Grafting of PP onto glass fibers. a method for enhanced the interfacial adhesio

MARIANA ETCHEVERRY; MARíA LUJáN FERREIRA; ALESSANDRO PEGORETTI; SILVIA E BARBOSA; NUMA J.CAPIATI

Lima

Simposio; XI Simposio Latinoamericano y IX Congreso Iberoamericano de Polímeros; 2008

In this work, a new approach to increase polypropylene-fiber adhesion based on propylene polymerization onto fibers is proposed. In this sense, chemical anchoring of the matrix on glass fibers was performed by direct metallocenic propylene polymerization. The experimental route involves an initial contact with methilaluminoxane (MAO) and hidroxy-á-olefin to generate the anchorage points on fiber surface following of propylene polymerization catalyzed by EtInd2ZrCl2 (metallocene)/MAO. Then, the “polypropylene” chains grow from glass fibers. that the interface strength was modified and the PP-glass linkage resists more than the PP-PP entanglements. PP molecules “chemically bonded to glass” resist more than PP entanglements, and then the fracture occurs in PP around the fibers, not at the interface. that the interface strength was modified and the PP-glass linkage resists more than the PP-PP entanglements. PP molecules “chemically bonded to glass” resist more than PP entanglements, and then the fracture occurs in PP around the fibers, not at the interface.á-olefin to generate the anchorage points on fiber surface following of propylene polymerization catalyzed by EtInd2ZrCl2 (metallocene)/MAO. Then, the “polypropylene” chains grow from glass fibers. that the interface strength was modified and the PP-glass linkage resists more than the PP-PP entanglements. PP molecules “chemically bonded to glass” resist more than PP entanglements, and then the fracture occurs in PP around the fibers, not at the interface. that the interface strength was modified and the PP-glass linkage resists more than the PP-PP entanglements. PP molecules “chemically bonded to glass” resist more than PP entanglements, and then the fracture occurs in PP around the fibers, not at the interface.2ZrCl2 (metallocene)/MAO. Then, the “polypropylene” chains grow from glass fibers. that the interface strength was modified and the PP-glass linkage resists more than the PP-PP entanglements. PP molecules “chemically bonded to glass” resist more than PP entanglements, and then the fracture occurs in PP around the fibers, not at the interface. that the interface strength was modified and the PP-glass linkage resists more than the PP-PP entanglements. PP molecules “chemically bonded to glass” resist more than PP entanglements, and then the fracture occurs in PP around the fibers, not at the interface.