二元胺POSS的合成及其对聚酰亚胺材料的改性研究

以PTES和APS为硅源,在TEAOH的催化作用下采用水解共缩合法合成了二元胺POSS,经FTIR、1H-NMR,13C-NMR,29Si-NMR测试表明,产物具有设计的理想结构。将合成的二元胺POSS与ODA一并与PMDA反应得到二元胺POSS修饰的聚酰胺酸,经热酰亚胺化后得到了一系列不同二元胺POSS含量的聚酰亚胺杂化薄膜。利用TGA、微机控制拉力试验机、等离子体原子氧产生装置分别对杂化薄膜的热性能、力学性能、抗原子氧侵蚀性能进行了研究。结果表明,杂化薄膜耐热性良好,但力学性能有所降低,当二元胺POSS的摩尔百分含量达到7%时,杂化薄膜的抗原子氧性能提高了将近4倍。...

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Published in航空材料学报 Vol. 33; no. 1; pp. 61 - 67
Main Author 雷星锋 张秋禹 孙九立 张宝亮 陈少杰 范新龙 厉向杰
Format Journal Article
LanguageChinese
Published 西北工业大学理学院应用化学系,西安,710129 2013
Subjects
APS
PTES
二元胺POSS
抗原子氧
水解共缩合
聚酰亚胺
抗原子氧
聚酰亚胺
APS
二元胺POSS
PTES
水解共缩合
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ISSN1005-5053
DOI10.3969/j.issn.1005-5053.2013.1.011

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Summary:以PTES和APS为硅源,在TEAOH的催化作用下采用水解共缩合法合成了二元胺POSS,经FTIR、1H-NMR,13C-NMR,29Si-NMR测试表明,产物具有设计的理想结构。将合成的二元胺POSS与ODA一并与PMDA反应得到二元胺POSS修饰的聚酰胺酸,经热酰亚胺化后得到了一系列不同二元胺POSS含量的聚酰亚胺杂化薄膜。利用TGA、微机控制拉力试验机、等离子体原子氧产生装置分别对杂化薄膜的热性能、力学性能、抗原子氧侵蚀性能进行了研究。结果表明,杂化薄膜耐热性良好,但力学性能有所降低,当二元胺POSS的摩尔百分含量达到7%时,杂化薄膜的抗原子氧性能提高了将近4倍。
Bibliography:In this paper, γ-aminopropyltriethoxysilanes （APS） and penyltriethoxysilanes （PTES） were adopted to prepare bifunctionalized amino POSS, namely POSS-diamine, via hydrolytic co-condensation in ethanol/H2O solvent under the catalysis of TEAOH. The structure of the product was characterized by FTIR, 1H-NMR, 13C-NMR and 29Si-NMR, which revealed that the structure of the product was ideal. POSS-diamine and ODA were used to react with PMDA to prepare POSS modified polyamic acid. After thermal imidization process, a series of polyimide hybrid films with different POSS-diamine content were obtained. The thermostability, mechanical properties and atomic oxygen corrosion resistance property of hybrid films were measured by TGA, tensile testing machine and plasma atomic oxygen producer. Results indicated that thermal property of these hybrid films was still excellent, while mechanical performance slightly decreased. The atomic oxygen resistance property was improved nearly four times when POSS-diamine addition reached 7
ISSN:1005-5053
DOI:10.3969/j.issn.1005-5053.2013.1.011