Molecular interactions arising in polyethylene‐bentonite nanocomposites

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...

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Bibliographic Details
Published in:Journal of applied polymer science 2019-01, Vol.136 (2), p.n/a
Main Authors: Bonilla‐Blancas, A. E., Romero‐Ibarra, I. C., Vazquez‐Arenas, J., Sanchez‐Solis, A., Manero, O., Alvarez‐Ramirez, J.
Format: Article
Language:English
Subjects:
Anhydrides
Bentonite
Chemical synthesis
Extrusion
Feasibility studies
functionalized ternary blends
High density polyethylenes
Infrared analysis
Low density polyethylenes
Lysine
Maleic anhydride
Materials science
Mechanical properties
Molecular interactions
nanocomposite
Nanocomposites
NMR
Nuclear magnetic resonance
Polyethylene
Polymer blends
Polymers
Rheological properties
Rheology
Rheometry
Transmission electron microscopy
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Summary: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.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.46920