Graft copolymerization of dimethylacrylamide onto AFLAS

Abstract

SYNOPSISThe method of irradiation grafting of DMAA onto AFLAS (alternating copolymer of tetrafluoroethylene and propylene) films was studied. The effect of the solvent on the grafting yield was determined. As a result, it might be important to evaluate the blood compatibility of the films already grafted by using an in uitro test. Benzene tests seem to be the most adequate for copolymerization. Grafting yield was better in the monomer 40-60% concentration range. The degree of grafting increases proportionally to dose rate in gamma ray radiation. The graft copolymerization is terminated via unimolecular mechanism. 0 1995

Structure development and melt viscoelastic properties of PE/organoclay nanocomposite blown films

“…Thus, modified polymers having polar groups, called as compatibilizers or interfacial agents must be introduced in nanocomposite formulations to enhance the extent of intercalation as well as dispersion of organoclay in polyolefin matrix. In most research works carried out on polypropylene/organoclay nanocomposites prepared by the melt compounding, the maleic anhydride‐grafted polypropylene was used as compatibilizer which led to form an intercalated and/or exfoliated structure 9–12. However, few studies focused on polyethylene/organoclay nanocomposite samples have shown less degree of success in increasing interlayer d ‐spacing and structure development compared to the polypropylene‐based nanocomposites 13, 14…”