New Effects in the Poly-N-Vinylcaprolactam/Titanium(IV) Oxides Nanocomposite System and Their Nature

• Published in: Crystallography reports 2018-03, Vol.63 (2), p.261-265
• Main Authors: Timaeva, O. I., Kuz’micheva, G. M., Chihacheva, I. P.
• Format: Article
• Language: English
• Subjects: AMIDES; Anatase; Atomic structure; CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Crystallography and Scattering Methods; DRYING; GRINDING; INFRARED SPECTRA; Infrared spectroscopy; Interlayers; MATERIALS SCIENCE; MIXING; MOLECULES; NANOCOMPOSITES; Nanomaterials and Ceramics; NANOPARTICLES; OXYGEN; Oxygen atoms; Physics; Physics and Astronomy; Polyvinyl chloride; PVC; SOLID SOLUTIONS; TEMPERATURE RANGE 0273-0400 K; Titanium dioxide; TITANIUM OXIDES; Water chemistry; X-RAY DIFFRACTION
• ISSN: 1063-7745; 1562-689X
• DOI: 10.1134/S1063774518020293

Nanocomposites based on poly-N-vinylcaprolactam (PVC), characterized by different drying temperatures of aqueous PVC solution at 25°С (PVC25) and 40°С (PVC40), with titanium(IV) oxide nanoparticles (TONs) (η-phase (TP: TiO 2 – x · m H 2 O) with a superstructure to the anatase structure and ordered solid solution with partial replacement of oxygen atoms in the η-phase with peroxo group O 2 2– (PP: TiO x (O 2 ) 2 – x · n H 2 O)) have been obtained for the first time and characterized by X-ray diffraction and IR spectroscopy. It is found that a common feature of TP/PVC and PP/PVC obtained by dry mixing and grinding is the decrease in the number of water molecules for TP and PP in the interlayer space of the structure and their attachment to the PVC amide groups; the differences are related to the specificity of PVC behavior in these systems: mechanodestruction of PVC in PP/PVC40 and different numbers of water molecules in PVC25 and PVC40.