Local motion in the beta-transition range of partially crystalline polyethylene studied by neutron scattering

B. Holzer; G. Strobl; B. Stuhn; N.H. Andersen

doi:10.1007/BF00654170

Local motion in the beta-transition range of partially crystalline polyethylene studied by neutron scattering

B. Holzer, G. Strobl, B. Stuhn, N.H. Andersen

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

We have performed inelastic neutron scattering experiments on protonated and fully deuterated partially crystalline polyethylene. Using a high-resolution, three-axes spectrometer with an energy resolution of 80 μeV, it was possible to detect a quasielastic process in the dynamic structure factor with a FWHM of 0.3 meV. This process was shown to be active above T₀=260 K and its FWHM was nearly independent of temperature and scattering vector. The spatial extent of the underlying motional process was displacement increases strongly with T above T₀ up to 4 Å² at T=380 K. Comparison with results from similar work on fully amorphous polymers suggests to relate T₀ to the glass transition of the amorphous phase in partially crystalline polyethylene. The coherent structure factor showns no evidence for a significant contribution of correlated motion to the process. A speculative explanation of the observed phenomenon as a non-equilibrium soft-mode is proposed.

Original language	English
Journal	Colloid and Polymer Science
Volume	272
Issue number	11
Pages (from-to)	1396-1402
ISSN	0303-402X
DOIs	https://doi.org/10.1007/BF00654170
Publication status	Published - 1994

Access to Document

10.1007/BF00654170

OpenUrl availability

Full text

Cite this

@article{86b079416fdf45899747185b45ac532c,

title = "Local motion in the beta-transition range of partially crystalline polyethylene studied by neutron scattering",

abstract = "We have performed inelastic neutron scattering experiments on protonated and fully deuterated partially crystalline polyethylene. Using a high-resolution, three-axes spectrometer with an energy resolution of 80 μeV, it was possible to detect a quasielastic process in the dynamic structure factor with a FWHM of 0.3 meV. This process was shown to be active above T0=260 K and its FWHM was nearly independent of temperature and scattering vector. The spatial extent of the underlying motional process was displacement increases strongly with T above T0 up to 4 {\AA}2 at T=380 K. Comparison with results from similar work on fully amorphous polymers suggests to relate T0 to the glass transition of the amorphous phase in partially crystalline polyethylene. The coherent structure factor showns no evidence for a significant contribution of correlated motion to the process. A speculative explanation of the observed phenomenon as a non-equilibrium soft-mode is proposed.",

keywords = "Materialer med s{\ae}rlige fysiske og kemiske egenskaber",

author = "B. Holzer and G. Strobl and B. Stuhn and N.H. Andersen",

year = "1994",

doi = "10.1007/BF00654170",

language = "English",

volume = "272",

pages = "1396--1402",

journal = "Colloid and Polymer Science",

issn = "0303-402X",

publisher = "Springer",

number = "11",

}

TY - JOUR

T1 - Local motion in the beta-transition range of partially crystalline polyethylene studied by neutron scattering

AU - Holzer, B.

AU - Strobl, G.

AU - Stuhn, B.

AU - Andersen, N.H.

PY - 1994

Y1 - 1994

N2 - We have performed inelastic neutron scattering experiments on protonated and fully deuterated partially crystalline polyethylene. Using a high-resolution, three-axes spectrometer with an energy resolution of 80 μeV, it was possible to detect a quasielastic process in the dynamic structure factor with a FWHM of 0.3 meV. This process was shown to be active above T0=260 K and its FWHM was nearly independent of temperature and scattering vector. The spatial extent of the underlying motional process was displacement increases strongly with T above T0 up to 4 Å2 at T=380 K. Comparison with results from similar work on fully amorphous polymers suggests to relate T0 to the glass transition of the amorphous phase in partially crystalline polyethylene. The coherent structure factor showns no evidence for a significant contribution of correlated motion to the process. A speculative explanation of the observed phenomenon as a non-equilibrium soft-mode is proposed.

AB - We have performed inelastic neutron scattering experiments on protonated and fully deuterated partially crystalline polyethylene. Using a high-resolution, three-axes spectrometer with an energy resolution of 80 μeV, it was possible to detect a quasielastic process in the dynamic structure factor with a FWHM of 0.3 meV. This process was shown to be active above T0=260 K and its FWHM was nearly independent of temperature and scattering vector. The spatial extent of the underlying motional process was displacement increases strongly with T above T0 up to 4 Å2 at T=380 K. Comparison with results from similar work on fully amorphous polymers suggests to relate T0 to the glass transition of the amorphous phase in partially crystalline polyethylene. The coherent structure factor showns no evidence for a significant contribution of correlated motion to the process. A speculative explanation of the observed phenomenon as a non-equilibrium soft-mode is proposed.

KW - Materialer med særlige fysiske og kemiske egenskaber

U2 - 10.1007/BF00654170

DO - 10.1007/BF00654170

M3 - Journal article

SN - 0303-402X

VL - 272

SP - 1396

EP - 1402

JO - Colloid and Polymer Science

JF - Colloid and Polymer Science

IS - 11

ER -

Local motion in the beta-transition range of partially crystalline polyethylene studied by neutron scattering

Abstract

Access to Document

OpenUrl availability

Fingerprint

Cite this