Deintercalation of a chemically switchable polymer from a layered silicate nanocomposite

• Published in: Journal of polymer science. Part B, Polymer physics Vol. 41; no. 24; pp. 3151 - 3159
• Main Authors: Vohra, Vaishali R., Schmidt, Daniel F., Ober, Christopher K., Giannelis, Emmanuel P.
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 15-12-2003
• Subjects: deintercalation; deprotection; mixing; nanocomposites; poly(tetrahydropyranyl methacrylate); polymers; silicate; supramolecular structure; WAXS
• ISSN: 0887-6266; 1099-0488
• DOI: 10.1002/polb.10719

The phenomenon of intercalation is widely known as a key process in the area of polymer/layered silicate nanocomposites. In the formation of such nanocomposites, a polymer chain is intercalated between the layers of a layered (silicate) host, typically giving a well‐ordered multilayered stack with a repeat distance of only a few nanometers. Intercalated systems are excellent models for studies of confined geometries, and they often display enhanced material properties as well. In this study, we examined a series of polymers in which it was possible to reverse the intercalation process (i.e., to achieve deintercalation). Homopolymers and copolymers of poly(methyl methacrylate) and poly(tetrahydropyranyl methacrylate) (PTHPMA) were intercalated into an organically modified synthetic fluoromica. Thermally induced deprotection of the tetrahydropyranyl group resulted in the transformation of PTHPMA into poly(methacrylic acid), which was then observed to deintercalate from the silicate host. X‐ray diffraction and thermogravimetric analysis were used to study the deintercalation process. © 2003 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 41: 3151–3159, 2003