping peaks at the temperature expected for the secondary glass transition temperatures of the liquids, that is, at 0.77 T~g~ of the liquids. Some of the liquids produced large unexplained damping peaks at temperatures above the expected glass transition temperatures T~g~ of the liquids. It is suggested that the γ peak in polystyrene is caused by styrene monomer.