Postirradiation polymerization of vinyl monomers on poly(ethylene terephthalate)

Abstract

SynopsisA postirradiation process was evaluated in polymerizing vinyl monomers on poly(ethy1ene terephthalate) (PET) film, fiber, and fabric. The use of DMF, pyridine, and DMSO as swelling agents to facilitate monomer incorporation and effective polymerization were also investigated.The solvents were effective in promoting the incorporation of acrylic acid (AA) in PET film and that of n-vinyl-2-pyrrolidinone (VP) in Dacron 54. AA, a good swelling agent for PET, produced equivalent polymerization yield and moisture regain results with or without any solvent on Dacron 54 and 64. Polymerization yields on films increased with increasing total doses, but those on yarns and fabrics were independent of total dose. The different results obtained on film versus yarn and fabric from solvent treatment and total dose is thought to be due to the different surface-volume ratio of these substrates. The moisture properties of the substrates were dependent mainly upon the monomer type. Among the monomers studied, VP gave highest moisture regain values, followed by AA. The tensile properties of the modified Dacron 54 were not affected. However the breaking elongation of the modified Dacron 64 was slightly lowered by postirradiation polymerization without solvent treatment and was increased when solvent treatment was included.

Preparation of Amidoxime Adsorbent by Radiation Induced Grafting of Acrylonitrile on Polyethylene Film and Its Application in Cr(VI) Removal

“…Graft polymerisation allows incorporation of various functions possessed by the grafted monomer to the parent polymer while maintaining the mechanical properties of the parent polymer. 36,37 Among the different methods for initiating graft copolymerisation like ionising radiation, ultraviolet light, plasma treatment, decomposition of chemical initiators, oxidation of polymers, etc., radiation-induced grafting technique is advantageous because of its extensive penetration into the polymer matrix and its rapid and uniform formation of radicals. 38 Polyethylene (PE) has been selected as the base polymer to prepare the adsorbent for its excellent mechanical and thermal property and low cost.…”

Graft copolymerization of an itaconic acid/acrylamide monomer mixture onto poly(ethylene terephthalate) fibers with benzoyl peroxide

“…One of the ways employed to improve these inferior properties of PET fibers or give them new properties is graft copolymerization. Monomers such as acrylamide (AAm),4, 5 acrylic acid,6, 7 methyl methacrylate,8, 9 and N ‐vinyl‐2‐pyrrolidone10 with suitable functional groups have been successfully grafted onto PET fibers. There are also numerous studies on the grafting of multiple monomers onto PET fibers 11–14…”

Modification of polystyrene properties through grafting with N‐vinylcarboxamido‐2‐methylpropane sulfonic acid monomer

“…Hydrophilic monomer grafting has been investigated by several authers 9. 10 For instance, grafting of N ‐(vinyl pyrrolidone), acrylic acid and acrylamide onto polyethylene terephthalate (PET) have been reported 11–13. Poly( N ‐vinylcarboxomido‐2‐methylpropane sulfonic acid) is well known as a hydrophilic polymer, and was successfully used to prepare highly absorbant polymeric gels 14–16.…”