Surface Structure of Acrylate Polymer Adhesives

Abstract

Total internal reflection infrared (IR) absorption and visible-IR sum-frequency spectroscopies were used to study the role of acrylic acid in the evolution of surface structure in a poly(butyl acrylate)-based pressure-sensitive adhesive during the drying process. By monitoring these spectral responses and calculating the heterospectral correlation coefficients, we established that acrylic acid alters the nature of the molecular interactions at the surface. In the absence of acrylic acid, butyl acrylate orientation is driven by the packing of the polymer as the water evaporates. When acrylic acid is present, a rapid ordering of the copolymer takes place as a result of favorable hydrogen-bonding interactions with the surface.

Adhesive Polymers as Efficient Binders for High-Capacity Silicon Electrodes

“…As illustrated by the FT-IR spectra in Figure S1, the peaks at 1692 and 1455 cm –1 are attributed to the CO stretching and CO bending, respectively, in −COOH groups, verifying the presence of AA segments. It should be noted that the intensity of the peak at 2931 cm –1 , which is ascribed to the C–H stretching in the −CH 2 or −CH 3 groups on the 2-EHA, gets higher following the increased molar ratios of 2-EHA contents, consistent with previous reports . Moreover, as shown in the 1 H NMR spectra of PSAs, PAA, and poly­(2-EHA) (Figures A and S2–S6), the integration of peak b, which corresponds to the proton of carboxylic acid, decreases with the increased molar ratios of 2-EHA when fixing the peak integration of −CH 2 units adjacent to the ester group, confirming the successful synthesis of the copolymers with different 2-EHA ratios.…”

Adhesion Control of Elastomer Sheet on the Basis of Interfacial Segregation of Hyperbranched Polymer

“…However, the precise control and design of the adhesion strength, especially as a function of time, can be difficult to achieve, because of a lack of understanding of the adhesion mechanism based on molecular events. Even though the adhesion phenomena have been studied from various points of view such as wetting, 1 rheology, 2 and surface chemical modification, 3 molecular events at the adhesion interface should be further investigated to realize multimaterialization with tailored physical properties and functions using adhesives.…”

Adsorption of heptane–toluene binary mixtures on a hydrophobic polymer surface

“…The homospectral correlation is generally more featurerich when applied to SFG data, as both the orientation and population of molecules at the surface contribute to the intensity of the vibrational modes. 38,[62][63][64] For example, a particular mode may have a strong IR transition dipole moment and Raman transition polarizability, but that part of the molecule may be oriented close to the plane of the surface, significantly reducing its intensity in the case of our C ∞v symmetry. The orientation and symmetry consideration is the dominant contribution to the SFG, as even molecules with strong IR and Raman transitions are SFG-silent in the bulk solution phase.…”