TY - JOUR
T1 - Cationic polyacrylamide adsorption on epoxy surfaces
AU - Angelopoulos, Anastasios P.
AU - Benziger, Jay Burton
AU - Wesson, Sheldon P.
N1 - Funding Information:
The authors thank TRI/Princeton and IBM Microelectronics, Endicott, NY, for their assistance with making equipment available for the experimental measurements. One of us (A.A.) thanks IBM Corp. for fellowship support during his studies at Princeton.
PY - 1997/1/1
Y1 - 1997/1/1
N2 - The adsorption of a cationic polyacrylamide (acrylamide/β-methacryloxyethyltrimethylammonium methyl sulfate copolymer) onto an imidazole catalyzed bisphenol-A based epoxy resin surface was examined by surface wetting. The work of adhesion of diodomethane, ethylene glycol and water was measured an microscopically smooth epoxy surfaces using a Wilhemy plate method, in both advancing and receding modes. The cationic polyacrylamide was adsorbed from aqueous solutions as a function of the pH of the solution. In addition to the cationic quaternary amine groups along the polymer chain, there were carboxylate groups from amide hydrolysis, which had a pK(a) of 10.73. The surface wetting of neither diodomethane nor ethylene glycol was sensitive to the adsorbed polyacrylamide. Wetting of the surface by water was very sensitive to the presence of adsorbed polyacrylamide. Polyacrylamides in solutions below pH 9 adsorbed onto the epoxy surface resulting in increased water adhesion to the surface. When the polyacrylamide solution was greater than pH 9 carboxylate groups ionized and the anions inhibited adsorption of the polyacrylamide. The water wetting measurements were shown to correlate with the adsorption of Pd/Sn colloidal particles used for electroless deposition of copper circuit lines on printed circuit boards.
AB - The adsorption of a cationic polyacrylamide (acrylamide/β-methacryloxyethyltrimethylammonium methyl sulfate copolymer) onto an imidazole catalyzed bisphenol-A based epoxy resin surface was examined by surface wetting. The work of adhesion of diodomethane, ethylene glycol and water was measured an microscopically smooth epoxy surfaces using a Wilhemy plate method, in both advancing and receding modes. The cationic polyacrylamide was adsorbed from aqueous solutions as a function of the pH of the solution. In addition to the cationic quaternary amine groups along the polymer chain, there were carboxylate groups from amide hydrolysis, which had a pK(a) of 10.73. The surface wetting of neither diodomethane nor ethylene glycol was sensitive to the adsorbed polyacrylamide. Wetting of the surface by water was very sensitive to the presence of adsorbed polyacrylamide. Polyacrylamides in solutions below pH 9 adsorbed onto the epoxy surface resulting in increased water adhesion to the surface. When the polyacrylamide solution was greater than pH 9 carboxylate groups ionized and the anions inhibited adsorption of the polyacrylamide. The water wetting measurements were shown to correlate with the adsorption of Pd/Sn colloidal particles used for electroless deposition of copper circuit lines on printed circuit boards.
KW - Epoxy surfaces, adsorption on
KW - Polyacrylamide adsorption
KW - Polyacrylic acid adsorption
KW - Water wetting, epoxy surfaces
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U2 - 10.1006/jcis.1996.4573
DO - 10.1006/jcis.1996.4573
M3 - Article
C2 - 9056320
AN - SCOPUS:0030781301
SN - 0021-9797
VL - 185
SP - 147
EP - 156
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
IS - 1
ER -