Grafting of PP onto glass fibers. A method for enhanced the interfacial adhesion

ETCHEVERRY, MARIANA; FERREIRA, MARÍA LUJÁN; PEGORETTI, ALESSANDRO; BARBOSA, SILVIA ELENA; CAPIATI, NUMA JOSÉ

Lima, Perú

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

Universidad Católica de Perú

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. This reaction was studied for different hidroxy-á-olefin concentrations [1-2]. The morphology of cryogenicfracture surfaces of composites was analyzed by Scanning Electron Microscopy with X-ray Disperse Energy Microanalysis on line (SEM/EDX). Microcomposites were obtained by compression molding. Fibers were carefully aligned within two polypropylene films sandwiched between two stainless steel sheets. Samples were obtained by cutting strips containing one single fiber longitudinally aligned in the center.[3] Five kinds of samples were obtained by sandwiched of untreated and treated fibers with 0.5, 1, 1.5 and 2 wt% of á-olefin. This reaction was studied for different hidroxy-á-olefin concentrations [1-2]. The morphology of cryogenicfracture surfaces of composites was analyzed by Scanning Electron Microscopy with X-ray Disperse Energy Microanalysis on line (SEM/EDX). Microcomposites were obtained by compression molding. Fibers were carefully aligned within two polypropylene films sandwiched between two stainless steel sheets. Samples were obtained by cutting strips containing one single fiber longitudinally aligned in the center.[3] Five kinds of samples were obtained by sandwiched of untreated and treated fibers with 0.5, 1, 1.5 and 2 wt% of á-olefin. 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. This reaction was studied for different hidroxy-á-olefin concentrations [1-2]. The morphology of cryogenicfracture surfaces of composites was analyzed by Scanning Electron Microscopy with X-ray Disperse Energy Microanalysis on line (SEM/EDX). Microcomposites were obtained by compression molding. Fibers were carefully aligned within two polypropylene films sandwiched between two stainless steel sheets. Samples were obtained by cutting strips containing one single fiber longitudinally aligned in the center.[3] Five kinds of samples were obtained by sandwiched of untreated and treated fibers with 0.5, 1, 1.5 and 2 wt% of á-olefin.á-olefin concentrations [1-2]. The morphology of cryogenicfracture surfaces of composites was analyzed by Scanning Electron Microscopy with X-ray Disperse Energy Microanalysis on line (SEM/EDX). Microcomposites were obtained by compression molding. Fibers were carefully aligned within two polypropylene films sandwiched between two stainless steel sheets. Samples were obtained by cutting strips containing one single fiber longitudinally aligned in the center.[3] Five kinds of samples were obtained by sandwiched of untreated and treated fibers with 0.5, 1, 1.5 and 2 wt% of á-olefin.