点击次数：

论文类型：期刊论文

发表时间：2015-01-01

发表刊物：RSC ADVANCES

收录刊物：SCIE、EI、Scopus

卷号：5

期号：112

页面范围：92055-92060

ISSN号：2046-2069

摘要：A mixture of ammonium molybdate tetrahydrate and urea (AMTU) was developed successfully to catalyze phthalonitrile to afford 2,4,6-tris(2-cyanophenyl)-1,3,5-triazine. Then AMTU was employed as a curing agent to promote the curing reaction of phthalonitrile-terminated poly(phthalazinone ether nitrile) (PPEN-Ph), and the effect of the novel curing agent was studied by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The initial curing temperature and apparent activation energy Ea (based on the Kissinger equation) were reduced from 268.5 degrees C and 201.5 kJ mol(-1) using the common curing agent ZnCl2, to 223.0 degrees C and 78.4 kJ mol(-1) using AMTU, respectively, under identical curing conditions. Moreover, the resulting thermosetting resin over AMTU showed excellent thermal stability; the T-d5% and T-d10% were 487 degrees C and 540 degrees C, respectively, and the char residue was up to 75% at 800 degrees C. These results indicated that AMTU could reduce the curing temperature for PPEN-Ph effectively, and it may be a good candidate as a curing agent for phthalonitrile resins.