Prospects for Using Polyacrylonitrile for Preparing Carbonized Polymeric Composites

Abstract

The thermochemical cyclization of different polyacrylonitrile samples prepared by radical and anionic polymerization was studied by thermal analysis, spectroscopy, and AM1 semiempirical calculations. The possibility of using polyacrylonitrile as a cocarbonizate for preparing mixed carbon composites with nitrogen-containing polysaccharides was examined.

Poly(acrylonitrile)–molybdenum disulfide polymer electrolyte nanocomposite

“…3. It is known that in the solid-free polymer the PAN chains, due to intramolecular nitrile-dipole repulsion, bear towards a 'helical' type structure [35][36][37][38] , or, after a more refined picture, 39 to a randomlykinked but rod-like structure. The X-ray diffraction pattern of standard PAN fibers with two typical reflections at 2h = 16.8 and 19.5u correspond indeed essentially to the hexagonal packing of these chains.…”

Cocarbinization of Blends of Polyacrylonitrile with Chitin and Chitosan

“…One of important lines in this field is the use of polymers commercially produced on a large scale, such as polyacrylonitrile (PAN) and cellulose derivatives, for which the raw materials are readily available. In [1], we substantiated theoretically and experimentally the thermochemical reactions of PAN with chitin (CT) and chitosan (CTS), nitrogen-containing cellulose derivatives. As shown in [2,3], cellulose derivatives containing nitrile groups and graft copolymers of PAN with cellulose ethers or esters are promising as raw materials for preparing cocarbonizates with a high coke number (CN).…”

“…Based on the previous data [1], we chose for the reaction the temperature range 200 3350oC. At these temperatures, the thermal degradation and cross-linking of PAN and polysaccharides are the most intense.…”

“…3. (1, 2) PAN powder, (3, 4)film of PAN + CT blend, and (5, 6) CT powder (1,3,5). In air and(2,4,6) in a nitrogen flow.…”