石墨对TATB基PBX导热性能的影响  

Effect of Graphite on Thermal Conduction Properties of TATB-based Polymer Bonded Explosives

作　　者：林聪妹[1] 刘佳辉[1] 何冠松[1] 巩飞艳[1] 黄忠[1] 蒋跃强[1] 潘丽萍[1] 张建虎[1] 刘世俊[1] 

机构地区：[1]中国工程物理研究院化工材料研究所,四川绵阳621999

出　　处：《含能材料》2015年第11期1119-1123,共5页Chinese Journal of Energetic Materials

摘　　要：为有效调节TATB基高聚物粘结炸药(PBX)的导热性能,利用闪光导热仪研究了石墨包覆方式(内包和外包)、温度及石墨含量对TATB基PBX导热系数的影响,应用Agari模型分析了TATB基PBX的导热机制。结果表明,添加高导热石墨可改善TATB基PBX的导热性能。常温下,由内包和外包1%(质量分数)石墨改性的TATB基PBX配方的导热系数分别为0.572 W·(m·K)-1和0.697 W·(m·K)-1,显示,外包石墨包覆方式比内包石墨包覆方式更好。与不含石墨的TATB基PBX相比,内包1%和外包1%石墨的TATB基PBX的导热性能分别提高4.76%和27.66%。随温度升高,TATB基PBX及其石墨改性配方的导热性能逐渐降低。随着石墨含量增加,外包石墨改性的TATB基PBX的导热性能升高。外包2%(质量分数)石墨可使TATB基PBX的导热系数提高至0.786 W·(m·K)-1。TATB基PBX及由内包石墨改性的配方的导热机制符合串联模型,而由外包石墨改性的配方的导热机制介于串联模型和并联模型之间。To regulate the thermal conduction performance of TATB-based polymer bonded explosive （ PBX）, the effects of graphite coating way （ inner-coating and outer-coating）, temperature and graphite content on the thermal conductivity of TATB-based PBX were investigated by a laser thermal conductivity apparatus. The thermal conduction mechanism of TATB-based PBX was analyzed by Agari model. Results show that the addition of graphite with high thermal conduction performance can improve the thermal conduction performances of TATB-based PBXs under room temperature, and the thermal conductivities of TATB-based PBXs with 1% （ mass fraction） inner-coating and 1% outer-coating graphite are 0. 572 W·（ m ·K） -1 and 0. 697 W · （ m · K） -1, respective- ly, revealing that the outer-coating graphite way is better than inner-coating. Compared with the TATB-based PBX without graph- ite, thermal conductivities of TATB-based PBXs with 1% inner-coating graphite and 1% outer-coating graphite increase by 4.76% and 27.66%, respectively. With the increasing of temperature, the thermal conductivities of TATB-based PBX and its formulations modified with graphite gradually decrease. With increasing the graphite content, thermal conduction performances of TATB-based PBXs modified with outer-coating graphite increase. The 2% （mass fraction） outer-coating graphite can make the thermal conduc- tivity of TATB-based PBX increase to 0. 786 W · （ m · K） -1. The thermal conduction mechanism of TATB-based PBX and formula- tion modified with inner-coating graphite accords with the series model, whereas the thermal conduction mechanism of formula- tion modified with outer-coating graphite is between series model and parallel model.

关 键 词：TATB 高聚物粘结炸药(PBX) 石墨 导热性能 包覆方式 

分 类 号：TQ560.1[化学工程—炸药化工]