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含能材料  2014 

一种五元环硼酸酯键合剂的合成及其水解反应动力学

DOI: 10.3969/j.issn.1006-9941.2014.01.001

Keywords: 物理化学,五元环硼酸酯,键合剂,在线红外,水解反应动力学

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Abstract:

采用硼酸、乙二醇及1,2,4-丁三醇为原料,一锅法合成了一种含有五元环的硼酸酯键合剂,采用FTIR、11BNMR、1HNMR和MS对其结构进行了表征。用在线红外分析手段研究了合成的硼酸酯化合物在常温水中和饱和水蒸气中的水解反应动力学。建立了水解反应动力学模型。结果表明,上述两种条件下硼酸酯水解反应为准一级反应。硼酸酯在常温水中的反应速率常数为2.3×10-5s-1,半衰期约为8.4h。硼酸酯在饱和水蒸气中的反应速率常数为2.96×10-7s-1,半衰期约为27天。添加0.2%的硼酸酯使RDX/HTPB炸药的抗拉强度从0.80MPa提高至1.44MPa,抗压强度从5.04MPa提高至13.27MPa,证明其键合效果良好。

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