Molecular interactions arising in polyethylene-bentonite nanocomposites |
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| Authors: | A E Bonilla-Blancas I C Romero-Ibarra J Vazquez-Arenas A Sanchez-Solis O Manero J Alvarez-Ramirez |
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| Affiliation: | 1. Centro de Tecnología Avanzada CIATEQ A.C. -Centro de Tecnología Avanzada. Circuito de la Industria Poniente No. 11, lt. 11, Parque Industrial ex Hacienda Dona Rosa, Lerma, Estado de México, Mexico;2. Unidad Profesional Interdisciplinaria en Ingeniería y Tecnologías Avanzadas-Instituto Politécnico Nacional, Av. IPN No. 2580, Gustavo A. Madero, C.P, 07340, Ciudad de México, Mexico;3. Centro Mexicano para la Producción más Limpia, Instituto Politécnico Nacional, Avenida Acueducto s/n, Col. La Laguna Ticomán, 07340, Ciudad de México, Mexico;4. Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Ciudad Universitaria, A.P. 70-360, Ciudad de México, 04510, Mexico;5. Departamento de Ingeniería de Procesos e Hidráulica, Universidad Autónoma Metropolitana-Iztapalapa, Apartado Postal 55-534, Ciudad de México, 09340, Mexico |
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| Abstract: | High density polyethylene (HDPE), linear low density polyethylene (LLDPE) and low density polyethylene (LDPE) are blended, and compared against a similar mixture but functionalized LDPE with maleic anhydride (MAh), HDPE-LLDPE-LDPE-g-MAh. In order to obtain nanocomposites from these polymer blends, a modified bentonite was added by incorporating l -lysine into the bentonite galleries by melt extrusion. The resulting nanocomposites presented improved mechanical properties linked to strong polymer-bentonite interactions and exfoliated structures as verified by transmission electron microscopy and rheometry. A detailed analysis of the feasible polymer-bentonite interactions was conducted, of particular concern between the polar MAh groups and the intercalated l -lysine. To gain further insights into the type of molecular interactions (i.e. polymer-bentonite), a model nanocomposite was synthesized in solution to carry out further assessments through NMR, infrared spectroscopy and rheology analysis. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 46920. |
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| Keywords: | bentonite functionalized ternary blends molecular interactions nanocomposite polyethylene |
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