pps proceeding - Abstract Preview
pps proceeding
Symposium: S14 - Special: Recycling and Sustainable Polymers
Poster Presentation
 
 

Carbon fiber recovered from epoxy composite scrap as reinforcement in polypropylene

Mesquita Lobato Lauro Augusto (1), Babetto Ferreira Ana Clélia (1), de Souza Eliseu William (1), Bonse Baltus Cornelius (2)*

(1) Faculdade SENAI de Tecnologia Ambiental - São Paulo - Brazil, (2) Centro Universitário FEI - São Paulo - Brazil

Carbon fibers recovered from scrap from the cutting process of epoxy composites were incorporated in polypropylene. First, the scrap was ground and passed through different sieves for classification. Fibers of 150µm and 300µm average length were incorporated in PP by means of a twin-screw extruder at 5 wt% of the ground composite. Polypropylene grafted maleic anhydride was used as a compatibilizer at 10 wt% in relation to the carbon fiber. Injection-molded test specimens were subjected to tensile, impact, hardness and scanning electron microscopy tests. The results obtained showed that even at low carbon fiber content PP tensile strength increased about 20%. Tensile modulus increased only slightly, whereas impact strength and hardness were practically not affected. Strain at break decreased approximately 70%, likely due to the low degree of interfacial bonding between fiber and matrix, as evidenced by scanning electron microscopy analysis. Fiber length showed to have little effect on the investigated properties.