On orientation memory in high density polyethylene - Carbon nanofibers composites

Mircea Chipara, Brian Jones, Dorina M. Chipara, Jianhua Li, Karen Lozano, Shah Valloppilly, David J Sellmyer

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

An orientation memory effect in high density polyethylene (HDPE) filled with vapor grown carbon nanofibers (VGCNF) is reported. Two-dimensional X-ray (2DXR) confirmed the reorientation of HDPE crystallites upon the uniaxial stretching of HDPE and HDPE filled by VGCNFs. This anisotropy of 2DXR spectra was decreased by heating all stretched samples (loaded or not loaded by VGCNFs) from room to the melting temperature of HDPE. Upon cooling these samples to room temperature, it was noticed that only the nanocomposite retained a weak partial (uniaxial) order, while HDPE showed a completely isotropic 2DXR spectrum. It was concluded that during the stretching of nanocomposites the crystallites and VGCNFs were aligned along the uniaxial stress. Upon heating, the crystalline phase was melted, while the orientation of the VGCNFs was not significantly disturbed. The recrystallization of the polymer started preferentially from the VGCNF - polymer interphase, resulting into an anisotropic crystalline structure.

Original languageEnglish (US)
Pages (from-to)303-310
Number of pages8
JournalE-Polymers
Volume17
Issue number4
DOIs
StatePublished - Jun 27 2017

Fingerprint

Carbon nanofibers
Polyethylene
High density polyethylenes
polyethylenes
Data storage equipment
composite materials
carbon
Composite materials
Crystallites
crystallites
Stretching
Nanocomposites
nanocomposites
Polymers
Vapors
vapors
Crystalline materials
Heating
heating
polymers

Keywords

  • memory
  • polyethylene
  • two-dimensional X-ray spectra
  • vapor grown carbon nanofiber

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physical and Theoretical Chemistry
  • Polymers and Plastics

Cite this

Chipara, M., Jones, B., Chipara, D. M., Li, J., Lozano, K., Valloppilly, S., & Sellmyer, D. J. (2017). On orientation memory in high density polyethylene - Carbon nanofibers composites. E-Polymers, 17(4), 303-310. https://doi.org/10.1515/epoly-2016-0286

On orientation memory in high density polyethylene - Carbon nanofibers composites. / Chipara, Mircea; Jones, Brian; Chipara, Dorina M.; Li, Jianhua; Lozano, Karen; Valloppilly, Shah; Sellmyer, David J.

In: E-Polymers, Vol. 17, No. 4, 27.06.2017, p. 303-310.

Research output: Contribution to journalArticle

Chipara, M, Jones, B, Chipara, DM, Li, J, Lozano, K, Valloppilly, S & Sellmyer, DJ 2017, 'On orientation memory in high density polyethylene - Carbon nanofibers composites', E-Polymers, vol. 17, no. 4, pp. 303-310. https://doi.org/10.1515/epoly-2016-0286
Chipara M, Jones B, Chipara DM, Li J, Lozano K, Valloppilly S et al. On orientation memory in high density polyethylene - Carbon nanofibers composites. E-Polymers. 2017 Jun 27;17(4):303-310. https://doi.org/10.1515/epoly-2016-0286
Chipara, Mircea ; Jones, Brian ; Chipara, Dorina M. ; Li, Jianhua ; Lozano, Karen ; Valloppilly, Shah ; Sellmyer, David J. / On orientation memory in high density polyethylene - Carbon nanofibers composites. In: E-Polymers. 2017 ; Vol. 17, No. 4. pp. 303-310.
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