教師資料查詢 | 類別: 期刊論文 | 教師: 董崇民 Don, Trong-ming (瀏覽個人網頁)

標題:Fourier transform infrared analysis of polycarbonate/epoxy mixtures cured with an aromatic amine
學年87
學期1
出版(發表)日期1998/09/01
作品名稱Fourier transform infrared analysis of polycarbonate/epoxy mixtures cured with an aromatic amine
作品名稱(其他語言)
著者董崇民; Don, Trong-ming
單位淡江大學化學工程與材料工程學系
出版者
著錄名稱、卷期、頁數Journal of applied polymer science 69(12), pp.2395-2407
摘要In our previous article, we established that polycarbonate (PC) can react with the diglycidyl ether of bisphenol-A (DGEBA) at 200°C through transesterification and addition reactions, resulting in degraded PC chains with phenolic end groups and also in PC/DGEBA copolymers. However, these reactions can be minimized or eliminated at lower temperatures, below 160°C. In this article, Fourier transform infrared analysis (FTIR) was used to study the curing kinetics of epoxies in the presence of PC. The curing agent was an aromatic amine, diaminodiphenyl methane (DDM). FTIR results showed that the presence of a small amount of PC promoted the amine–epoxide reactions, probably due to the catalytic effect of the phenolic end groups in the PC chains. However, the PC did not alter the epoxy cure reaction mechanism. Two different blending processes were used to premix the PC and DGEBA, namely, solution-blending and melt-blending processes, in order to give different extents of prereactions. If a solution-blending process was used, PC tended to undergo crystallization during an early stage of cure. When a melt-blending process was used, no melting peak was observed in the thermograms of the differential scanning calorimeter (DSC) for the modified epoxies; PC chains bonded to DGEBA during prereaction at 200°C, thus inhibiting the crystallization of PC during cure.
關鍵字
語言英文(美國)
ISSN0021-8995;1097-4628
期刊性質國外
收錄於
產學合作
通訊作者
審稿制度
國別美國
公開徵稿
出版型式,電子版,紙本
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