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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.
21

Influence of intermoluecular entangelments upon the mechanical properties of high polymers

Berge, John Williston, January 1958 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1958. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references: leaves 157-160.
22

Stress transients in shear flow of polymer melts

Hansen, Marion Glenn, January 1974 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1974. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
23

In-line elasticity measurements in polymer melts

De Vargas, Lourdes Angelica Vega Acosta. January 1979 (has links)
Thesis--University of Wisconsin--Madison. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 191-194).
24

Configurations of macromolecules in dilute solutions undergoing flow

Saab, Hassane H. January 1984 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1984. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 106-109).
25

The production of electrically conductive polymeric fibers using electroless deposition techniques

Sircar, Anita Marie. January 1900 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1984. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 90-94).
26

The cross-linking of linear polymers in solution

Fordyce, David Buchanan, January 1950 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1950. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves [159]-160).
27

Synthesis and properties of conjugated hyperbranched polymers /

Haeussler, Matthias. January 2006 (has links)
Thesis (Ph.D.)--Hong Kong University of Science and Technology, 2006. / Includes bibliographical references. Also available in electronic version.
28

Cinnamated PDMS Polymerization for MEMS Applications

Chen, Jianxin January 2008 (has links) (PDF)
No description available.
29

Palladium-catalyzed alternating copolymerization of carbon monoxide with olefin

Zhao, Allen X 01 January 1992 (has links)
The alternating copolymerization of carbon monoxide with olefin is one of the very new field in the polymer chemistry. The ultimate goal of the dissertation work is to gain a broad knowledge about this polymerization reaction as well as the properties of the alternating copolymers. The alternating copolymerization of carbon monoxide with ethylene was systematic investigated using the catalyst system of (Pd(CH$\sb3$CN)$\sb4$) (BF$\sb4)\sb2$/phosphine complexes. Palladium bisphosphine complex has been found to be far more active and more stable than the monodente phosphine Pd catalyst. Methanol is a co-initiator as well as a chain transfer agent. Protonic acid enhances the rate of copolymerization but causes chain transfer. In the absence of methanol, the copolymerization was characterized by long induction period and slow rate. The end groups of alternating copolymers were isotope labeled (using radioactive isotope labeled methanol or deuterated methanol) and analyzed. The chain transfer reactions are alcoholysis of palladium acyl bond or $\beta$-hydrogen elimination reaction. The overall copolymerization mechanism was discussed. (Pd(CH$\sb3$CN)$\sb4$) (BF$\sb4)\sb2$/bisphosphine catalysts and methanol as co-initiator were found to be very active for the alternating copolymerization of carbon monoxide with propylene, 1-butene and 1-hexene. The palladium catalyst with bis(diphenylphosphino)propane shows higher activity but moderate regioselectivity. The catalyst with (-)DIOP has better regioselectivity and produces semi-crystalline CO/propylene alternating copolymer. The thermodegradation of alternating copolymer of carbon monoxide with ethylene was also studied using pyrolysis GC-Mass spectroscopy. Carbon monoxide, ethylene, water and oligomers of ketones were identified as volatile products during the thermodegradation.
30

Preparation of functional biodegradable polymers

Yang, John Po-Wen 01 January 1993 (has links)
The preparation of a variety of lactone and olefin homopolymers and their copolymers using alkyl aluminoxanes and soluble Ziegler-Natta catalysts was studied. After investigation of a variety of soluble Ziegler-Natta cocatalyst and alkyl-aluminoxanes, either bis(cyclopentadienyl)zirconium dichloride, Cp$\sb2$ZrCl$\sb2$, or ethylene bis(tetrahydroindenyl)zirconium dichloride, Et(ThInd)$\sb2$ZrCl$\sb2$, with isobutylaluminoxane, IBAO, were found to be very effective for the copolymerizations, so these catalyst systems were used throughout this thesis research program. In order to vary the type of functionality and biodegradability, the possible copolymerization of lactones (including $\beta$-butyrolactone ($\beta$-BL), $\varepsilon$-caprolactone (CL), $\gamma$-butyrolactone ($\gamma$-BL), and DL-lactide (DL-L)) and olefin containing monomers (including styrene (S), methyl methacrylate (MMA) and ethyl acrylate (EA)) were studied. Many of these copolymers were synthesized for the first time in this study. The characterization results showed that some of these copolymers had high molecular weights, narrow polydispersities, unimodal GPC chromatograms and single values of glass transition temperatures (T$\sb{\rm g}$), and they were also totally amorphous. These results indicate that they were true copolymers.

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