Stearic acid as interface modifier and lubricant agent of the system: Polypropylene/calcium carbonate nanoparticles
2019; Wiley; Volume: 59; Issue: s2 Linguagem: Inglês
10.1002/pen.25053
ISSN1548-2634
AutoresYarazett Hernández-Castillo, Tomás Lozano, Ana Beatriz Morales‐Cepeda, Fabiola Navarro‐Pardo, M. E. Ángeles, Luisiana Morales‐Zamudio, J.A. Melo‐Banda, S. Sánchez‐Valdés, Guillermo Martínez‐Colunga, Francisco J. Rodríguez,
Tópico(s)biodegradable polymer synthesis and properties
ResumoThe toughness and the rheology of polypropylene (PP)‐calcium carbonate (CaCO 3 ) nanocompounds using stearic acid as an interface modifier were studied in this work. Compounding of the nanocomposites was carried out with a twin‐screw extruder. The benchmark samples (untreated) and stearic acid‐treated CaCO 3 nanoparticles were characterized by Fourier transform infrared (FTIR) spectroscopy. The nanocompounds were characterized by impact test, tensile test, scanning electron microscopy (SEM), rheological analysis, and differential scanning calorimetry (DSC). The elongation‐at‐break and impact resistance were increased in nanocompounds with interface modifier (stearic acid in hopper of the extruder). Nanocompounds with stearic acid showed the best dispersion state. Stearic acid helps to reduce complex viscosity acting as a lubricant, reducing frictional forces between nanoparticles of calcium carbonate (NCC) and PP chains. Nanocompounds with better dispersion state had crystallization temperatures very similar to the PP homopolymer. POLYM. ENG. SCI., 59:E279–E285, 2019. © 2019 Society of Plastics Engineers
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