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作 者:廖肃然[1] 罗运军[1] 孙杰[2] 谭惠民[1]
机构地区:[1]北京理工大学材料科学与工程学院 [2]中国工程物理研究院化工材料研究所,四川绵阳621900
出 处:《含能材料》2006年第5期336-339,共4页Chinese Journal of Energetic Materials
基 金:国家自然科学基金(10276007)
摘 要:采用丙酮回流法合成了乳化能力较好、硬段含量为45%的水性聚氨酯,用FTIR表征了所得产物,用激光粒度分析仪测试了乳液粒径分布范围为0.2~2.3μm,属于部分水溶性的胶态分散液。DSC测试显示该水性聚氨酯树脂在227℃开始分解,263、379℃出现双分解吸热峰,分别隶属于硬段和软段的分解。将合成水性聚氨酯包覆CL-20用FT Raman光谱和SEM表征证明包覆成功,且包覆后的CL-20的撞击感度H50提高近40%。The waterborne polyurethane ( WPU ) emulsions were synthesized with toluene diisocyanates (TDI) , poly ( propylene glycol) (PPG) , dimethylolpropionic acid (DMPA) and 1,4-butanediol ( BDO ) under acetone reflux, and characterized by Fourier transform infrared (FTIR) , differential scanning calorimetry (DSC) , and particle size distribution measurements. It shows that the particle size distribution of emulsion is 0.2-2.3 μm, the waterborne polyurethane resin degraded obviously at 263 ℃ and 379 ℃attributes to the degradation of hard segment and soft segment respectively, which is an endothermic course. The scanning electron microscopy (SEM) images and FT-Raman spectra reveal that CL-20 is successfully coated by waterborne polyurethane. The impact sensitivity experimental results indicate that the characteristic height H50 of CL-20 coated by WPU is increased by 40 percent.
分 类 号:TQ323.8[化学工程—合成树脂塑料工业]
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