Surface properties of poly(acrylonitrile) (PAN) precipitation polymerized in supercritical CO2 and the influence of the molecular weight

Fabrication and characterization of a persimmon leaves (PL)/poly(acrylonitrile) (PAN) blend bio‐fiber

“…Commercial PAN with known molecular weight, M n , of about 18 kDa was obtained from Shanghai Jinshan Chemical Co. and used without further treatment. Previously, this PAN powder has been also used and described 10…”

“…The condition of wet spinning method is capable of protecting the medical substances for biomaterials as previous adopted, and poly(acrylonitrile) (PAN) can be dissolved in solvent to fit such conditions 10. The aims of this work were therefore proposed initially to prepare a PAN/PL blend fiber; then to characterize the properties of the obtained fiber, meanwhile comparing it with a referenced PAN fiber that was prepared with the same method and condition as that of this case.…”

Enhancing the mechanical and thermal properties of polyacrylonitrile through blending with tea polyphenol

“…The IR spectra of the PAN/TP blends with different mixing ratios are shown in Figure , where the pure TP also appeared as a reference. Because the IR spectrum of PAN has been done elsewhere, we knew that those distinct absorption bands at 2930 cm −1 (ν CH in CH 2 ), 2244 cm −1 ( in CN), 1662 cm −1 (δ CH in CH 2 ), 1447 cm −1 (δ CH in CH), 1388 cm −1 (δ OH vibration), 1248 cm −1 (ν COC stretching), and 1092 cm −1 (ν COC stretching) appeared in the blends corresponded to the PAN structure . With the IR spectrum of TP as taken as a reference (Figure ), it is also known that the typical TP peaks, such as those located at 1697 cm −1 (ν CO stretching), 1622 cm −1 (ν CC vibration on the ring), 1452 cm −1 (δ CH bending), 1348 cm −1 (δ OH bending), 1243 cm −1 (ν COC stretching), 1144 cm −1 (ν COC stretching), and 1034 cm −1 (ν COC stretching overlapped or uniquely appeared in those blends.…”

“…A commercial PAN obtained from Shanghai Petrochemical Co. with known molecular weight (number‐average molecular weight = 18,000) was used as received. This PAN was used and studied previously …”

“…Polyacrylonitrile (PAN) is a copolymer made from a mixture of monomers, and acrylonitrile (AN) is the main component. As an important polymeric material, PAN is broadly applied as the main precursor of carbonaceous materials, including carbon fibers, porous/activated carbon materials, and nanofibers, because of its high carbon yield, for example, up to 56% . PAN is also broadly applied to the production of textile fibers and ultrafiltration membranes because of its good flexibility and stability …”