Sorption Properties of Materials Based on Graft Polycaproamide Copolymers

Sorption of metal ions with a cation exchanger based on a graft polycaproamide copolymer was studied, and the sorption power of the material was evaluated.     

Relationship between the morphology and combustibility of fluorinated polyamide composites

The effect that polyfluorinated alcohols immobilized on montmorillonite support exert on structuralmorphological characteristics and combustibility of polymer composites was studied with 1,1,9-trihydroperfluoro- 1-nonanol as example. The relationship between the flame resistance of this heterochain polymer and its morphology was revealed by X-ray diffraction analysis, electron microscopy, DSC, and Fourier IR spectroscopy. This relationship is associated with the reorganization of the crystal and molecular structure under the influence of fluorinated organoclay, ensuring increased degree of crystallinity and redistribution of the fractions of α- and γ-crystalline forms in the polymorphic composition of polycaprolactam, making its supramolecular structure more perfect, and favoring preparation of a fluorinated material of decreased combustibility.

     

Optimization of Polymer-Analogous Transformations in Grafted Chains of Polycaproamide-Polyglycidyl Methacrylate Copolymers

Mathematical simulation and optimization of graft polymerization and polymer-analogous transformations in grafted chains of polycaproamide-polyglycidyl methacrylate copolymers were carried out.     

Polymer composites based on polythiourethane and fluorinated organomontmorillonite

Russian Journal of Applied Chemistry - The effect exerted on the mechanical properties and thermal oxidative stability of polythiourethane elastomers by new organomineral complexes based on...     

Radical Graft Polymerization of Glycidyl Methacrylate and Polycaproamide Fiber

Graft polymerization of glycidyl methacrylate to polycaproamide fiber, initiated by the highly effective redox system Cu²⁺-H₂O₂, was studied. The kinetic parameters affecting the yield of grafted polyglycidyl methacrylate and the efficiency of the graft polymerization were determined.     

Surface modification of granules of polyethylene terephthalate by fluorine-containing urethanes

The possibility of surface modification of polyethylene terephthalate granulate by fluorinated prepolymers which contain urethane groups was examined. A depth of a modified surface layer (12–18 μm) was found. The modified system reduces a crystallinity of a polymer and varies thermal transitions, which characterize a mobility of structural units of a macromolecular chain. An increase in hydrolytic and thermal-oxidative stability of the modified polyethylene terephthalate was demonstrated.     

Effect of 1,1,3-trihydroperfluoro-1-propanol on the properties of poly(ethylene terephthalate) films

Modification of poly(ethylene terephthalate) films with 1,1,3-trihydroperfluoro-1-propanol was performed. Introduction of the modifier favors an increase in the degree of crystallinity and orientation of glycol residues in the trans position, thus improving the operation characteristics of the polyester.     

Intensification of Preparation of Modified Polycaproamide Fiber

A procedure was developed for graft polymerization of dimethylaminoethyl methacrylate onto polycaproamide using a redox system whose components are added to the reaction mixture sequentially. A scheme of radical graft polymerization of dimethylaminoethyl methacrylate onto polycaproamide was suggested. The properties of the copolymers were studied. The materials based on modified polycaproamide show promise as chemisorbents.     

Preparation of an Ion-Exchange Fiber by Polymer-Analogous Transformations in Polycaproamide-Polyglycidyl Methacrylate Grafted Chains

The possibility of preparing an ion-exchange fiber based on polycaproamide-polyglycidyl methacrylate graft copolymers was examined. Specific features of phosphorylation of epoxy groups in grafted polycaproamide-polyglycidyl methacrylate chains were revealed.     

Structural and chemical modification of polycaprolactam with a composite based on a polyfluorinated telomeric alcohol

The influence exerted on the supramolecular structure and properties of polycaprolactam by new composites based on 1,1,5-trihydroperfluoro-1-pentanol immobilized on montmorillonite support, introduced into the polymer melt, was studied. As found by electron microscopy and X-ray diffraction analysis, the layered structure of the fluorinated organoclay undergoes delamination in the bulk of the polymer matrix with the formation of an exfoliated nanocomposite. The modifier exerts a complex effect on the caprolactam structure, consisting in changes in the size of supramolecular formations and redistribution of the fraction of α- and γ-crystalline forms, which favors enhancement of the thermal oxidation resistance of the material.