GAP改性单基球形药的热分解性能研究

采用热重-微热重(TG-DTG)和差示扫描量热(DSC)实验,研究了纯单基球(NC)、聚叠氮缩水甘油醚(GAP)以及GAP改性的单基球形药的热分解性能,探索了球药中主要组分NC和GAP之间的相互作用. 实验结果表明:GAP质量分数分别为20%和30%的改性单基球形药在发生热分解时,存在GAP的热分解过程,且其主链的热分解峰值温度较纯,GAP相应的峰值温度分别提前3.5℃和8.4℃. DSC测试显示,NC的热分解产物和热量使GAP质量分数为20%和30%的改性单基球中—N₃基团的放热峰分别降低8.18℃和7.70℃,即发现在GAP改性的单基球中,NC的存在对GAP的热分解具有一定的促进作用. 

An Investigation on the Thermal Decomposition Properties of GAP Modified Single Base Spherical Powder

Thermal decomposition behavior of pure single base spherical powder(NC), glycidyl azide polymer (GAP) and GAP modified single base spherical powder were investigated by means of TG-DTG and DSC test methods. The interaction among main ingredients NC and GAP were discussed. The experimental results show that the thermal decomposition process of GAP exists in the thermal decomposition process of the mass fraction of 20% or 30% GAP modified single base spherical powder and, compared to the corresponding peak temperature of pure GAP, the thermal decomposition peak temperature of main chain is 3.5℃ and 8.4℃ in advance, respectively. DSC tests show that the decomposition exothermic peak of —N₃ group of the mass fraction of 20% and 30% GAP modified single base spherical powder is respectively reduced by 8.18℃ and 7.70℃ by the thermal decomposition products and heat of NC. It indicates that the presence of NC could promote the thermal decomposition of GAP modified single base spherical powder.