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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
51

Applications of solid-state NMR spectroscopy to a reactively processed polyether-polyamide block copolymer

Friebel, Stefan January 1995 (has links)
Solid-state NMR has become a powerful tool for studies of structural and physical properties of polymers. This thesis investigates a technically produced block copolymer . by means of solid-state NMR. The properties which are of principal interest are the heterogeneity on various scales ranging from molecular (unit cell) to macroscopic (morphology), and molecular motion in solids. The important question of cross polarisation is addressed. Quantification of depolarisation experiments will bring some more insight into the origins of the polarisation transfer. Basically a model by Muller, Kumar and Ernst has been used to describe the polarisation transfer. Novel results are reported in this area spin-lattice relaxation measurements, both in the laboratory and on-resonance rotating frames of resonance are applied to the block copolymer. An attempt is made to address the relation of the observed relaxation times and the macroscopic properties. The behaviour of the observed and the intrinsic properties of the various regions of the heterogeneous system in the presence of spin diffusion is investigated. The system is simulated by a computer model, which allows quantification of the dimensions of the different regions. Comparison with small-angle X-ray diffraction measurements illustrates the accuracy of this new powerful technique.
52

Behavior of Magnetic Resonance Imaging Contrast Agents under Magic-Angle-Spinning

Liu, Jhih-Jhong 15 August 2007 (has links)
none
53

Development of models for the optimum assignment of manpower in a spinning room

Galanopoulos, George Spiridon January 1978 (has links)
No description available.
54

A study of the effects produced on yarn qualities by varying the amount of draft in the drawing process

Moore, Roy Lee January 1953 (has links)
No description available.
55

Structure and properties of melt spun poly(4-methyl-1-pentene) fibers

Reddy, Srinath 12 1900 (has links)
No description available.
56

Physical characterization of meltblown fibers

Perkins, Cheryl Anne 12 1900 (has links)
No description available.
57

NMR of liquid crystals

Furby, Michael Ian Charles January 1998 (has links)
No description available.
58

The evolution of microfibre through technology and market pressure

Lindsay, Amanda U. January 1999 (has links)
No description available.
59

Textile production in prehistoric and early medieval Ireland

Fitzgerald, Maria Amelia January 2000 (has links)
No description available.
60

Developing a magnetically suspended disc system for industrial applications, with application on ring spinning

Abuelenin, Sherif Mohamed. Abdel-Hady, Faissal. January 2005 (has links) (PDF)
Dissertation (Ph.D.)--Auburn University, 2005. / Abstract. Vita. Includes bibliographic references.

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