• Vandermeer, Charlotte
• Bowmaker, Graham A.
• Zujovic, Zoran
• Kilmartin, Paul A.
• Ray, Sudip

Abstract

<jats:title>Abstract</jats:title><jats:p>Intermolecular interactions and molecular dynamics in thin films of high‐density polyethylene (HDPE) containing a high loading of Grape Marc Extract (GME) were analyzed by solid‐state NMR. Optical microscopy (OM), Scanning Electron Microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC) studies were used to corroborate the findings. The OM and SEM images and <jats:sup>1</jats:sup>H‐<jats:sup>13</jats:sup>C RAMP CP/MAS (ramped amplitude cross‐polarization/magic‐angle spinning) spectra of HDPE, HDPE‐GME, and GME confirmed the incorporation of the GME into the HDPE structure. The results were compared to those for an unfilled HDPE film. The influence of GME on enhancing the amorphous nature of HDPE, altering the crystalline melting behavior and possible intermolecular interactions were evident from the DSC and FTIR. The NMR spin‐diffusion and <jats:italic>T</jats:italic><jats:sub>1</jats:sub>(<jats:sup>1</jats:sup>H), <jats:italic>T</jats:italic><jats:sub>2</jats:sub>(<jats:sup>1</jats:sup>H), <jats:italic>T</jats:italic><jats:sub>1ρ</jats:sub>*(<jats:sup>13</jats:sup>C), <jats:italic>T</jats:italic><jats:sub>1ρ</jats:sub>(<jats:sup>1</jats:sup>H) relaxation and variable contact time experiments revealed the interactions and dynamics at the sub‐micron level.</jats:p>

Topics

• density
• amorphous
• scanning electron microscopy
• experiment
• thin film
• molecular dynamics
• differential scanning calorimetry
• optical microscopy
• Nuclear Magnetic Resonance spectroscopy
• Fourier transform infrared spectroscopy
• spinning