Potassium persulphate‐cupric ion induced grafting of acrylonitrile to nylon 6 fibres

Abstract

Polyamide 6-acrylonitrile graft copolymers were prepared without formatiorr of homopolymer by using an initiation system consisting of potassium persulphate, cuprie ion and a surface active substance. The graft yield was determined in dependence on the concentration of cuprie ion, persulphate and acrylonitrile as well as time and temperature of polymerization. A mechanism of the grafting reaction is sugcested. Die n i i t Kaliumpersulfat und Cupfer( II)-Zonen initiierte Pfropfung von Rcrylnrtril anf Polyarnid-6-FasernI'olyamid-6-Aerylnitril-Pfropfcopolymere wurden unter Vermeiduiig der Rildung von Homopolymeren durclr Verveildung eines Initiatorsystems aus Kaliumpersulfat, Cupfer(I1)-Ionen und ciner oberflachenaktiven Substaiiz synt Iietisiert. Die Pfropfausheute wurde in Abhangigkeit von der Konzentration der Cupfer(I1)-Ionen, des I'ersulfats und des Acrylnitrils sowie von der Polymerisationszeit und der Polymerisationstemperatur bestimmt. Ein moglielier Mechanismus der Pfropfungsreaktioii M ird vorgesehlagen. 17pueueRa aicppunonumpuna R eonotcxa.u noaua.uuda-G, unuyuupye.uaa nepcynb&amo.u Ranus u uoxa-uu Cu(1Z)nPHBIITbIe COIIOJIAMepbI n o n~~a~~~a -6 C aHpIIJIOHATpMJIOM ~M J I I I CHHTeTII3IIpOBaHbI 6e3 06pa30BaHHR rOMOIIOJIH-MepOB C HCnOJIb30BaHAeM CHCTeMbI IIHHqHaTOpOB H a OCHOBe IIepCyJIb@lTa KaJIIIR, IIOHOB c U ( 1 I) II nOBepXHOCTH0-aKTIlBHOr0 BeII(ecTBa. OIIpeAenRJIacb 3aBIICHMOCTb BbIXOAa IIPABHTOrO COIIOJIIIMepa OT KOHqeHTPaqAH BOHOB c U ( 11) , nepcyn@aTa Kanm II aKpmoHmTpma, a TaKxe OT speMeHx A TeMnepaTypbI n o n~~e p~3 a q 1 1~. IIpennoirteH B 0 3 -M O x H b I a MeXaHII3M PeaKqAH IIpIIBBBKII.

In Textiles

“…One distinct advantage to using the Cu 2+ ion is the control of homopolymer formation, and this effect has also been observed when grafting acrylonitrile (AN) onto nylon [95] . Similarly, modifi ed nylon6 fi ber containing grafted polydiallyldimethyl ammonium chloride has been graft polymerized using GMA in the presence of K 2 S 2 O 8 − Cu 2+ as a redox initiating system [96] .…”

Chemical grafting of 2‐ethyl methacrylate phosphoric acid onto nylon 6 fabric

“…Nylon 6 can be grafted with various vinyl monomers with the view to increase surface water absorption, dyeability, solvent and chemical resistance, electrical conductivity light or heat resistance, and adhesion to rubber. [1][2][3][4][5][6][7][8][9][10][11][12] Grafting copolymers of acrylamide to polyamide 6 is known to increase the sorption and the antistatic characteristics of nylon, the adhesion, and the improvement of other important properties. [12][13][14][15] Thus, the graft copolymerization of vinyl monomers onto nylon 6 fabric can be affected by chemical initiation that produces free radicals followed by formation of covalent bonds between the fabric and the grafted monomer.…”

“…Addition of copper sulfate to the grafting liquor has been reported to minimize or eliminate the formation of homopolymer. 9 The aim of the present study is to improve the physical properties of nylon such as the moisture regain and to increase the affinity of nylon 6 fabric to basic dyes, by creating new active acidic sites onto the backbone chains using the chemical grafting technique of aqueous anionic monomer 2-ethylmethacrylate phosphoric acid (EMPA) as vinyl monomer and potassium persulfate copper sulfate redox system as a graft initiator for the reaction.…”

Chemical grafting of 2-ethyl methacrylate phosphoric acid onto nylon 6 fabric

“…Nylon 6 can be grafted with various vinyl monomers with the view to increase surface water absorption, dyeability, solvent and chemical resistance, electrical conductivity light or heat resistance, and adhesion to rubber 1–12…”

“…Shalaby et al25, 27 used the same previous technique for grafting acrylic acid onto nylon 6 fibers and explained the grafting method on the basis of complexation of persulfate with polyamide in the presence of a surface active agent. Addition of copper sulfate to the grafting liquor has been reported to minimize or eliminate the formation of homopolymer 9…”