Solid-state radical grafting reaction of glycidyl methacrylate and poly(4-methyl-1-pentene) in supercritical carbon dioxide: Surface morphology and adhesion

• Published in: Journal of colloid and interface science Vol. 361; no. 1; pp. 331 - 337
• Main Authors: Kunita, Marcos H., Guilherme, Marcos R., Filho, Lucio C., Muniz, Edvani C., Franceschi, Elton, Dariva, Claudio, Rubira, Adley F.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Inc 01-09-2011; Elsevier
• Subjects: Adhesion; Benzoyl peroxide; Carbon dioxide; Chemistry; Exact sciences and technology; Fourier transform infrared spectroscopy; General and physical chemistry; Graft polymers; Grafting; Impregnation; Morphology; Polymeric films; polymers; Radicals; Solid-state radical polymerization; Supercritical carbon dioxide impregnation; Surface morphology; temperature; Supercritical carbon dioxide impregnation; Adhesion; Surface morphology; Solid-state radical polymerization; Graft polymers; Film; Binary system; Carbon dioxide; Polymerization; Polymer; Supercritical state; Grafting; Design; Infrared spectrometry; Solid state; Impregnation; Pentene; Technology; Morphology; Benzoyl peroxide
• ISSN: 0021-9797; 1095-7103
• DOI: 10.1016/j.jcis.2011.05.024

Solid-state radical grafting of glycidyl methacrylate onto poly(4-methyl-1-pentene) was performed using supercritical CO2. The grafting and morphology were controlled by time, temperature, and pressure of impregnation. [Display omitted]
► Solid-state radical grafting of glycidyl methacrylate (GMA) onto poly(4-methyl-1-pentene) (PMP) was performed using supercritical carbon dioxide (scCO2) impregnation technology. ► The grafting degree of the samples may be controlled by time, temperature, and pressure of impregnation. ► Better graft response was obtained for pressure of 130bar, temperature of 70°C and time of 7h. ► Adhesion characteristics of polymer films are dependent on grafting degree of GMA.
Solid-state radical grafting of glycidyl methacrylate (GMA) onto poly(4-methyl-1-pentene) (PMP) was performed using supercritical carbon dioxide (scCO2) impregnation technology. The polymer films were firstly impregnated in the scCO2 phase with the GMA using benzoyl peroxide as thermal initiator. The grafting degree and surface morphology of the samples may be controlled by the following factors: time, temperature, and pressure of impregnation. A 23 factorial design to evaluate the main and interaction effects of such factors on the grafting of the PMP by GMA (grafting response) was elaborated from FTIR data. The superior and inferior limits of the levels were defined on basis of a P-x-y diagram for binary system CO2+GMA that provided the location of the transition curves of such a system. Better grafting response was obtained for pressure of 130bar, temperature of 70°C and time of 7h. The PMP-g-GMA films exhibited a thermal profile similar to that of the unmodified polymer. Adhesion characteristics of polymer films are dependent on grafting degree of GMA.