NMR Studies of Molecular Motions of Polymers

Solid State Nmr of Polymers: a Review of Molecular Motions and Morphology

Investigations of Random Molecular Motions by NMR

The aim of this contribution is to demonstrate that NMR spin relaxation is an efficient method for the investigation of random molecular motions. Information on random motion is important for the characterization of liquids, polymers, and biological samples. Random motions are time-dependent phenomena and have to be treated with timedependent statistical mechanics. On the other hand, spin relax...

2d Nmr Studies of Synthetic Polymers

Solution and solid state two dimensional NMR are important tools for materials characterization, and for understanding the structure and dynamics of polymers. The power of NMR as a tool arises from its ability to visualize individual sites along the polymer main chain and side chain, making it possible to relate the structure and dynamics at the molecular level to the bulk macroscopic propertie...

postnatal studies of bats (pipistrellus kuhlii and miniopterus schreibersii) & histomorphology and histochemistry studies of organs and diseases of (neurergus microspilotus and n. kaiseri)

1. to determine whether difference in birth body mass influenced growth performance in pipistrellus kuhlii we studied a total of 12 captive-born neonates. bats were assigned to two body mass groups: light birth body mass (lbw: 0.89 ± 0.05, n=8) and heavy birth body mass (hbw: 1.35 ± 0.08, n=4). heavier body mass at birth was associated with rapid postnatal growth (body mass and forearm length) ...

NMR Studies on Molecular Motions in Two Solid Phases of t-Butylammonium Tetrafluoroborate

Z. Naturforsch. 53 a, 796-800 (1998); received May 30, 1998 Differential thermal analysis (DTA), differential scanning calorimetry (DSC), and the temperature dependence of the spin-lattice relaxation time (T{) and the second moment (M2) of H and F NMR were studied in (CH3)3CNH3BF4 and (CH3)3CND3BF4. DTA and DSC revealed a solid-solid phase transition at 219 K for (CH3)3CNH3BF4 and at 221 K for ...