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Evaluation of the physical property evolution of the hybrid acrylate/epoxide photopolymerization system.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
書名/作者:	Evaluation of the physical property evolution of the hybrid acrylate/epoxide photopolymerization system.
作者:	Magwood, Leroy, Jr.
面頁冊數:	192 p.
附註:	Source: Dissertation Abstracts International, Volume: 70-10, Section: B, page: 6405.
Contained By:	Dissertation Abstracts International70-10B.
標題:	Engineering, Chemical.
標題:	Engineering, Materials Science.
ISBN:	9781109457339
摘要、提要註:	Hybrid acrylate/epoxide photopolymerizations offer a number of advantages. Compared to each constituent homopolymerization, the hybrid systems exhibit better processing characteristics, reduced shrinkage, improved physical properties, and lower sensitivity to both oxygen and moisture. However these polymerization systems are not well understood and a systematic investigation of the influence of the photosensitizer, the monomer structure and final polymer morphology on the polymer structure and physical property development has not been previously reported. This thesis provides an improved fundamental understanding of the relationship between the polymer structure and physical property development for a spectrum of hybrid polymerizations systems of differing molecular architectures. Four representative classes of hybrid systems are examined: Case 1: A linear acrylate polymerization followed by a crosslinking cationic polymerization; Case 2: A linear acrylate capable of adding into a crosslinked epoxide; Case 3: A single monomer bearing both the acrylate and the epoxide functionality which is capable of covalent bonding into the epoxide network; Case 4: A crosslinking acrylate followed by a crosslinking epoxide. Starting the polymerization process with a linear free radical polymerization (cases 1, 2, and 3) allows shrinkage to occur without stress development (since the system can flow to alleviate the stress) and may be used to produce a stage-curable system in which reaction system moves from a liquid monomer state, to a moldable putty state before finally becoming a rigid polymer.
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3383158

Evaluation of the physical property evolution of the hybrid acrylate/epoxide photopolymerization system.
Magwood, Leroy, Jr.

Evaluation of the physical property evolution of the hybrid acrylate/epoxide photopolymerization system. - 192 p.

Source: Dissertation Abstracts International, Volume: 70-10, Section: B, page: 6405.

Thesis (Ph.D.)--The University of Iowa, 2009.

Hybrid acrylate/epoxide photopolymerizations offer a number of advantages. Compared to each constituent homopolymerization, the hybrid systems exhibit better processing characteristics, reduced shrinkage, improved physical properties, and lower sensitivity to both oxygen and moisture. However these polymerization systems are not well understood and a systematic investigation of the influence of the photosensitizer, the monomer structure and final polymer morphology on the polymer structure and physical property development has not been previously reported. This thesis provides an improved fundamental understanding of the relationship between the polymer structure and physical property development for a spectrum of hybrid polymerizations systems of differing molecular architectures. Four representative classes of hybrid systems are examined: Case 1: A linear acrylate polymerization followed by a crosslinking cationic polymerization; Case 2: A linear acrylate capable of adding into a crosslinked epoxide; Case 3: A single monomer bearing both the acrylate and the epoxide functionality which is capable of covalent bonding into the epoxide network; Case 4: A crosslinking acrylate followed by a crosslinking epoxide. Starting the polymerization process with a linear free radical polymerization (cases 1, 2, and 3) allows shrinkage to occur without stress development (since the system can flow to alleviate the stress) and may be used to produce a stage-curable system in which reaction system moves from a liquid monomer state, to a moldable putty state before finally becoming a rigid polymer.

ISBN: 9781109457339Subjects--Topical Terms:

423048
Engineering, Chemical.

Evaluation of the physical property evolution of the hybrid acrylate/epoxide photopolymerization system.
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245 1 0 $a Evaluation of the physical property evolution of the hybrid acrylate/epoxide photopolymerization system.
300 $a 192 p.
500 $a Source: Dissertation Abstracts International, Volume: 70-10, Section: B, page: 6405.
500 $a Advisers: Alec B. Scranton; Chris N. Coretsopoulos.
502 $a Thesis (Ph.D.)--The University of Iowa, 2009.
520 $a Hybrid acrylate/epoxide photopolymerizations offer a number of advantages. Compared to each constituent homopolymerization, the hybrid systems exhibit better processing characteristics, reduced shrinkage, improved physical properties, and lower sensitivity to both oxygen and moisture. However these polymerization systems are not well understood and a systematic investigation of the influence of the photosensitizer, the monomer structure and final polymer morphology on the polymer structure and physical property development has not been previously reported. This thesis provides an improved fundamental understanding of the relationship between the polymer structure and physical property development for a spectrum of hybrid polymerizations systems of differing molecular architectures. Four representative classes of hybrid systems are examined: Case 1: A linear acrylate polymerization followed by a crosslinking cationic polymerization; Case 2: A linear acrylate capable of adding into a crosslinked epoxide; Case 3: A single monomer bearing both the acrylate and the epoxide functionality which is capable of covalent bonding into the epoxide network; Case 4: A crosslinking acrylate followed by a crosslinking epoxide. Starting the polymerization process with a linear free radical polymerization (cases 1, 2, and 3) allows shrinkage to occur without stress development (since the system can flow to alleviate the stress) and may be used to produce a stage-curable system in which reaction system moves from a liquid monomer state, to a moldable putty state before finally becoming a rigid polymer.
520 $a For each type of hybrid photopolymerization system described above, the following studies were performed: the effects of the photoinitiator formulation on the conversion profile of each constituent monomer were characterized using in situ FTIR; profiles of the storage modulus and tan delta were obtained as a function of the temperature at varying compositions using DMA; the polymer morphology was characterized using SEM. In all cases, the free radical polymerization occurred more rapidly than the cationic polymerization, and the relative rates were influenced by the monomer composition and initiator formulation. The mechanical property measurements and microscopy studies revealed that the homogeneity of the final polymer increases with a thermal post cure and with the addition of a photosensitizer for some monomer compositions.
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710 2 $a The University of Iowa. $3 423213
773 0 $t Dissertation Abstracts International $g 70-10B.
790 1 0 $a Scranton, Alec B., $e advisor
790 1 0 $a Coretsopoulos, Chris N., $e advisor
790 $a 0096
791 $a Ph.D.
792 $a 2009
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