Investigation of Structure and Morphology Dynamics in Tin Fluorophosphate Glass − Polyethylene Hybrids Using Solid-State 1H, 13C, and 31P MAS NMR

Abstract

The variations in morphology and local structure in a series of tin fluorophosphate glass-polyethylene (TFPPE) hybrids were investigated using solid-state 1H, 13C, and 31P MAS NMR. The combination of direct polarization 13C MAS NMR experiments with various delay times and carbon spin−lattice relaxation filtered cross-polarized MAS NMR experiments allowed quantification of the monoclinic, orthorhombic, amorphous, and intermediate phases in the low-density polyethylene (LDPE) component of the TFPPE hybrids. These 13C MAS NMR results showed an increase in the crystallinity with the addition of tin fluorophosphate (TFP) glass into the hybrids. The 31P MAS NMR spectra reveal major changes in the local structure of the TFP glass component, with several new phosphorus species being formed during the production of the hybrid. The results of the 1H-13C and 1H-31P 2D wide line spectroscopy experiments demonstrate that all of these new phosphorus species are spatially correlated with the two new proton species that ...