炔丙基二甲基海因改性GAP的合成及应用

3-炔丙基-5，5-二甲基海因（PDMH）与聚叠氮缩水甘油醚（GAP）在二甲基甲酰胺（DMF）溶剂中进行反应，反应摩尔比为：PDMH／GAP=6／7，反应在60℃的条件下进行48h反应完全。PDMH上的炔基与GAP上的叠氮基团发生反应，反应产物为GAP—PDMH。对GAP-PDMH进行了傅立叶变换红外光谱和核磁共振氢谱分析，测定了GAP—PDMH的玻璃化转变温度。实验结果表明，PDMH通过1，3-偶极环加成反应生成三唑五元环结构进入到叠氮粘合剂的侧链中。把GAP—PDMH应用到GAP推进剂的配方中，进行了力学性能测试。与空白样相比较，GAP-PDMH的加入使得推进剂的常温抗拉强度提高了210％，达到了0．65MPa；最大延伸率提高了226％，达到了22．24％；断裂延伸率提高了207％，达到了25．87％。

Synthesis of PDMH-GAP and Its Application

CAP-PDMH was prepared by the chemical reaction between alkyne and azide in DMF,and the molar ratio was 6/7. The reaction temperature was 60 ℃ and reaction time was 48 h. The GAP-PDMH was identified by FT-IR and ~1H NMR, and glass transition temperature of the GAP-PDMH was measured. Results show that PDMH is grafted into the branch of GAP chains by 1,3-dipolar cycloaddition reaction between alkyne and azide. Mechanical properties of composite GAP propellant with GAP-PDMH were tested. Compared with the blank sample, GAP-PDMH can improve the mechanical properties of the composite propellant at room temperature. The maximum tensile strength is increased by 210% (to be 0. 65 MPa) ; the maximum elongation is increased by 226% (to be 22. 24% ) ; the fracture elongation is increased by 207% (to be 25. 87% ).