Author: Clement Nnamdi OnyenemezuPublisher:
ISBN:
Category :
Languages : en
Pages : 624
Book Description
Preparation, Characterization and Diffusion Studies of Emulsifier-free Polymer Latexes
Author: Clement Nnamdi OnyenemezuPublisher:
ISBN:
Category :
Languages : en
Pages : 624
Book Description
Polymer Latexes
Author: Eric S. DanielsPublisher:
ISBN:
Category : Acrylonitrile
Languages : en
Pages : 480
Book Description
Synthesis, Characterization, and Polymer Diffusion Studies of Poly(vinyl Acetate) Copolymer Latexes [microform]
![Synthesis, Characterization, and Polymer Diffusion Studies of Poly(vinyl Acetate) Copolymer Latexes [microform] PDF](https://books.google.com/books/content/images/frontcover/n2gUAAAACAAJ?fife=w80-h100)
Author: Jun WuPublisher: Library and Archives Canada = Bibliothèque et Archives Canada
ISBN: 9780612942646
Category :
Languages : en
Pages : 316
Book Description
In the second part of this thesis, I describe the influence of a water-soluble polymer (PVOH) on rates of polymer diffusion. In the presence of 2 to 17 wt% PVOH, the polymer diffusion rates in P(MMA-co-BA) latex films were retarded. The magnitude of the effect increased with the amount of PVOH present, and the effect was larger at 45°C than at 63°C. I show that the PVOH has its largest influence at the very early stages of polymer diffusion. The presence of post-added PVOH also retarded the polymer diffusion in the M250k P(VAc-DBM) latex films, while the presence of grafted PVOH significantly promoted the polymer diffusion rate and this effect increased with an increase of the degree of PVOH grafting. In the first part of this thesis, I describe polymer diffusion in films prepared from poly(vinyl acetate-co-dibutyl maleate) [P(VAc-DBM)] latex dispersions. Two sets of polymers were investigated, one set containing 50% gel (high-M), the other set, with Mw & ap; 250,000 (M250K), free of a measurable gel content. Polymer diffusion was monitored with fluorescence resonance energy transfer (ET) technique and apparent diffusion coefficients (D app) were calculated. These values increased with temperature, and were characterized by apparent activation energy (Ea) of 37 kcal/mol for the high-M polymer and 45 kcal/mol for the M250K sample. The difference in E a values for the polymer diffusion can be ascribed to changes in the microscopic friction coefficient zeta0 and the differences in Tg of the two sets of samples. Another finding is that the polymer diffusion rate depends primarily on the molecular weight and degree of branching of the diffusing species and is much less sensitive to the cross-linked nature of the matrix present in one of the samples. Finally, I describe the synthesis of dye-labeled poly(vinyl acetate- co-ethylene) (EVA) latexes for ET experiments. I show that polymer diffusion in these EVA latex films was so rapid that mixing was complete by the time when the film was dry. I attribute this to a low T g of the EVA and low monomeric friction coefficient zeta0 at temperatures close to its Tg.
Polymer Latex Particles - Preparation, Characterization, and Coating Patterns
Author: Leeyih WangThe Preparation and Characterization of Synthetic Latexes
Author: Mohamed E. LabibPublisher:
ISBN:
Category : Latex
Languages : en
Pages : 366
Book Description
Polymer Latexes - Preparation, Characterization, and Applications , Developed from a symposium sponsored by the Division of Polymeric Materials Science and Engineering and the Division of Colloid and Surface Chemistry at the 201st National Meeting of the American Chemical Society, Atlanta, GA, April 14 - 19 1991
Author: Daniels ES EdDissertation Abstracts International
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 846
Book Description
Hybrid Latex Particles
Author: Alex M. van HerkPublisher: Springer
ISBN: 9783642265457
Category : Technology & Engineering
Languages : en
Pages : 288
Book Description
Historical Overview of (Mini)emulsion Polymerizations and Preparation of Hybrid Latex Particles, by A.M. van Herk; * Physical Methods for the Preparation of Hybrid Nanocomposite Polymer Latex Particles, by R. F.A. Teixeira and S. A.F. Bon; * Organic/Inorganic Composite Latexes: The Marriage of Emulsion Polymerization and Inorganic Chemistry, by Elodie Bourgeat-Lami and Muriel Lansalot; * Preparation of Hybrid Latex Particles and Core–Shell Particles Through the Use of Controlled Radical Polymerization Techniques in Aqueous Media, by Bernadette Charleux, Franck D’Agosto, and Guillaume Delaittre; * Miniemulsion Polymerization as a Means to Encapsulate Organic and Inorganic Materials, by Clemens K.Weiss and Katharina Landfester; * Organic–Inorganic Hybrid Magnetic Latex, by Md Mahbubor Rahman and Abdelhamid Elaissari
Graduate School Commencement
Author: University of Minnesota. Graduate SchoolPublisher:
ISBN:
Category :
Languages : en
Pages : 104
Book Description
Emulsifier-free Polymer Latexes
Author: Clement Nnamdi OnyenemezuPublisher:
ISBN:
Category : Emulsion polymerization
Languages : en
Pages : 222
Book Description