✦ LIBER ✦

Revisions to the microstructural assignments of poly(ethyl cyanoacrylate)

✍ Scribed by Douglas R. Robello; Teresa D. Eldridge; Frank M. Michaels

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 131 KB
Volume: 37
Category: Article
ISSN: 0887-624X
DOI: 10.1002/(sici)1099-0518(19990701)37:13<2219::aid-pola36>3.0.co;2-r

No coin nor oath required. For personal study only.

✦ Synopsis

The tacticity assignments from the literature for the 13 C-NMR signals of the side-chain methylene group of poly(ethyl cyanoacrylate) are reversed, and new assignments of the main-chain methylene group are proposed. The assignments were made possible by a combination of DEPT and HETCOR NMR experiments on samples of varying microstructure distributions. The polymer tends toward syndiotacticity, not isotacticity as previously reported. The distribution of stereoisomers fits well to a Bernoulian statistical model. The stereochemical assignments were corroborated by similar analyses of a model compound for two cyanoacrylate repeat units.

📜 SIMILAR VOLUMES

The effect of heat on the molecular weig

The effect of heat on the molecular weight of poly(ethyl 2-cyanoacrylate) adhesive

✍ J. Guthrie; M. S. Otterburn; J. M. Rooney; C. N. Tsang 📂 Article 📅 1985 🏛 John Wiley and Sons 🌐 English ⚖ 277 KB 👁 2 views

Revision of the Structure Assigned to th

Revision of the Structure Assigned to the Antibiotic BU-4664L from Micromonopora.

✍ Yasuhiro Igarashi; Satoshi Miyanaga; Hiroyasu Onaka; Michinori Takeshita; Tamots 📂 Article 📅 2005 🏛 John Wiley and Sons ⚖ 10 KB

Revision of the Structures Assigned to t

Revision of the Structures Assigned to the Fungal Metabolites Boletunones A and B.

✍ Wolfgang Steglich; Veronika Hellwig 📂 Article 📅 2004 🏛 John Wiley and Sons ⚖ 14 KB

## Abstract For Abstract see ChemInform Abstract in Full Text.

Revision of Microkinetic Approaches to t

Revision of Microkinetic Approaches to the Liquid-Phase Synthesis of Ethyl tert-Butyl Ether (ETBE)

✍ S. Schwarzer; C. Horst; U. Kunz; U. Hoffmann 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 190 KB 👁 2 views

Characteristic ratio of the mean-square

Characteristic ratio of the mean-square end-to-end distance of poly(vinylidene fluoride) with microstructural defects

✍ Zhiping Zhou; Deyue Yan; Giovanni C. Alfonso 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 English ⚖ 353 KB

The segment length distribution of isoregic head-to-head and tail-to-tail sequences in poly-(vinylidene fluoride) (PVF,) a) chains is calculated from I9F NMR literature data. It is found that the average length of inverse segments is very close to one unit; therefore almost all head-to-head defects

Assignment of the 1H and 13C NMR spectra

Assignment of the 1H and 13C NMR spectra and stereochemical analysis of radical-initiated poly(1-naphthylmethyl acrylate) and poly[2-(1-naphthyl)ethyl acrylate]

✍ Apostolos Spyros; Photis Dais; Frank Heatley 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 English ⚖ 360 KB

## Abstract Resonances in the ^1^H and ^13^C NMR spectra of free‐radical polymerised poly(1‐naphthylmethyl acrylate) (PNMA) and poly[2‐(1‐naphthyl)ethyl acrylate] (PNEA) have been assigned using two‐dimensional techniques. The stereosequence distribution in both polymers obeyed Bernoullian statisti