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Studies on polycarbonate-modified ep...

Don, Trong-Ming.

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Studies on polycarbonate-modified epoxies.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Studies on polycarbonate-modified epoxies./
作者:	Don, Trong-Ming.
面頁冊數:	286 p.
附註:	Source: Dissertation Abstracts International, Volume: 57-09, Section: B, page: 5896.
Contained By:	Dissertation Abstracts International57-09B.
標題:	Chemistry, Polymer. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9703687
ISBN:	9780591102567

Studies on polycarbonate-modified epoxies.
Don, Trong-Ming.

Studies on polycarbonate-modified epoxies. - 286 p.

Source: Dissertation Abstracts International, Volume: 57-09, Section: B, page: 5896.

Thesis (Ph.D.)--University of Connecticut, 1996.

A typical epoxy resin based upon the diglycidyl ether of bisphenol-A (DGEBA) was modified with polycarbonate (PC). Prior to aromatic amine cure with diaminodiphenyl methane (DDM), the possible uncatalyzed reactions in the PC/DGEBA blends were investigated. It was shown that at 200

ISBN: 9780591102567Subjects--Topical Terms:

1018428
Chemistry, Polymer.

Studies on polycarbonate-modified epoxies.
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245 1 0 $a Studies on polycarbonate-modified epoxies.
300 $a 286 p.
500 $a Source: Dissertation Abstracts International, Volume: 57-09, Section: B, page: 5896.
502 $a Thesis (Ph.D.)--University of Connecticut, 1996.
520 $a A typical epoxy resin based upon the diglycidyl ether of bisphenol-A (DGEBA) was modified with polycarbonate (PC). Prior to aromatic amine cure with diaminodiphenyl methane (DDM), the possible uncatalyzed reactions in the PC/DGEBA blends were investigated. It was shown that at 200 $\ sp\circ $\ sp\circ
520 $a Antiplasticization behavior was found in the polycaprolactone (PCL)/PC-modified epoxy system, cured with DDM. The initial modulus increased and the fracture toughness and the elongation at break decreased with the addition of the PCL/PC (1/10) modifier up to 15 phr. The glass transition temperature (Tg) slightly decreased. The antiplasticization phenomenon can be explained by the formation of hydrogen bonding between the carbonyl groups in the PCL/PC and the hydroxyl groups in the epoxy. The hydrogen bonding proportion, as analyzed from Fourier transform infrared spectra, increased with the addition of PCL/PC (1/10) up to 15 phr. It is suggested that for antiplasticization to occur within the miscibility range, a strong molecular interaction is necessary to restrict molecular motion, and in turn to decrease the free volume. Dynamic mechanical analysis revealed an increase in the activation energy and a decrease in the peak area for the $\ beta $ relaxation process, which also can be explained by the hydrogen bonding. The results indirectly support the hypothesis that the motion of the 2-hydroxypropyl ether moiety is responsible for the $\ beta $ relaxation process.
590 $a School code: 0056.
650 4 $a Chemistry, Polymer. $3 1018428
650 4 $a Engineering, Materials Science. $3 1017759
650 4 $a Plastics Technology. $3 1023683
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710 2 $a University of Connecticut. $3 1017435
773 0 $t Dissertation Abstracts International $g 57-09B.
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