Investigation of curing characterization of acetylene-terminated polyisoimide oligomer

被引：0

作者：

Li B.-T. ^{[1
]}

Xing L.-Y. ^{[1
]}

Zhao T. ^{[2
]}

Liu F. ^{[2
]}

Chen X.-B. ^{[1
]}

机构：

[1] Beijing Institutes of Aeronautical Materials

[2] Institute of Chemistry Chinese Academy of Sciences

来源：

Hangkong Cailiao Xuebao/Journal of Aeronautical Materials | 2011年 / 31卷 / 02期

关键词：

Acetylene-terminated polyisoimide oligomer; Activation energies; Crosslinking; Isomerization;

D O I：

10.3969/j.issn.1005-5053.2011.2.008

中图分类号：

学科分类号：

摘要：

The curing of acetylene-terminated polyisoimide oligomer was investigated using DSC and FTIR spectroscopy. Through dynamic and isothermal FTIR method, the isoimide-imide isomerization and crosslinking reactions of the oligomer was monitored individually and the temperature ranges of these two reactions were clearly determined. The fact that the isomerization occurred at a lower temperature ranges than the crosslinking is attributed to the difference between the activation energies of the two reactions, 79.635 kJ/mol for isomerization and 106.469 kJ/mol for crosslinking. For the acetylene-terminated polyisoimide oligomer considered here, curing reaction was achieved to a sufficient extent at the temperature range of 200~220°C. Posture temperature is in the range of 300~350°C.

引用

页码：37 / 42

页数：5

共 8 条

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