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Polyelectrolyte Synthesis

 

ACOMP is used to monitor the synthesis of copolymeric polyelectrolytes: Unified understanding of copolyelectrolyte properties via monitoring of their synthesis, and subsequent endproduct characterization


1. Acrylamide (Aam)/ Vinyl benzene sulfonic acid sodium salt (VB) copolymerization

  • Large composition drift leads to bimodality - a first step in producing polymer blends: copolyelectrolyte and polyacrylamide.

Top: Raw ACOMP data for 10%/90% (g/g) VB/Aam copolymerization in 0.2mM NaCl.   Bottom: Comonomer conversions fVB, fAam, and cumulative and instantaneous weight average mass, Mw, and Mw,inst, respectively.

 

Top: Composition drift of VB vs. fVB for several different starting ratios of VB/Aam.   Bottom: Composition drift during polymerization, Zinst,VB vs. fVB, and evolution of conductivity s vs fVB. Inset shows average composition distribution.

 

2. Acrylamide (Aam)/[ 2-(acryloyloxy)ethyl ]-trimethylammonium chloride (Q9) copolymerization

Top: Total fractional composition drift and final Mw vs. Q9 molar %.    Bottom: Mw for several Q9/Aam copolymerization reactions

 

School of Science and Engineering, 201 Lindy Boggs Center, New Orleans, LA 70118 504-865-5764 sse@tulane.edu