Thermal and mechanical properties of nanocomposites based on polyethylene and Mg/Al hydrotalcite
- PDF / 732,011 Bytes
- 5 Pages / 612 x 792 pts (letter) Page_size
- 14 Downloads / 189 Views
Thermal and mechanical properties of nanocomposites based on polyethylene and Mg/Al hydrotalcite L.Y. Jaramillo1,3, J.C. Posada-Correa2, E. Pabón-Gelves3, E. Ramos-Ramírez4, N.L. GutiérrezOrtega5 1
Advanced Materials and Energy Research Group Instituto Tecnológico Metropolitano, Campus Fraternidad Calle 54A No 1-30 Medellín, Colombia. 2 Quality, Metrology and Manufacturing Research Group Instituto Tecnológico Metropolitano, Campus Robledo Calle 73 No 76ª-354 Medellín, Colombia. 3 Advanced Materials Science Research Group Facultad de Ciencias, Universidad Nacional de Colombia Sede Medellín, Calle 59A No 63-20, Medellín, Colombia. 4 Chemistry Department, Exact and Natural Sciences Division Universidad de Guanajuato Noria Alta s/n, Col. Noria Alta, C.P. 36050, Guanajuato, Gto., México. 5 Civil Engineering Department Universidad de Guanajuato Juárez No. 77, Col. Centro, C.P. 36000, Guanajuato, Gto., México ABSTRACT In this work there was studied the effect of nano-Mg/Al hydrotalcite (NHT) as filler on maleic anhydride grafted linear low density polyethylene (LLDPE-g-MA). NHT was synthesized by the coprecipitation method with a ratio of Mg/Al=6 and nanocomposites were prepared using 1, 3 and 5 %wt of filler via melt-blending. Morphological and structural analysis of NHT were performed and for nanocomposites, tensile tests and thermal properties were measured. Results showed that filler was well dispersed in the LLDPE matrix, mechanical properties were enhanced in most of the cases and thermal stability improvements were achieved in the nanocomposites. INTRODUCTION Layered double hydroxides whit the hydrotalcite type have deserved an increasing interest because of their applications in different fields. Nanocomposites are commonly based on natural layered clay minerals such as montmorillonite and recently different types of nanofillers have been exploited to prepare nanostructured materials, among these, hydrotalcite-like compounds [1-2]. The majority of research works on polymer nanocomposites based on layeres materials have been focused on the materials of natural origin such a natural clays which are mostly cationic. Hydrotalcite-like materials have some advantages in comparison to various fillers, like homogeneous compositon, control of crystallinity and particle size, wider possibility of functionalization [3-4].
EXPERIMENTAL DETAILS Materials and nanocomposites preparation NHT was synthesized by the coprecipitation method with a ratio of Mg/Al=6 and maleic anhydride-modified linear low-density polyethylene (LLDPE-g-MA) was used as matrix. LLDPE matrix is a commercial resin used in extrusion and coextrusion processes, with a melt flow rate of 3 g /10min and a density of 0.92 g/cm3. Nanocomposites were prepared using 1, 3 and 5 %wt of NHT via melt-blending using a Haake Rheodrive 7 Polylab OS internal mixer; a temperature range of 170 - 200 oC and rotational speed of 60 rpm were used. Samples were named as HT-1, HT-3 and HT-5 according to the filler percentage. . Characterization of filler and nanocomposites Morpho
Data Loading...
