Rotor‐synchronized two‐dimensional 13C CP/MAS NMR studies of the orientational order of polymers. I. High‐performance ultrahigh molecular weight polyethylene fibers

D. L. Tzou, Tai-huang Huang, P. Desai, A. S. Abhiraman

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The orientational order of three morphological components, identified previously as two crystalline components, C1 and C2, and an amorphous component, A of four polyethylene fibers, including two gelspun ultrahigh molecular weight (PE‐I and PE‐II) and two meltspun moderate molecular weight (PE‐D and PE) polyethylene fibers are further analyzed by rotor‐synchronized two‐dimensional 13C CP/MAS (ROSMAS) nuclear magnetic resonance (NMR) techniques. Our results indicate that the orientational order of these components differ substantially among themselves in a given fiber and among different fibers of the same component. Values of β1/2, the polar angle at which the orientational distribution function (ODF) P 〈β〉 decays to half its maximum, are determined to be: 18° (C2 of PE‐II), 21° (C2 of PE‐I), 29° (C2 of PE‐D), 31° (C1 of PE‐I) and 50° (C2 of PE). No orientational sideband can be detected for component A, suggesting that the A component is due to the amorphous domain. The implication of this results and the technical limit of this technique are analyzed. © 1993 John Wiley & Sons, Inc.

Original languageEnglish
Pages (from-to)1005-1012
Number of pages8
JournalJournal of Polymer Science Part B: Polymer Physics
Volume31
Issue number8
DOIs
Publication statusPublished - 1993 Jan 1

Fingerprint

Ultrahigh molecular weight polyethylenes
Polyetherimides
polyethylenes
molecular weight
Polymers
Nuclear magnetic resonance
nuclear magnetic resonance
fibers
Fibers
polymers
Polyethylene
Polyethylenes
Molecular weight
Distribution functions
Crystalline materials
ultra-high molecular weight polyethylene
sidebands
distribution functions
decay

Keywords

  • NMR
  • fibers
  • orientational order
  • polyethylene

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Cite this

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title = "Rotor‐synchronized two‐dimensional 13C CP/MAS NMR studies of the orientational order of polymers. I. High‐performance ultrahigh molecular weight polyethylene fibers",
abstract = "The orientational order of three morphological components, identified previously as two crystalline components, C1 and C2, and an amorphous component, A of four polyethylene fibers, including two gelspun ultrahigh molecular weight (PE‐I and PE‐II) and two meltspun moderate molecular weight (PE‐D and PE) polyethylene fibers are further analyzed by rotor‐synchronized two‐dimensional 13C CP/MAS (ROSMAS) nuclear magnetic resonance (NMR) techniques. Our results indicate that the orientational order of these components differ substantially among themselves in a given fiber and among different fibers of the same component. Values of β1/2, the polar angle at which the orientational distribution function (ODF) P 〈β〉 decays to half its maximum, are determined to be: 18° (C2 of PE‐II), 21° (C2 of PE‐I), 29° (C2 of PE‐D), 31° (C1 of PE‐I) and 50° (C2 of PE). No orientational sideband can be detected for component A, suggesting that the A component is due to the amorphous domain. The implication of this results and the technical limit of this technique are analyzed. {\circledC} 1993 John Wiley & Sons, Inc.",
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T1 - Rotor‐synchronized two‐dimensional 13C CP/MAS NMR studies of the orientational order of polymers. I. High‐performance ultrahigh molecular weight polyethylene fibers

AU - Tzou, D. L.

AU - Huang, Tai-huang

AU - Desai, P.

AU - Abhiraman, A. S.

PY - 1993/1/1

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N2 - The orientational order of three morphological components, identified previously as two crystalline components, C1 and C2, and an amorphous component, A of four polyethylene fibers, including two gelspun ultrahigh molecular weight (PE‐I and PE‐II) and two meltspun moderate molecular weight (PE‐D and PE) polyethylene fibers are further analyzed by rotor‐synchronized two‐dimensional 13C CP/MAS (ROSMAS) nuclear magnetic resonance (NMR) techniques. Our results indicate that the orientational order of these components differ substantially among themselves in a given fiber and among different fibers of the same component. Values of β1/2, the polar angle at which the orientational distribution function (ODF) P 〈β〉 decays to half its maximum, are determined to be: 18° (C2 of PE‐II), 21° (C2 of PE‐I), 29° (C2 of PE‐D), 31° (C1 of PE‐I) and 50° (C2 of PE). No orientational sideband can be detected for component A, suggesting that the A component is due to the amorphous domain. The implication of this results and the technical limit of this technique are analyzed. © 1993 John Wiley & Sons, Inc.

AB - The orientational order of three morphological components, identified previously as two crystalline components, C1 and C2, and an amorphous component, A of four polyethylene fibers, including two gelspun ultrahigh molecular weight (PE‐I and PE‐II) and two meltspun moderate molecular weight (PE‐D and PE) polyethylene fibers are further analyzed by rotor‐synchronized two‐dimensional 13C CP/MAS (ROSMAS) nuclear magnetic resonance (NMR) techniques. Our results indicate that the orientational order of these components differ substantially among themselves in a given fiber and among different fibers of the same component. Values of β1/2, the polar angle at which the orientational distribution function (ODF) P 〈β〉 decays to half its maximum, are determined to be: 18° (C2 of PE‐II), 21° (C2 of PE‐I), 29° (C2 of PE‐D), 31° (C1 of PE‐I) and 50° (C2 of PE). No orientational sideband can be detected for component A, suggesting that the A component is due to the amorphous domain. The implication of this results and the technical limit of this technique are analyzed. © 1993 John Wiley & Sons, Inc.

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