Composites based on HDPE filled with BaTiO3 submicrometric particles. Morphology, structure and dielectric properties

Composites based on HDPE filled with BaTiO3 submicrometric particles. Morphology, structure and dielectric properties

Composites of high density polyethylene, HDPE, filled with submicrometric particles of BaTiO3, BT, have been prepared. Uniform dispersion of the particles was achieved by high energy ball milling and subsequent hot pressing. Using SEM, FTIR, TGA-DTA and stress-strain tests, studies of the structural...

Full description

Saved in:
Bibliographic Details
Published in:Polymer testing Vol. 32; no. 8; pp. 1342 - 1349
Main Authors: Gonzalez-Benito, J., Martinez-Tarifa, J., Sepúlveda-García, M.E., Portillo, R.A., Gonzalez-Gaitano, G.
Format: Journal Article
Language:English
Published: Kindlington Elsevier Ltd 01-12-2013
Elsevier
Subjects:
Applied sciences
Barium titanate (BaTiO3)
Barium titanates
Composites
Dielectric loss
Dielectric strength
Dispersions
Electrical resistivity
Exact sciences and technology
Forms of application and semi-finished materials
High density polyethylene (HDPE)
High energy ball milling (HEBM)
Nanocomposites
Particulate composites
Polyethylenes
Polymer industry, paints, wood
Space charge
Stress-strain relationships
Technology of polymers
Dielectric strength
Barium titanate (BaTiO3)
Nanocomposites
High energy ball milling (HEBM)
High density polyethylene (HDPE)
Barium titanate (BaTiO
Dielectric loss
Electrical properties
Stress strain relation
Dielectric properties
High density ethylene polymer
Mechanical properties
)
Barium titanates
Experimental study
Oxide ceramics
Composite material
Hot pressing
Morphology
Concentration effect
Electric resistivity
Olefin polymer
Nanocomposite
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Composites of high density polyethylene, HDPE, filled with submicrometric particles of BaTiO3, BT, have been prepared. Uniform dispersion of the particles was achieved by high energy ball milling and subsequent hot pressing. Using SEM, FTIR, TGA-DTA and stress-strain tests, studies of the structural, morphological and mechanical features of the composites have been carried out. Frequency response analysis, dielectric strength and resistivity measurements were also performed to evaluate the final electrical properties as a function of the processing and the amount of BaTiO3 particles. From the analysis of the microscopic structure, it can be deduced that any change in the properties of the materials must be solely ascribed to the presence of the BT particles. A balance between an enhancement of space charge polarization with the presence of BT and the existence of permanent dipoles associated to them might explain an initial increase in the dielectric losses with the BT content, and its later decrease at higher BT content. The observed decrease in resistivity and breakdown voltage when increasing the amount of BaTiO3 can be explained by the lower resistivity of BT particles at room temperature and the growing accumulation of space charge.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0142-9418
1873-2348
DOI:10.1016/j.polymertesting.2013.08.012