✦ LIBER ✦

Investigation of microstructure of the acrylonitrile-styrene copolymers by 2-D NMR spectroscopy

✍ Scribed by A. S. Brar; S. K. Hekmatyar

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 211 KB
Volume: 37
Category: Article
ISSN: 0887-624X
DOI: 10.1002/(sici)1099-0518(19990315)37:6<721::aid-pola7>3.0.co;2-e

No coin nor oath required. For personal study only.

✦ Synopsis

Acrylonitrile-Styrene (A/S) copolymers were prepared by photopolymerization using uranyl nitrate ion as initiator. The copolymer compositions were determined by elemental analysis, and comonomer reactivity ratios were determined by nonlinear least squares error in variables method (EVM). The complete spectral assignment of the 13 C and 1 H-NMR spectra were done with the help of Distortionless Enhancement by Polarization Transfer (DEPT) and by the two dimensional 13 C-1 H Heteronuclear Single Quantum Correlation (HSQC) and TOCSY experiments. The methylene and methine carbon resonance show both stereochemical and compositional sensitivity. The 2-D Total Correlated Spectroscopy (TOCSY) experiment was used to ascertain the various geminal coupling between the methylene protons.

📜 SIMILAR VOLUMES

Determination of microstructure of styre

Determination of microstructure of styrene-acrylonitrile copolymers by 1H- and 13C-NMR spectroscopy

✍ D. Doskočilová; L. Terlemezyan; B. Gantchev; M. Michailov 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 English ⚖ 279 KB 👁 1 views

Microstructural characterization of acry

Microstructural characterization of acrylonitrile/pentyl acrylate copolymers by one and 2-D NMR spectroscopy

✍ A. S. Brar; Kaushik Dutta 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 312 KB 👁 1 views

Acrylonitrile/pentyl acrylate (A/P) copolymers of different monomer composition were prepared by solution polymerization using benzoyl peroxide as initiator. Copolymer compositions were determined by elemental analysis and quantitative 13 C 1 H-NMR spectroscopy. The comonomer reactivity ratios, det

Microstructure determination of the acry

Microstructure determination of the acrylonitrile–styrene–methyl methacrylate terpolymers by NMR spectroscopy

✍ A. S. Brar; S. K. Hekmatyar 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 137 KB 👁 1 views

Acrylonitrile-styrene-methyl methacrylate (A-S-M) terpolymers were prepared by photopolymerization using uranyl nitrate ions as photo initiators, which were analyzed by NMR spectroscopy. The terpolymer compositions were determined by Goldfinger's equation using comonomer reactivity ratios: r as ϭ 0.

Microstructure analysis of poly(styrene-

Microstructure analysis of poly(styrene-co-vinylidene chloride) copolymers by NMR spectroscopy

✍ A. S. Brar; S. K. Hekmatyar 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 324 KB

Investigation of the microstructure of m

Investigation of the microstructure of metallocene-catalyzed norbornene–ethylene copolymers using NMR spectroscopy

✍ Christer H. Bergström; Bernd R. Sperlich; Juhana Ruotoistenmäki; Jukka V. Seppäl 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 196 KB 👁 1 views

Norbornene-ethylene copolymers were prepared using the metallocene catalyst ethylene bis (indenyl) zirconium dichloride with MAO, and their microstructure was characterized with 1 H-NMR and 13 C-NMR methods. From a Cosy 1 H-NMR spectrum it was found that all norbornene units are enchained in the exo

Microstructure of vinylidene chloride-et

Microstructure of vinylidene chloride-ethyl acrylate copolymers by one- and two-dimensional NMR spectroscopy

✍ A. S. Brar; Meenakshi Malhotra 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 254 KB 👁 1 views

Vinylidene chloride / ethyl acrylate ( V / E ) copolymers were prepared by photopolymerization using uranyl ion as a photosensitizer at room temperature. Copolymers were characterized by chlorine estimation, gel permeation chromatography, 1 H-and 13 C-NMR, 2D heteronuclear single quantum correlatio