Effect of Hydrophobic Modification on Phase Behaviour and Rheology in Mixtures of Oppositely Charged Polyelectrolytes

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

Phase behavior and rheology of polymer mixtures comprising aqueous solutions of oppositely charged polyelectrolytes are investigated. Emphasis is put on the effects of hydrophobic modification of the polymers and addition of salt. The associative phase separation usually observed when mixing oppositely charged polyelectrolytes is effectively prevented over a large miscibility region for the hydrophobically modified polymers. Also, in the extended one-phase region, the viscosity is 3-4 orders of magnitude higher for mixed polyelectrolyte systems compared to that observed for either one of the polymers. Addition of ordinary electrolytes to the mixture decreases the viscosity strongly, and at higher electrolyte contents a phase separation is induced. A mechanism explaining the observations is proposed.

Detaljer

Författare
  • Krister Thuresson
  • Svante Nilsson
  • Björn Lindman
Enheter & grupper
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Fysikalisk kemi
Originalspråkengelska
Sidor (från-till)530-537
TidskriftLangmuir
Volym12
Utgåva nummer2
StatusPublished - 1996
PublikationskategoriForskning
Peer review utfördJa

Relaterad forskningsoutput

Thuresson, K., 1996, Physical Chemistry 1, Lund University. 35 s.

Forskningsoutput: AvhandlingDoktorsavhandling (sammanläggning)

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