Structured Polyethylene Nanocomposites

Effects of Crystal Orientation and Nanofiller Alignment on High Field Dielectric Properties

Bo Li, C. I. Camilli, P. I. Xidas, K. S. Triantafyllidis, Evangelos Manias

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In previous work we have shown that aligned high aspect-ratio (pseudo-2D) nanofillers can yield large dielectric breakdown strength (EBD) improvements for a nanocomposite with a low-crystallinity polyethylene matrix. Here, we report a systematic study which delineates the contributions of the aligned inorganic fillers and of the aligned polymer crystallites in the overall EBD improvement achieved in the nanocomposites. Specifically, extrusion blown-molded polyethylene/montmorillonite nanocomposite films were cold-stretched to various strains, to further align the nanoparticles parallel to the film surface; this filler alignment is accompanied by a commensurate alignment of the polymer crystallites, especially those heterogeneously nucleated by the fillers. A systematic series of films are studied, with increased extent of alignment of the fillers and of the crystalline lamellae (quantified through Hermans orientation order parameters from 2D X-ray diffraction studies) and the aligned structure is correlated to the electric field breakdown strength (quantified through Weibull failure studies). It is shown that aligned pseudo-2D inorganic nanofillers provide additional strong improvements in EBD, improvements that are beyond, and added in excess of, any EBD increases due to polymer-crystal orientation.

Original languageEnglish (US)
Pages (from-to)363-368
Number of pages6
JournalMRS Advances
Volume2
Issue number6
DOIs
StatePublished - Jan 1 2017

Fingerprint

Polyethylene
fillers
Crystal orientation
Dielectric properties
Polyethylenes
Fillers
dielectric properties
polyethylenes
Nanocomposites
nanocomposites
alignment
Polymers
Crystallites
crystallites
crystals
polymers
breakdown
Bentonite
Nanocomposite films
lamella

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

@article{e23e861b79344f028de0b0c1ffbe0336,
title = "Structured Polyethylene Nanocomposites: Effects of Crystal Orientation and Nanofiller Alignment on High Field Dielectric Properties",
abstract = "In previous work we have shown that aligned high aspect-ratio (pseudo-2D) nanofillers can yield large dielectric breakdown strength (EBD) improvements for a nanocomposite with a low-crystallinity polyethylene matrix. Here, we report a systematic study which delineates the contributions of the aligned inorganic fillers and of the aligned polymer crystallites in the overall EBD improvement achieved in the nanocomposites. Specifically, extrusion blown-molded polyethylene/montmorillonite nanocomposite films were cold-stretched to various strains, to further align the nanoparticles parallel to the film surface; this filler alignment is accompanied by a commensurate alignment of the polymer crystallites, especially those heterogeneously nucleated by the fillers. A systematic series of films are studied, with increased extent of alignment of the fillers and of the crystalline lamellae (quantified through Hermans orientation order parameters from 2D X-ray diffraction studies) and the aligned structure is correlated to the electric field breakdown strength (quantified through Weibull failure studies). It is shown that aligned pseudo-2D inorganic nanofillers provide additional strong improvements in EBD, improvements that are beyond, and added in excess of, any EBD increases due to polymer-crystal orientation.",
author = "Bo Li and Camilli, {C. I.} and Xidas, {P. I.} and Triantafyllidis, {K. S.} and Evangelos Manias",
year = "2017",
month = "1",
day = "1",
doi = "10.1557/adv.2016.638",
language = "English (US)",
volume = "2",
pages = "363--368",
journal = "MRS Advances",
issn = "2059-8521",
number = "6",

}

Structured Polyethylene Nanocomposites : Effects of Crystal Orientation and Nanofiller Alignment on High Field Dielectric Properties. / Li, Bo; Camilli, C. I.; Xidas, P. I.; Triantafyllidis, K. S.; Manias, Evangelos.

In: MRS Advances, Vol. 2, No. 6, 01.01.2017, p. 363-368.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Structured Polyethylene Nanocomposites

T2 - Effects of Crystal Orientation and Nanofiller Alignment on High Field Dielectric Properties

AU - Li, Bo

AU - Camilli, C. I.

AU - Xidas, P. I.

AU - Triantafyllidis, K. S.

AU - Manias, Evangelos

PY - 2017/1/1

Y1 - 2017/1/1

N2 - In previous work we have shown that aligned high aspect-ratio (pseudo-2D) nanofillers can yield large dielectric breakdown strength (EBD) improvements for a nanocomposite with a low-crystallinity polyethylene matrix. Here, we report a systematic study which delineates the contributions of the aligned inorganic fillers and of the aligned polymer crystallites in the overall EBD improvement achieved in the nanocomposites. Specifically, extrusion blown-molded polyethylene/montmorillonite nanocomposite films were cold-stretched to various strains, to further align the nanoparticles parallel to the film surface; this filler alignment is accompanied by a commensurate alignment of the polymer crystallites, especially those heterogeneously nucleated by the fillers. A systematic series of films are studied, with increased extent of alignment of the fillers and of the crystalline lamellae (quantified through Hermans orientation order parameters from 2D X-ray diffraction studies) and the aligned structure is correlated to the electric field breakdown strength (quantified through Weibull failure studies). It is shown that aligned pseudo-2D inorganic nanofillers provide additional strong improvements in EBD, improvements that are beyond, and added in excess of, any EBD increases due to polymer-crystal orientation.

AB - In previous work we have shown that aligned high aspect-ratio (pseudo-2D) nanofillers can yield large dielectric breakdown strength (EBD) improvements for a nanocomposite with a low-crystallinity polyethylene matrix. Here, we report a systematic study which delineates the contributions of the aligned inorganic fillers and of the aligned polymer crystallites in the overall EBD improvement achieved in the nanocomposites. Specifically, extrusion blown-molded polyethylene/montmorillonite nanocomposite films were cold-stretched to various strains, to further align the nanoparticles parallel to the film surface; this filler alignment is accompanied by a commensurate alignment of the polymer crystallites, especially those heterogeneously nucleated by the fillers. A systematic series of films are studied, with increased extent of alignment of the fillers and of the crystalline lamellae (quantified through Hermans orientation order parameters from 2D X-ray diffraction studies) and the aligned structure is correlated to the electric field breakdown strength (quantified through Weibull failure studies). It is shown that aligned pseudo-2D inorganic nanofillers provide additional strong improvements in EBD, improvements that are beyond, and added in excess of, any EBD increases due to polymer-crystal orientation.

UR - http://www.scopus.com/inward/record.url?scp=85041355972&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85041355972&partnerID=8YFLogxK

U2 - 10.1557/adv.2016.638

DO - 10.1557/adv.2016.638

M3 - Article

VL - 2

SP - 363

EP - 368

JO - MRS Advances

JF - MRS Advances

SN - 2059-8521

IS - 6

ER -