1.
|
-
Mechanical, wear, and dielectric behavior of TiO2 reinforced high‐density polyethylene composites
Ponnuruthiyil Shaji, Akhil; Shaik, Mahammad Ali; Golla, Brahma Raju
Journal of applied polymer science,
June 15, 2019, Volume:
136, Issue:
23
Journal Article
Peer reviewed
ABSTRACT
Almost fully dense high‐density polyethylene (HDPE) reinforced with submicron‐sized titanium dioxide (TiO2) ceramic filler (up to 40 vol %) was fabricated using compression molding. More ...
than 98.5% ρth (theoretical density) could be obtained for all the HDPE compositions and its measured density varied between 0.94 and 2.25 g cc−1. The hardness of HDPE increased considerably from 32.6 to 69 MPa (i.e., by two times) with the addition of 40 vol % TiO2. The compression strength (19.03–34.16 MPa) and modulus of elasticity (0.49–1.05 GPa) of HDPE were also found to increase with the addition of TiO2 filler. However, the HDPE exhibited good ductility (59% strain) up to 20 vol % TiO2 and it was reduced with the further addition of TiO2. The strain decreased drastically to 7.6% for HDPE‐40 vol % TiO2. Addition of TiO2 filler leads to a considerable decrease in wear rate and coefficient of friction (COF). The wear studies revealed that the HDPE‐40% TiO2 composite exhibited a low wear rate of 1.82 × 10−5 mm3 N m−1 and COF of 0.13. The dielectric constant of HDPE (at 10 kHz) was also considerably increased from 5.31 to 20.02 with the addition of TiO2 up to 40 vol %. Achievement of such high dielectric constant for HDPE materials is the highest ever reported for HDPE. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47610.
|
Full text
|
2.
|
-
Mechanical, wear, and dielectric behavior of TiO 2 reinforced high‐density polyethylene composites
Ponnuruthiyil Shaji, Akhil; Shaik, Mahammad Ali; Golla, Brahma Raju
Journal of applied polymer science,
06/2019, Volume:
136, Issue:
23
Journal Article
Peer reviewed
ABSTRACT
Almost fully dense high‐density polyethylene (HDPE) reinforced with submicron‐sized titanium dioxide (TiO
2
) ceramic filler (up to 40 vol %) was fabricated using compression molding. More ...
than 98.5%
ρ
th
(theoretical density) could be obtained for all the HDPE compositions and its measured density varied between 0.94 and 2.25 g cc
−1
. The hardness of HDPE increased considerably from 32.6 to 69 MPa (i.e., by two times) with the addition of 40 vol % TiO
2
. The compression strength (19.03–34.16 MPa) and modulus of elasticity (0.49–1.05 GPa) of HDPE were also found to increase with the addition of TiO
2
filler. However, the HDPE exhibited good ductility (59% strain) up to 20 vol % TiO
2
and it was reduced with the further addition of TiO
2
. The strain decreased drastically to 7.6% for HDPE‐40 vol % TiO
2
. Addition of TiO
2
filler leads to a considerable decrease in wear rate and coefficient of friction (COF). The wear studies revealed that the HDPE‐40% TiO
2
composite exhibited a low wear rate of 1.82 × 10
−5
mm
3
N m
−1
and COF of 0.13. The dielectric constant of HDPE (at 10 kHz) was also considerably increased from 5.31 to 20.02 with the addition of TiO
2
up to 40 vol %. Achievement of such high dielectric constant for HDPE materials is the highest ever reported for HDPE. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci.
2019
,
136
, 47610.
|
Full text
|
