Photon transmission technique for monitoring free radical crosslinking copolymerization in various crosslinker contents


Kara S., Pekcan O.

POLYMER, vol.41, no.8, pp.3093-3097, 2000 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 41 Issue: 8
  • Publication Date: 2000
  • Doi Number: 10.1016/s0032-3861(99)00416-4
  • Title of Journal : POLYMER
  • Page Numbers: pp.3093-3097

Abstract

Photon transmission technique was used to monitor the free radical crosslinking copolymerization (FCC) of acrylamide (AAm) and N,N'-methylenebis (acrylamide) (Bis) in time. FCC experiments were performed with various Bis contents. It was observed that transmitted photon intensity, I-tr decreased dramatically at a certain gelation time, which is attributed to the increase in scattered light intensity, I-sc during macrogel formation from interconnected microgels. Increase in I-sc was modeled using Rayleigh's equation where gelation time was found to be proportional to the volume of the microgels. (C) 2000 Elsevier Science Ltd. All rights reserved.