Polyamides from lactams via anionic ring-opening polymerization: 3. Rheology

✍ Scribed by Raju S. Davé; Robert L. Kruse; Kishore Udipi; Donald E. Williams

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 685 KB
• Volume: 38
• Category: Article
• ISSN: 0032-3861
• DOI: 10.1016/s0032-3861(96)00568-x

✦ Synopsis

This paper summarizes a study on the time-dependent growth of complex viscosity during the anionic ringopening polymerization of caprolactam employing isophthaloyl-bis-caprolactam and caprolactammagnesium-bromide as initiator and catalyst. The complex viscosity of the system-nylon 6 polymerizing in its monomer-has been defined over the temperature range of 120-160°C by in situ mixing and polymerizing two caprolactam streams, one containing initiator, the other containing catalyst, between oscillating platens of a Rheometrics rheometer. Isothermal rheometry at five temperatures was accomplished for one initiator/catalyst combination. @