Kinetics of graft copolymerization of acrylamide and 2-hydroxyethylmethacrylate monomer mixture onto poly(ethylene terephthalate) fibers

Abstract

Poly(ethylene terephthalate) (PET) fibers were grafted with acrylamide (AAm) and 2-hydroxyethylmethacrylate (HEMA) using benzoyl peroxide (Bz 2 O 2 ) as initiator in aqueous media. PET fibers were swelled in dichloroethane (DCE) for 2 h at 90 o C to promote the incorporation and the subsequent polymerization of AAm/HEMA onto PET fibers. Variations of graft yield with time, temperature, initiator concentration and monomer mixture ratio were investigated. The optimum initiator concentration was found to be 10 mmol/L. The maximum graft yield was obtained (prep.) 273%. The optimum temperature and polymerization time were found to be 85 o C and 120 min, respectively. The rate of grafting was found to be proportional of the 1.39 and 0.37 powers of AAm/HEMA and Bz 2 O 2 concentrations, respectively. The grafted PET fibers were characterized by FTIR spectroscopy and scanning electron microscopy (SEM). Further changes in properties of grafted PET fibers such as water absorption capacity and diameter were determined. The dyeability of the PET fibers increased with an increase in grafting with acidic and basic dyes.

Preparation and characterization of graft copolymerized Cannabis indica L. fiber-reinforced unsaturated polyester matrix-based biocomposites

“…[27][28][29][30] Different workers have studied the kinetics of graft copolymerization of vinyl monomers onto the starch and synthetic copolymers, but few attempts seem to have been made to study kinetics of graft copolymerization of vinyl monomers onto natural fibers. [31][32][33] Cannabis fiber containing about 68% cellulose is a natural fiber obtained from stem branches of Cannabis indica, an annual herb abundantly found in Himalayas. Traditionally, this fibrous material has been used by local people for making low-cost articles like ropes, bags, socks, boots, mats, etc.…”

“…27 – 30 Different workers have studied the kinetics of graft copolymerization of vinyl monomers onto the starch and synthetic copolymers, but few attempts seem to have been made to study kinetics of graft copolymerization of vinyl monomers onto natural fibers. 31 – 33…”

Amino polysaccharide quaternary ammonium salt grafted to PET‐Cuff by ultraviolet irradiation for improving the sustained antibacterial property of semi‐permanent central vein tunneled cuffed catheter

“…(1) Certain desirable properties such as hydrophilicity, dyeability with basic, and other classes of dyes, adsorption, water absorbency can be imparted to PET fiber by grafting with different monomers 20 . PET fabrics were pretreated with ultrasonic washing and dried to constant weight.…”

Effect of graft copolymerization on mechanical, thermal, and chemical properties of grewia optiva/unsaturated polyester biocomposites

“…Among various initiation systems, the chemical initiation of the grafting involving oxidizing agents such as KMnO 4 , Na 2 S 2 O 3 , Ce(IV), V(V) etc, are promising from the economic point of view [23–26]. Different workers have studied the kinetics of graft copolymerization of vinyl monomers onto the starch and synthetic copolymers but few attempts have been made to study the kinetics of graft copolymerization of vinyl monomers onto natural fibers [27–29].…”