Two-dimensional near-infrared correlation spectroscopy studies of compatible polymer blends: composition-dependent spectral variations of blends of atactic polystyrene and poly(2,6-dimethyl-1,4-phenylene ether)
Article Abstract:
It has been possible to demonstrate the potential value of generalized 2D near-infrared correlation spectroscopy in investigations of polymer blends. When linked with near-infrared diffuse reflectance spectroscopy, 2D correlation spectroscopy is a strong tool in analyzing polymer blends.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2000
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Two-dimensional Fourier transform Raman correlation spectroscopy study of composition-induced structural changes in a series of ethylene/vinyl acetate copolymers
Article Abstract:
The composition-induced structural variations in 11 different ethylene/vinyl acetate (EVA) copolymers with vinyl acetate (VA) content ranging form 6-42 wt % were investigated using 2D Fourier transform Raman correlation spectroscopy. The copolymer samples were grouped into four sets based on their composition range. In all the composition range of EVA copolymers, it was observed that the increase in VA content results to a shrinkage of the crystalline lamellae, expansion of amorphous interlamellar layers, decrease of all-trans-(CH2)-n conformers and increase of gauche conformers.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
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Two-dimensional infrared correlation spectroscopy studies of polymer blends: conformational changes and specific interactions in blends of atactic polystyrene and poly(2,6-dimethyl-1,4-phenylene ether)
Article Abstract:
The two-dimensional infrared correlation spectroscopy was used to investigate the intermolecular interactions without hydrogen bonding in blends of atactic polystyrene (PS) and poly(2,6-dimethyl-1,4-phenylene ether) (PPE). The main chain of PS was found to pack favorably with PPE in the blends and exist in a highly organized state. The favorable packing between PS and PPE requires that the PPE chains adopt conformation A or B. Results also indicated that the CH3 groups of PPE are essential to the formation of the blends.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
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