𝔖 Bobbio Scriptorium
✦   LIBER   ✦

CAESURA Studies of Helical Jump Motions in Semi-Crystalline Polymers

✍ Scribed by Limin Shao; Jeremy J. Titman

Book ID
102483744
Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
296 KB
Volume
208
Category
Article
ISSN
1022-1352

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Applications of the CAESURA experiment to studies of helical jump motions in semi‐crystalline polymers are described. CAESURA is a recently proposed magic angle spinning exchange NMR experiment which provides detailed information about the timescale and geometry of molecular motions. The potential utility of CAESURA in studies of helical jump motions in a range semi‐crystalline polymers is illustrated using simulated data. In addition, a full experimental investigation of isotactic poly(propylene) is described which confirms the geometry of the helical jump motion and provides a measurement of the jump rate.

magnified image

πŸ“œ SIMILAR VOLUMES

Pulsed electron nuclear double resonance
Pulsed electron nuclear double resonance study of molecular motions of radicals in a high-strength liquid-crystalline polymer
✍ M. Hubrich; G.G. Maresch; H.W. Spiess πŸ“‚ Article πŸ“… 1994 πŸ› Elsevier Science 🌐 English βš– 494 KB

Radicals in a liquid-crystalline copolyester are studied by pulsed electron paramagnetic resonance (EPR) and pulsed electron nuclear double resonance (ENDOR). For the first time transient ENDOR techniques are used to investigate molecular motion of radicals in a disordered solid. The nuclear phase m