Change in the Properties of Linear Low-Density Polyethylene (LLDPE)/Montmorillonite Clay Nanocomposites after a Fuel-Aging Process

Oxidized paraffin wax was used as a compatibilizer in composites of linear low-density polyethylene and layered nano silicate clays. X-ray diffraction analyses were carried out to investigate the crystalline morphology of five types of clays, oxidized wax, and their composites with LLDPE. The composites exhibited different X-ray diffraction and dynamic mechanical behaviour in the presence of different clays. Generally, the composites retained the partially crystalline behaviour of LLDPE, and no exfoliation was observed. Increased amount of wax did not change the morphology in most cases. The incorporation of clay resulted in an observable increase in the storage modulus of LLDPE. These values also increased with the addition of oxidized wax for most of the composites. The loss modulus increased with the amount of clay, irrespective of its nature. In most cases these values also increased with the incorporation of wax. The composites with 10% clay and 10% oxidized wax showed the highest storage and loss moduli, irrespective of the nature of the clay. The tan δ values did not change considerably with the addition of clay or wax.

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New compatibilizer for linear low-density polyethylene (LLDPE)/clay nanocomposites

Journal of Applied Polymer Science ◽

10.1002/app.30544 ◽

2009 ◽

Vol 114 (1) ◽

pp. 25-31 ◽

Cited By ~ 12

Author(s):

Dong-Woo Jin ◽

Sung-Mok Seol ◽

Gue-Hyun Kim

Keyword(s):

Low Density Polyethylene ◽

Clay Nanocomposites ◽

Low Density ◽

Linear Low Density Polyethylene

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Photochemical stabilization of linear low-density polyethylene/clay nanocomposites: Towards durable nanocomposites

Polymer Degradation and Stability ◽

10.1016/j.polymdegradstab.2008.07.031 ◽

2008 ◽

Vol 93 (10) ◽

pp. 1776-1780 ◽

Cited By ~ 56

Author(s):

Sandrine Morlat-Therias ◽

Elisabeth Fanton ◽

Jean-Luc Gardette ◽

Nadka Tzankova Dintcheva ◽

Francesco P. La Mantia ◽

...

Keyword(s):

Low Density Polyethylene ◽

Clay Nanocomposites ◽

Low Density ◽

Linear Low Density Polyethylene

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Identification of the LLDPE Constitutive Material Model for Energy Absorption in Impact Applications

Polymers ◽

10.3390/polym13101537 ◽

2021 ◽

Vol 13 (10) ◽

pp. 1537

Author(s):

Luděk Hynčík ◽

Petra Kochová ◽

Jan Špička ◽

Tomasz Bońkowski ◽

Robert Cimrman ◽

...

Keyword(s):

Strain Rate ◽

Material Model ◽

Low Density Polyethylene ◽

Low Density ◽

Linear Low Density Polyethylene ◽

Stress Strain ◽

Rate Dependent ◽

Constitutive Material Model ◽

Principal Directions ◽

Constitutive Material

Current industrial trends bring new challenges in energy absorbing systems. Polymer materials as the traditional packaging materials seem to be promising due to their low weight, structure, and production price. Based on the review, the linear low-density polyethylene (LLDPE) material was identified as the most promising material for absorbing impact energy. The current paper addresses the identification of the material parameters and the development of a constitutive material model to be used in future designs by virtual prototyping. The paper deals with the experimental measurement of the stress-strain relations of linear low-density polyethylene under static and dynamic loading. The quasi-static measurement was realized in two perpendicular principal directions and was supplemented by a test measurement in the 45° direction, i.e., exactly between the principal directions. The quasi-static stress-strain curves were analyzed as an initial step for dynamic strain rate-dependent material behavior. The dynamic response was tested in a drop tower using a spherical impactor hitting a flat material multi-layered specimen at two different energy levels. The strain rate-dependent material model was identified by optimizing the static material response obtained in the dynamic experiments. The material model was validated by the virtual reconstruction of the experiments and by comparing the numerical results to the experimental ones.

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