Determination of number-average molecular weights by elastoosmometry

✍ Scribed by Yamada, S. ;Prins, W. ;Hermans, J. J.

• Publisher: Wiley (John Wiley & Sons)
• Year: 1963
• Tongue: English
• Weight: 406 KB
• Volume: 1
• Category: Article
• ISSN: 0449-2951
• DOI: 10.1002/pol.1963.100010711

✦ Synopsis

Abstract

When a swollen elastomer is in equilibrium with a solution, the stress at constant length is a function of the chemical potential of the solvent, and thus of the concentration and number‐average molecular weight of the solute in the solution. This is used to compare the molecular weights of some polystyrene samples among each other. The method is found to give satisfactory results. The theory of the method is given and is applied to ideal rubbery networks, for which explicit free energy expressions are available. The theoretical result obtained is used to reduce the experimental data to equal extension ratios.