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Photopolymerizations of multifunctio...

Anseth, Kristi Sue.

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Photopolymerizations of multifunctional monomers: Reaction mechanisms and polymer structural evolution.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Photopolymerizations of multifunctional monomers: Reaction mechanisms and polymer structural evolution./
作者:	Anseth, Kristi Sue.
面頁冊數:	381 p.
附註:	Source: Dissertation Abstracts International, Volume: 56-03, Section: B, page: 1566.
Contained By:	Dissertation Abstracts International56-03B.
標題:	Engineering, Chemical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9524280

Photopolymerizations of multifunctional monomers: Reaction mechanisms and polymer structural evolution.
Anseth, Kristi Sue.

Photopolymerizations of multifunctional monomers: Reaction mechanisms and polymer structural evolution. - 381 p.

Source: Dissertation Abstracts International, Volume: 56-03, Section: B, page: 1566.

Thesis (Ph.D.)--University of Colorado at Boulder, 1994.

Photopolymerizations of multifunctional monomers provide an excellent method for the fast curing of liquid monomers at room temperature into highly crosslinked, glassy polymer networks. The high crosslinking density of the polymer combined with the rapid curing rate and spatial control of the photopolymerization has led to a wide array of applications. However, the polymerization behavior and the structure of the resulting polymer network are extremely complex and difficult to characterize. The reaction kinetics and mechanisms of multifunctional monomer polymerizations were investigated with differential scanning calorimetry and infrared spectroscopy. In particular, reaction diffusion controlled termination was examined and quantified in terms of a reaction diffusion constant. The influence of reaction temperature, solvent concentration, and monomer type and functionality on the reaction diffusion parameter was also investigated.Subjects--Topical Terms:

1018531
Engineering, Chemical.

Photopolymerizations of multifunctional monomers: Reaction mechanisms and polymer structural evolution.
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100 1 $a Anseth, Kristi Sue. $3 1904969
245 1 0 $a Photopolymerizations of multifunctional monomers: Reaction mechanisms and polymer structural evolution.
300 $a 381 p.
500 $a Source: Dissertation Abstracts International, Volume: 56-03, Section: B, page: 1566.
500 $a Major Professor: Christopher N. Bowman.
502 $a Thesis (Ph.D.)--University of Colorado at Boulder, 1994.
520 $a Photopolymerizations of multifunctional monomers provide an excellent method for the fast curing of liquid monomers at room temperature into highly crosslinked, glassy polymer networks. The high crosslinking density of the polymer combined with the rapid curing rate and spatial control of the photopolymerization has led to a wide array of applications. However, the polymerization behavior and the structure of the resulting polymer network are extremely complex and difficult to characterize. The reaction kinetics and mechanisms of multifunctional monomer polymerizations were investigated with differential scanning calorimetry and infrared spectroscopy. In particular, reaction diffusion controlled termination was examined and quantified in terms of a reaction diffusion constant. The influence of reaction temperature, solvent concentration, and monomer type and functionality on the reaction diffusion parameter was also investigated.
520 $a In addition to these kinetic studies, several structural features of the polymer network and its evolution were characterized. In this regard, a photochromic technique was developed to measure the free volume distribution throughout the polymerization. With this technique, the presence of microgels at the early stage of the polymerization was clearly identified, and the influence of the polymerization rate or volume relaxation on the system's free volume was characterized. Electron spin resonance spectroscopy was also used to determine the concentration and environment of radicals during the polymerization. Radial species were identified as trapped or free, and the importance of radical trapping as a unimolecular termination mechanism was quantified.
520 $a Finally, the polymerization reaction and the structural evolution of the network were modeled using two different approaches. A kinetic model was developed to predict the effects of reaction conditions on the polymerization kinetics and the maximum attainable double bond conversion. A kinetic gelation model was modified to predict features of the polymer structural evolution such as crosslinking versus cyclization tendencies, relative reactivity of pendant functional groups, trapped radical fractions, and species aggregation.
590 $a School code: 0051.
650 4 $a Engineering, Chemical. $3 1018531
650 4 $a Engineering, Materials Science. $3 1017759
650 4 $a Chemistry, Polymer. $3 1018428
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710 2 0 $a University of Colorado at Boulder. $3 1019435
773 0 $t Dissertation Abstracts International $g 56-03B.
790 1 0 $a Bowman, Christopher N., $e advisor
790 $a 0051
791 $a Ph.D.
792 $a 1994
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9524280