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Titolo:
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)
Autore:
Ren, YZ; Murakami, T; Nishioka, T; Nakashima, K; Noda, I; Ozaki, Y;
Indirizzi:
Procter & Gamble Co, Miami Valley Labs, Cincinnati, OH 45253 USA Procter &Gamble Co Cincinnati OH USA 45253 abs, Cincinnati, OH 45253 USA Kwansei Gakuin Univ, Sch Sci, Dept Chem, Nishinomiya, Hyogo 6628501, JapanKwansei Gakuin Univ Nishinomiya Hyogo Japan 6628501 Hyogo 6628501, Japan Idemitsu Petrochem Co Ltd, Ichihara 2990193, Japan Idemitsu Petrochem Co Ltd Ichihara Japan 2990193 Ichihara 2990193, Japan Saga Univ, Fac Sci & Engn, Dept Chem, Saga 8498502, Japan Saga Univ SagaJapan 8498502 Sci & Engn, Dept Chem, Saga 8498502, Japan
Titolo Testata:
JOURNAL OF PHYSICAL CHEMISTRY B
fascicolo: 4, volume: 104, anno: 2000,
pagine: 679 - 690
SICI:
1520-6106(20000203)104:4<679:TNCSSO>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
2-DIMENSIONAL CORRELATION SPECTROSCOPY; PURE LIQUID-STATE; N-METHYLACETAMIDE; IR SPECTROSCOPY; TEMPERATURE; RAMAN; NYLON-12; BEHAVIOR; ALCOHOL; NIR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
41
Recensione:
Indirizzi per estratti:
Indirizzo: Noda, I Procter & Gamble Co, Miami Valley Labs, POB 538707, Cincinnati, OH45253 USA Procter & Gamble Co POB 538707 Cincinnati OH USA 45253 H 45253 USA
Citazione:
Y.Z. Ren et al., "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)", J PHYS CH B, 104(4), 2000, pp. 679-690

Abstract

Generalized two-dimensional near-infrared (2D NIR) correlation spectroscopy has been applied to the study of the conformational changes and specific interactions in blends of atactic polystyrene (PS) and poly(2,6-dimethyl-1,4-phenylene ether) (PPE). NIR diffuse reflectance spectra have been measured for PS, PPE, and their blends of different compositions: PS/PPE = 90/10, 70/30, 50/50, 30/70, 10/90. The samples are divided into two sets for 2D correlation: set A with high PS content (PS/PPE = 100/0, 90/10, 70/30) and set B with high PPE content (PS/PPE = 50/50, 30/70, 10/90). The 2D synchronous correlation analysis separates the bands of PS from those of PPE. The 2D asynchronous correlation analysis produces cross-peaks that are indicative of the specific interaction or the conformational change in the blends. Two"blend bands" are identified at 8443 cm(-1) (PPE) and 6887 cm(-1) (PS), whose origin has been attributed to the molecular level changes induced by the formation of blends. It is found that the NIR region of 7700-6400 cm(-1) is most suitable for 2D analysis of the specific interaction between PS andPPE, while the region of 5600-4900 cm(-1) is best for 2D analysis of the conformational features. common to both sets A and B, and the region 4750-4300 cm(-1) is best for conformational features unique to set A or B. It is concluded that not only the phenyl rings of PS and PPE but also the CH3 groups of PPE play important roles in the formation of the blends.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 14/07/20 alle ore 11:45:02