Free radical polymerization of caffeine‐containing methacrylate monomers
Abstract
The incorporation of acrylic functionality into caffeine enables the preparation of a vast array of novel thermoplastics and thermosets. A two‐step derivatization provided a novel caffeine‐containing methacrylate monomer capable of free radical polymerization. Copolymers of 2‐ethylhexyl methacrylate and caffeine methacrylate (CMA) allowed for a systematic study of the effect of covalently bound caffeine on polymer properties. 1H NMR and UV‐vis spectroscopy confirmed caffeine incorporation at 5 and 13 mol %, and SEC revealed the formation of high molecular weight (co)polymers (>40,000 g/mol). CMA incorporation resulted in a multistep degradation profile with initial mass loss closely correlating to caffeine content. Differential scanning calorimetry, rheological, and thermomechanical analysis demonstrated that relatively low levels of CMA increased the glass transition temperature, resulting in higher moduli and elucidating the benefits of incorporating caffeine into polymers. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2015, 53, 2829–2837
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 28, 2015
- Source ID
- 10.1002/pola.27756
Entities
People
- Ashley M. Nelson
- Jessica Chau
- Sean T. Hemp
- Timothy E. Long
Organizations
- Army Research Office
- United States Army Research Laboratory
- Virginia Tech