Chemical modification of polynorbornene. II. Extended sulfonation processes

✍ Scribed by J. P. Planche; A. Revillon; A. Guyot

• Book ID: 105337508
• Publisher: John Wiley and Sons
• Year: 1990
• Tongue: English
• Weight: 463 KB
• Volume: 28
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/pola.1990.080280606

✦ Synopsis

Abstract

In the sulfonation of polynorbornene in dilute solution, the nature of the sulfonation agent mainly influences the reaction rate, according to its strength and also affects some side reactions (chain scission and crosslinking). The sulfonation can be carried out in suspension after swelling the highly porous powder in dichloroethane up to a 55% sulfonation ratio with preservation of the initial particular nature of the polymer; the latter may be then either partly or totally water soluble, depending on the initial size of the particles. Partial sulfonation, leading to ionomers, may be carried out in bulk at moderate temperature, in a mixing chamber, after gelification of the polymers, plasticized with CCl~4~.