University of Kashan Journal of Nanostructures 2251-7871 12 4 2022 10 01 Synthesis of a Novel Flame Retardant Containing Phosphorus-Nitrogen Cotton by Grafting Poly Diethyl (Acryloyloxy) Ethylthiophosphoramidate onto Cotton via Atom Transfer Radical Polymerization, and Its Polymer/Clay Nanocomposite 898 913 112853 10.22052/JNS.2022.04.012 EN Saber Ghasemi Karaj-Abad Department of Chemistry, Payame Noor University, P. O. Box: 19395-3697 Tehran- Iran Elham Eslamian Department of Chemistry, Payame Noor University, P. O. Box: 19395-3697 Tehran- Iran Mojtaba Abbasian Department of Chemical Engineering, University of Bonab, Bonab, Iran Mehdi Hosseinzadeh Marand Faculty of Technical and Engineering, University of Tabriz, Tabriz, Iran Esmail Vessally Lab. of Materials, Faculty of Engineering, Islamic Azad University, Bonab branch, Bonab, Iran Solmaz Esmaeily Shoja Bonab Lab. of Materials, Faculty of Engineering, Islamic Azad University, Bonab branch, Bonab, Iran Journal Article 2022 07 09 In this research, a novel strategy for preparation of a flame retardant cotton fabric with a covalently attached diethyl (acryloyloxy) ethylthiophosphoramidate (DEAETPN) through surface initiated ATRP was investigated. Initially, new phosphorus containing flame retardant monomer (nitrogen and sulfur (DEAETPN) was prepared by reacting (2-hydroxy-ethyl)-thiophosphoramidic acid O, O’-diethyl ester with α-chlorophenyl acetyl chloride as an initiator. The initiator for ATRP using our novel method was covalently linked onto the cotton surface fibers. For this purpose, the surface of cotton fibers based-cellulose was modified with 3-aminopropyl triethoxysilane - a silane coupling agent. This functionalized cotton was then reacted with α-chlorophenyl acetyl chloride to prepare the Cotton-APTES-Cl macroinitiator. The metal-catalyzed radical polymerization of DEAETPN with macroinitiator was carried out in the presence of CuBr / 2, 2/-bipyridine (BPy) catalyst system in THF solvent at 70˚C to obtain poly (DEAETPN) segments grafted chlorinated cotton. Finally, the resulting nanocomposite obtained from Cotton-g-P (DEAETPN) graft polymer with montmorillonite modified in Carbon tetrachloride (CCl4) was prepared by a solution intercalation method. The chemical structure of all prepared compounds was confirmed by different techniques such as spectroscopy: FT-IR, 1HNMR, TEM, and SEM. The compound thermal behavior was also evaluated by DSC and TGA. https://jns.kashanu.ac.ir/article_112853_281375c4f044c51be0bf1a19eea5336c.pdf