Resolution of crystal split fundamentals of polyethylene by Raman difference spectroscopy

J. R. Scherer; R. G. Snyder; S. J. Krause

doi:10.1021/j100468a013

Resolution of crystal split fundamentals of polyethylene by Raman difference spectroscopy

J. R. Scherer, R. G. Snyder, S. J. Krause

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Abstract

Raman difference measurements are reported for an oriented polyethylene "solid-state" extrudate. The sample was found to be uniaxial at the center and nonuniaxial at the edge. Difference techniques lead to a resolution of the correlation split antisymmetric CC stretch (ν₄(π)) and CH₂ twisting (ν₇(π)) fundamentals at room temperature. The splitting for the CH₂ wagging (ν₃(π)) fundamental is observed for the first time and the higher frequency component is unambiguously assigned to species B_2g(ca). The degree of a axis orientation at the edge of the extrudate is estimated.

Original language	English (US)
Pages (from-to)	626-628
Number of pages	3
Journal	Journal of physical chemistry
Volume	83
Issue number	5
DOIs	https://doi.org/10.1021/j100468a013
State	Published - Jan 1 1979
Externally published	Yes

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Engineering(all)
Physical and Theoretical Chemistry

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10.1021/j100468a013

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year = "1979",

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T1 - Resolution of crystal split fundamentals of polyethylene by Raman difference spectroscopy

AU - Scherer, J. R.

AU - Snyder, R. G.

AU - Krause, S. J.

PY - 1979/1/1

Y1 - 1979/1/1

N2 - Raman difference measurements are reported for an oriented polyethylene "solid-state" extrudate. The sample was found to be uniaxial at the center and nonuniaxial at the edge. Difference techniques lead to a resolution of the correlation split antisymmetric CC stretch (ν4(π)) and CH2 twisting (ν7(π)) fundamentals at room temperature. The splitting for the CH2 wagging (ν3(π)) fundamental is observed for the first time and the higher frequency component is unambiguously assigned to species B2g(ca). The degree of a axis orientation at the edge of the extrudate is estimated.

AB - Raman difference measurements are reported for an oriented polyethylene "solid-state" extrudate. The sample was found to be uniaxial at the center and nonuniaxial at the edge. Difference techniques lead to a resolution of the correlation split antisymmetric CC stretch (ν4(π)) and CH2 twisting (ν7(π)) fundamentals at room temperature. The splitting for the CH2 wagging (ν3(π)) fundamental is observed for the first time and the higher frequency component is unambiguously assigned to species B2g(ca). The degree of a axis orientation at the edge of the extrudate is estimated.

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ER -

Resolution of crystal split fundamentals of polyethylene by Raman difference spectroscopy

Abstract

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