|
|||||
|
|
Investigation of Steel/Epoxy Adhesion Durability Using Polymeric Coupling Agents III. Influence of Coupling Agent Layer Thickness |
|
| Authors: | R G Schmidt J P Bell |
| Affiliation: | 1. Polymer Science Program and Dept. of Chemical Engineering, U-136 , University of Connecticut , Storrs , CT , Q6268 , U.S.A.;2. Dow Corning Corp., Research &3. Development , Mail # C41D01, Midland , MI , 48686 , U.S.A.;4. Polymer Science Program and Dept. of Chemical Engineering, U-136 , University of Connecticut , Storrs , CT , Q6268 , U.S.A. |
| Abstract: | Steel/epoxy peel specimens were prepared using ethylene-mercaptoester (EME) copolymer coupling agents (90 wt% mercaptoester units) applied in thickness ranging from 25 to 350 Å. An optimum thickness of approximately 140 Å, which corresponded to an over 200% increase in peel strength when compared to 50 Å thick samples, was determined from ellipsometry and 90° peel strength measurements. The corrosion protection obtained was essentially independent of coupling agent thickness. |
| Keywords: | Steel/epoxy bonding adhesion durability corrosion protection coupling agents coupling agent thickness interfacial bonding |