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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.
1

Transport of water in ion exchange resin spheres.

Srivastava, Braj Bihari Lal. January 1967 (has links)
No description available.
2

A rheological comparison of three low density polyethylene film resins /

García-Rejón, Andrés. January 1976 (has links)
No description available.
3

Factors influencing the dielectric properties of phenolic resins ...

Debing, Lawrence Melvin, January 1900 (has links)
Thesis (Ph. D.)--Columbia University, 1946. / Vita. Bibliography: p. 61.
4

Investigation of the product formed in the reaction of quinoline hydrocholoride with zinc dust.

Dong, Gordon January 1956 (has links)
A dark red resin was isolated from the reaction mixture obtained by treatment of quinoline hydrochloride with zinc dust. Indications, from chromatographic studies of the resin, that it contained a number of different components led to extensive investigations of methods of separation. Satisfactory separation of the resin into pure components was finally achieved by a scheme which essentially involved fractional extraction and fractional adsorption-desorption. Three pure components were isolated, and characterized by chemical and physical analyses. Two of the components were suggested as heterocyclic compounds of quinoline probably of polymeric nature. The third component appeared to be an aniline type compound resulting from reductive cleavage of quinoline. Ultra-violet spectra of the isolated pure components supported the deductions made from chemical and other physical evidence. / Science, Faculty of / Chemistry, Department of / Graduate
5

A rheological comparison of three low density polyethylene film resins /

García-Rejón, Andrés. January 1976 (has links)
No description available.
6

Transport of water in ion exchange resin spheres.

Srivastava, Braj Bihari Lal. January 1967 (has links)
No description available.
7

Thermal and kinetic characterization of thermosetting resins diving cure

Sourour, Sami January 1978 (has links)
No description available.
8

Comparisons of silica polyamine composites and crosslinked polystyrenes resins

Wood, Jessica Lee. January 2008 (has links)
Thesis (M.S.)--University of Montana, 2008. / Title from title screen. Description based on contents viewed Oct. 3, 2008. Includes bibliographical references (p. 87-90).
9

A synthetic and spectrometric study of the initial phases in urea-formaldehyde resin formation

Nocanda, Xolani Wittleton January 1998 (has links)
In a series ofpreIiminary studies of urea-formaldehyde reactions, the influence of the U:F molar ratio, the temperature and the catalyst were investigated. Subsequently, in a more rigorous evaluation of the influence of four variables on urea-formaldehyde resin formation, viz., U:F molar ratio, pH, temperature and reaction time, a set of twenty reactions were performed using a statistical approach. The results indicate that high resin viscosity is best achieved by using a high U:F molar ratio (1:2) and conducting the reaction at 90°C. Several basic components produced in urea-formaldehyde reactions have been synthesised, characterised by NMR spectroscopy, silylated using bis(trimethylsilyl)trifluoroacetamide and analysed by low resolution mass spectrometry. The use oftriazones as cross-linking agents has been investigated, and a series of 5-substituted triazones have been prepared and their mass fragmentation patterns explored using a combination of low and high resolution mass spectrometry. In order to facilitate interpretation of ¹³C NMR data obtained for U-F resins, internal rotation in various urea derivatives was investigated using variable temperature ¹H and ¹³C NMR spectroscopic study. Signal splittings observed below 247 K have been rationalised in terms of various rotameric structures.
10

Thermal and kinetic characterization of thermosetting resins diving cure

Sourour, Sami January 1978 (has links)
No description available.

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