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dc.contributor.authorLin, MLen_US
dc.contributor.authorChang, KHen_US
dc.contributor.authorChang, FCen_US
dc.contributor.authorLi, MSen_US
dc.contributor.authorMa, CCMen_US
dc.date.accessioned2014-12-08T15:01:27Z-
dc.date.available2014-12-08T15:01:27Z-
dc.date.issued1997-09-30en_US
dc.identifier.issn0887-6266en_US
dc.identifier.urihttp://hdl.handle.net/11536/299-
dc.description.abstractReaction mechanism of the PC-epoxy blends cured by aliphatic amine has been investigated by varying PC contents in the blends. The transamidation reaction tends to convert nearly all the carbonates into N-aliphatic aromatic carbamates even at ambient temperature before normal curing. The remaining amine proceeds the normal curing with epoxy at a higher temperature (80 degrees C). For the PC-epoxy/aliphatic amine blend containing 6 wt % PC, the yielded N-aliphatic aromatic carbamate further reacts with amine to produce the urea structure. The urea undergoes substitution reaction with the hydroxyl formed from the normal curing to give the N-aliphatic aliphatic carbamate. For the blend containing 12 wt % PC, the N-aliphatic aromatic carbamate converts into the N-aliphatic aliphatic carbamate via two different routes. For the blend containing lower molecular weight of the aliphatic amine, the N-aliphatic aromatic carbamate reacts with hydroxyl to form the N-aliphatic aliphatic carbamate directly. For the blend containing higher molecular weight of aliphatic amine, the N-aliphatic aromatic carbamate decomposes into the aliphatic isocyanate accelerated by the presence of the residual oxirane. The isocyanate formed then reacts with hydroxyl to yield the N-aliphatic aliphatic carbamate. The activation energy (E-alpha) and preexponential factor (A) of the PC-epoxy/POPDA blends decrease with the increase of the PC content. Kinetic study by thermal analysis by the method of autocatalyzed model is able to correctly predict oxirane conversion vs. time relationship for the neat epoxy/aliphatic amine and the PC-epoxy/aromatic amine systems because the dominant reaction is the normal curing reaction between amine and oxirane. The model fails to predict the PC-epoxy/aliphatic amine system because the system is complicated by several other reactions besides the normal curing reaction. (C) 1997 John Wiley & Sons, Inc.en_US
dc.language.isoen_USen_US
dc.subjectepoxyen_US
dc.subjectblenden_US
dc.subjectpolycarbonateen_US
dc.subjecttransesterificationen_US
dc.subjecttransamidationen_US
dc.subjectcarbamateen_US
dc.titleThe epoxy-polycarbonate blends cured with aliphatic amine .1. Mechanism and kineticsen_US
dc.typeArticleen_US
dc.identifier.journalJOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICSen_US
dc.citation.volume35en_US
dc.citation.issue13en_US
dc.citation.spage2169en_US
dc.citation.epage2181en_US
dc.contributor.department應用化學系zh_TW
dc.contributor.departmentDepartment of Applied Chemistryen_US
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