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Impact of monomer structure and term...
~
Berchtold, Kathryn Ann.
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Impact of monomer structure and termination kinetics on free radical photopolymerizations.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Impact of monomer structure and termination kinetics on free radical photopolymerizations./
作者:
Berchtold, Kathryn Ann.
面頁冊數:
486 p.
附註:
Source: Dissertation Abstracts International, Volume: 62-11, Section: B, page: 5146.
Contained By:
Dissertation Abstracts International62-11B.
標題:
Chemistry, Polymer. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3034288
ISBN:
0493466967
Impact of monomer structure and termination kinetics on free radical photopolymerizations.
Berchtold, Kathryn Ann.
Impact of monomer structure and termination kinetics on free radical photopolymerizations.
- 486 p.
Source: Dissertation Abstracts International, Volume: 62-11, Section: B, page: 5146.
Thesis (Ph.D.)--University of Colorado at Boulder, 2001.
Crosslinking free radical photopolymerizations are complex reactions. Their reaction conditions and numerous advantageous characteristics make them desirable for many applications including coatings, biomaterials, microelectronics, adhesives, and photolithography. However, much of what has been achieved with photopolymerization was accomplished with minimal understanding of the fundamental kinetics of the photopolymerization process. With a better understanding of this complex process, the use of this powerful technology will be expanded dramatically.
ISBN: 0493466967Subjects--Topical Terms:
1018428
Chemistry, Polymer.
Impact of monomer structure and termination kinetics on free radical photopolymerizations.
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Source: Dissertation Abstracts International, Volume: 62-11, Section: B, page: 5146.
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Thesis (Ph.D.)--University of Colorado at Boulder, 2001.
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Crosslinking free radical photopolymerizations are complex reactions. Their reaction conditions and numerous advantageous characteristics make them desirable for many applications including coatings, biomaterials, microelectronics, adhesives, and photolithography. However, much of what has been achieved with photopolymerization was accomplished with minimal understanding of the fundamental kinetics of the photopolymerization process. With a better understanding of this complex process, the use of this powerful technology will be expanded dramatically.
520
$a
This work develops a more complete understanding of photopolymerizations and the factors that impact their kinetics most significantly. The emphasis is on termination, and how the mechanisms and kinetics of the termination reaction are influenced by polymerization conditions and monomer chemistry. These effects are scrutinized via examination of commercially available monomers and monomers that are designed and synthesized specifically for evaluating the impact of monomer structure and functionality on polymerization characteristics. Real-time Fourier transform infrared spectroscopy, both in the near and mid-infrared regions, electron paramagnetic resonance spectroscopy, and dynamic mechanical analysis are the primary experimental techniques developed utilized as tools for materials and polymerization characterization.
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Chain length dependent termination (CLDT) is recognized as an important phenomenon in linearly polymerizing systems. However, its relevance in crosslinking polymerizations has not received significant attention. Polymerizations that form glassy, rubbery, and highly and loosely crosslinked networks are examined, and the effect of kinetic chain length variations on their steady state and unsteady state kinetics are evaluated. Changes observed experimentally and via the incorporation of CLDT into a kinetic model illustrate the importance of CLDT in crosslinking polymerizations.
520
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The effects of monomer structure and functionality on the photopolymerization kinetics and polymer network characteristics are also investigated utilizing a number of monovinyl monomers that incorporate various secondary, non-vinyl functionalities and end group substituents. The three factors hypothesized as important to the advantageous polymerization characteristics observed are hydrogen bonding, hydrogen abstraction, and the electronic characteristics of the monomer. The experimental evaluations presented clearly demonstrate that each of these mechanisms contributes to the reactivity of these monomers and the networks that they form. The combination of these leads to crosslinked network formation and enhanced polymerization kinetics, rivaling those of multivinyl systems.
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http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3034288
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