Understanding molecular interactions between polymers and amino silanes

ANYL 126

Cheryl L. Loch, cloch@umich.edu1, Chunyan Chen2, Dongchan Ahn, d.ahn@dowcorning.com3, Jie Wang, jiewang@umich.edu4, and Zhan Chen, zhanc@umich.edu1. (1) Department of Chemistry, University of Michigan, 930 North University Ave., Ann Arbor, MI 48109, (2) Department of Macromolecular Science and Engineering, University of Michigan, 930 N. University Ave. Chemistry building, Ann Arbor, MI 48109, (3) Dow Corning Corporation, 2200 W. Salzburg Road, Midland, MI 48686-0994, (4) Department of Chemistry, University of Michigan, Ann Arbor, 930 North University Ave., Ann Arbor, MI 48109
The details of the diffusion of an amino silane into poly(methyl methacrylate) (PMMA) were investigated by sum frequency generation (SFG) vibrational spectroscopy. The results show that the molecular order of the polymer/silane interface exists during the entire diffusion process and is lost when the silane molecules traverse through the thickness of the PMMA film. The kinetics of the diffusion of the silane into the polymer have been deduced from the time dependent SFG signals detected from the silane molecules as they diffuse through polymer films of different thickness. Instead of diffusion, amino silanes form hydrogen bonds at the poly(ethylene terephthalate) (PET)/amino silane interface. The detailed structure of the amino silane molecules at the PET surface has been deduced from our SFG results. This research demonstrates that SFG is a powerful technique to elucidate molecular interactions between amino silanes, important adhesion promoters for polymer materials, and various polymer surfaces.

 

General Papers
7:00 PM-9:00 PM, Sunday, 28 August 2005 Washington DC Convention Center -- Hall A, Poster

Sci-Mix
8:00 PM-10:00 PM, Monday, 29 August 2005 Washington DC Convention Center -- Hall A, Sci-Mix

Division of Analytical Chemistry

The 230th ACS National Meeting, in Washington, DC, Aug 28-Sept 1, 2005