𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Determination of the composition of common linear low density polyethylene copolymers by 13C-NMR spectroscopy

✍ Scribed by M. De Pooter; P. B. Smith; K. K. Dohrer; K. F. Bennett; M. D. Meadows; C. G. Smith; H. P. Schouwenaars; R. A. Geerards

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
473 KB
Volume
42
Category
Article
ISSN
0021-8995

No coin nor oath required. For personal study only.

✦ Synopsis

A comprehensive I3C-NMR method for the analysis of composition in the most common commercial polyethylene copolymers has been established. The method covers ethene copolymers with propene, butene-1, hexene-1, octene-1, and 4-methyl pentene-1 in the composition range of 1-10 mol %. The chemical shift assignments and TI values of the resonances of the copolymers are presented. Results of precision studies and interlaboratory analyses showed that the molar composition could be determined with a relative precision at 2a of about 6%. This method is being proposed to ASTM as Method X70-8605-2.

πŸ“œ SIMILAR VOLUMES

Determination of the structural configur
Determination of the structural configuration of cresol–novolak resins by 13C NMR spectroscopy
✍ J. A. Carothers; E. Gipstein; W. W. Fleming; T. Tompkins πŸ“‚ Article πŸ“… 1982 πŸ› John Wiley and Sons 🌐 English βš– 310 KB πŸ‘ 1 views

## Abstract ^13^C NMR spectroscopy was used to investigate the structures of a series of pure isomeric cresylic novolak resins. Chemical shifts were measured and assigned, and end groups were distinguished from the central repeat units of the chains. Based on these measurements, the number average