Study of radiation‐induced graft polymerization of vinyl monomers to cellulose by infrared spectroscopy. I. Cellulose–polyacrylonitrile copolymers

Abstract

Infrared spectral analysis has been applied for the study of cotton–polyacrylonitrile copolymers prepared by using the preirradiation method. The degree of grafting was determined from the absorption at 2249 cm.−1, which is characteristic of the polyacrylonitrile spectrum, with an accuracy of ± 1.5%.

Graft Polymerization: Grafting Poly(styrene) from Cellulose via Reversible Addition−Fragmentation Chain Transfer (RAFT) Polymerization

“…The medium to strong absorption band at 695 cm -1 , which represents the deformation vibration of the -CH-group of the monosubstituted benzene ring in poly(styrene), illustrates the successful grafting between cellulose and poly(styrene), as there is no intense characteristic band appearing in that spectral region for the cellulose-CTA sample. The absorption band at about 700 cm -1 has also been used as the main proof of grafting and quantitative determination of the poly-(styrene) in cotton cellulose-poly(styrene) copolymers by Imrisova et al 47 Cleaving of the Poly(styrene) Chains from the Cellulose Substrate. To quantify the molecular weight and molecular weight distribution of the poly(styrene) chains that become attached to the cellulose substrate, each sample was hydrolyzed by a solution of 37% HCl.…”

Combining MR elastography and diffusion tensor imaging for the assessment of anisotropic mechanical properties: A phantom study

“…Although jute fiber possesses high‐dimensional stability, certain unfavorable textile properties like high stiffness, very low elasticity, and susceptibility towards sunlight have tremendously limited for their use. Therefore, to minimize the undesirability and to enhance their effectiveness for intensified textile uses, graft copolymerization of vinyl monomers onto jute fibers has been attempted during the recent years, using chemical,1–5 photochemical,6 and radiation‐induced7–10 methods of initiation where the grafted fiber shows improved tenacity, dyeability, and tensile properties. Furthermore, among the methods of initiation, chemical method of initiation of grafting involving oxidizing agents like KMnO 4 , Na 2 S 2 O 3 , K 2 S 2 O 8 , and KHSO 5 are promising from the economic point of view and are quite selective in nature.…”

Graft copolymerization of acrylate monomers onto sulfonated jute–cotton blended fabric

“…Although jute fiber possesses high-dimensional stability, certain unfavorable textile properties like high stiffness, very low elasticity, and susceptibility towards sunlight have tremendously limited for their use. Therefore, to minimize the undesirability and to enhance their effectiveness for intensified textile uses, graft copolymerization of vinyl monomers onto jute fibers has been attempted during the recent years, using chemical, [1][2][3][4][5] photochemical, 6 and radiation-induced [7][8][9][10] methods of initiation where the grafted fiber shows improved tenacity, dyeability, and tensile properties. Furthermore, among the methods of initiation, chemical method of initiation of grafting involving oxidizing agents like KMnO 4 ) has a separate identity of its own.…”