التفاصيل البيبلوغرافية
| العنوان: |
Preparation and Curing Behavior Study of Primary Amine-functional Benzoxazine/Epoxy Copolymer. |
| المؤلفون: |
ZUWEI ZHU1, ZIHAO ZHANG2, YUE SITU1 situyue@scut.edu.cn, HONG HUANG1 |
| المصدر: |
Journal of Polymer Materials. Oct-Dec2014, Vol. 31 Issue 4, p477-489. 13p. |
| مصطلحات موضوعية: |
*BENZOXAZINES, *EPOXY resins, *COPOLYMERS, *CURING, *POLYMERIZATION, *DIFFERENTIAL scanning calorimetry |
| مستخلص: |
A novel thermosetting resin, primary amine-functional benzoxazine/epoxy copolymer (BEC), was synthesized by thermal polymerization. The structure and curing behaviors of BEC were characterized by Fourier transform infrared spectra and differential scanning calorimetry (DSC). During curing, two-step successive reactions, including addition reaction between primary amine with epoxy group and ring-opening reaction of oxazine group, occurred and led to the formation of binary crosslinking copolymer. The ring-opening reaction of oxazine ring is catalyzed by amine group and simultaneously follows autocatalytic mechanism ascribed to the generation of hydroxyl groups. The kinetic parameters of ring-opening reaction of oxazine ring were evaluated by Nonisothermal dynamic analysis using Kissinger, Ozawa, crane and Kissinger-Akahira-Sunose (KAS) methods. The value of Ea increased with the increase of curing degree, indicating an apparent diffusion control due to the lowering of molecular mobility in curing process. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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