Htpb聚氨酯粘接界面不饱和双键化学变化的表征方法

Characterization method for chemical changes of HTPB (hydroxyl-terminated polybutadiene) polyurethane adhesive interface unsaturated double bonds

Abstract

本发明公开一种HTPB聚氨酯粘接界面不饱和双键化学变化的表征方法,包括:S1、获取一块含粘接界面和界面两侧物质的HTPB聚氨酯样品,用石蜡封装,沿平行于界面方向,从表面向内部切片;S2、去除切片上石蜡,将切好的样品剪碎后与光谱纯KBr研磨混合,测试透射红外光谱;S3、对红外光谱中官能团特征吸收峰和内标峰峰面积积分,根据峰面积或峰强的变化得到不同位置的不饱和双键在不同时间的含量变化。通过上述方法研究官能团含量随切片位置和老化时间的变化规律,分析HTPB聚氨酯粘接界面各官能团的老化反应及老化程度。该方法简单有效,对于准确预估材料的使用和贮存期限,解释界面材料发生变化的机理具有积极意义。
The invention discloses a characterization method for chemical changes of HTPB (hydroxyl-terminated polybutadiene) polyurethane adhesive interface unsaturated double bonds. The characterization method comprises the following steps: S1, using an HTPB polyurethane sample containing an adhesive interface and substances on both sides of the interface, packaging with paraffin, and slicing from the surface to the interior along a direction parallel to the interface; S2, removing the paraffin on slices, shearing the sliced samples, grinding and mixing with spectroscopically pure KBr, and testing transmissible infrared spectra; S3, integrating areas of characteristic absorption peaks and internal standard peaks of functional groups in the infrared spectra to obtain the content change of the unsaturated double bonds at different positions at different times based on changes of peak areas or peak intensities. By the characterization method, the change rule of the content of the functional groups along with the slicing positions and the aging time is studied and the aging reaction and the aging degree of each functional group of the HTPB polyurethane adhesive interface are analyzed; the characterization method is simple and effective, and has a positive meaning for accurately estimating the use and the shelf life of a material and explaining the change mechanism of the interface material.

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Patent Citations (1)

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    CN-103344599-AOctober 09, 2013深圳大学Characterization method for aging reaction of HTPB polyurethane adhesive interface

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