Determination of microstructure and composition in butadiene and styrene-butadiene polymers by near-infrared spectroscopy

Journal Article · Sat Sep 01 04:00:00 EDT 1990 · Analytical Chemistry (Washington); (USA)

DOI:https://doi.org/10.1021/ac00216a011· OSTI ID:6290486

Miller, C E; Eichinger, B E ^[1]; Gurley, T W; Hermiller, J G ^[2]

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1. Univ. of Washington, Seattle (USA)
2. Goodyear Tire and Rubber Company, Akron, OH (USA)

Transmission spectroscopy in the near-infrared region (1,100-2,500 nm) is used to determine the microstructure and the composition of poly(butadiene) (PBD) polymers and styrene-butadiene (SBR) copolymers in bulk and in carbon tetrachloride solution. The multivariate method of classical least squares (CLS) is used to analyze near-infrared spectra of polymers with NMR-determined microstructures and compositions. Although the near-infrared spectra of the pure analytes (cis-1,4-butadiene, trans-1,4-butadiene, 1,2-butadiene, and styrene) are highly overlapped, the CLS method provides accurate predictions of analyte concentrations, because all available spectral frequencies are used for quantitation. The sensitivity of near-infrared spectroscopy to intermolecular interactions and neighboring-group effects in these polymers is demonstrated.

• OSTI ID: 6290486
• Journal Information: Analytical Chemistry (Washington); (USA), Journal Name: Analytical Chemistry (Washington); (USA) Vol. 62:17; ISSN 0003-2700; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKYLATED AROMATICS
AROMATICS
BUTADIENE
CALCULATION METHODS
CHEMICAL COMPOSITION
CRYSTAL STRUCTURE
DIENES
ELECTROMAGNETIC RADIATION
HYDROCARBONS
INFRARED RADIATION
INFRARED SPECTRA
MICROSTRUCTURE
NEAR INFRARED RADIATION
ORGANIC COMPOUNDS
POLYENES
POLYMERS
RADIATIONS
SPECTRA
STYRENE