Radiation‐induced graft copolymerization of α‐methyl styrene and butyl acrylate mixture into polyetheretherketone films

Abstract

Radiation-induced graft copolymerization of a-methyl styrene (AMS), butyl acrylate (BA) monomers, and their mixture was investigated on poly(etheretherketone) films. The graft polymerization was carried out using ethyl methyl ketone as the medium for the copolymerization and the maximum degree of grafting of 27% was achieved. It was observed that the grafting is significantly influenced by the reaction conditions, such as reaction time, preirrradiation dose, monomer concentration, monomer ratio, and the reaction temperature. The degree of grafting increases as the monomer concentration increases up to 30%, beyond which a decrease in the grafting was observed. The degree of grafting showed a maximum at 40% BA content in the monomer mixture. The temperature dependence of the grafting process shows decreasing grafting with the increase in the reaction temperature. The presence of AMS and BA grafts in the film was confirmed by FTIR spectra. The relative change in the PBA/PAMS fraction with respect to the reaction temperature has been found in this study.

Effect of Radiation-Induced Cross-Linking on Thermal Aging Properties of Ethylene-Tetrafluoroethylene for Aircraft Cable Materials

“…Although fluoropolymers have been extensively employed as insulation materials in spaceships and aircrafts, fluoropolymer, which is used for aerospace applications, is frequently decomposed on account of its rather low radiation resistance performance derived from fluoride precipitation after cosmic ray radiation [ 3 , 4 ]. Hence, there has been a substantial drop-off in mechanical properties, chemical resistance, electrical properties, thermal stability, surface properties, and other characteristics of perfluoropolymers where the body is exposed to rays [ 5 , 6 ] and the extent of degradation depends upon the radiation dose, dose rate, and energy of the incident radiation [ 7 , 8 , 9 , 10 , 11 , 12 , 13 ].…”

Preparation of proton exchange membranes by radiation-induced grafting of alpha methyl styrene–butyl acrylate mixture onto polyetheretherketone (PEEK) films

“…Graft copolymerization of AMS-BA (60:40) mixture on PEEK films was carried out by preirradiation grafting method, as reported in previous paper [22]. Grafting was carried out using 30 % monomer concentration at a temperature of 50°C.…”

“…BA is expected to enhance the polymerization of AMS along the propagating chains. We have reported the radiation grafting of AMS and butyl acrylate (BA) onto PEEK to develop copolymer films with varying graft levels [22]. The influence of the grafted component on the physical properties of the copolymer film was investigated [23].…”

Structural characterization of alpha methyl styrene‐butyl acrylate‐grafted polyetheretherketone films

“…28 Grafting was carried out at the monomer concentration of 30% at a temperature of 50 C. The irradiated sample ($400 mg) was placed in a reaction tube containing aqueous monomer solution. 28 Grafting was carried out at the monomer concentration of 30% at a temperature of 50 C. The irradiated sample ($400 mg) was placed in a reaction tube containing aqueous monomer solution.…”

“…18 Poly(etheretherketone) (PEEK) films are known for their excellent thermal stability, mechanical strength, and high chemical resistance. 28 The present investigation aims at studying the characteristics and structural changes in the PEEK films induced by the AMS-BA grafting. [19][20][21] PEEK films have been modified by thermal grafting of divinylbenzene (DVB) followed by radiation grafting of ethyl styrene sulfonate (ETSS), to develop a polymer electrolyte membrane (PEM) for use in direct methanol fuel cells (DMFCs).…”