Influence of grape marc extract on tuning the intermolecular interactions in the high‐density polyethylene. Issue 25 (15th February 2021)

• Record Type: Journal Article
• Authors: Zujovic, Zoran; Ray, Sudip; Vandermeer, Charlotte; Bowmaker, Graham A.; Kilmartin, Paul A.
• Is Part Of: Journal of applied polymer science. Volume 138:Issue 25(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-02-15
• Subjects: blends -- films -- morphology -- packaging -- spectroscopy; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.50605
• Languages: English
• ISSNs: 0021-8995

Abstract

Abstract: 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 1 H‐ 13 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 T 1 ( 1 H), T 2 ( 1 H), T 1ρ *( 13 C), T 1ρ ( 1 H) relaxation and variable contact time experiments revealed the interactions and dynamics at the sub‐micron level. Abstract : The integration of grape marc extract (GME) into the high‐density polyethylene (HDPE) structure modifies the order in the crystalline part and expands the size of semi‐rigid interphase and amorphous domains. The lamellar model used here is adapted from K. J. Fritzsching, K. Mao, K. Schmidt‐Rohr Macromolecules 2017, 50, 1521–1540.