PIBSA质量分数对现场混装乳化基质热分解特性和流变特性的影响  

The effect of PIBSA mass fraction on the thermal decomposition and rheological properties of on-site mixed emulsion matrix

作　　者：梁昊[1] 孙建辉 李洪伟[1] 丁士祥 孙倩 曾建钿 LIANG Hao;SUN Jian-hui;LI Hong-wei;DING Shi-xiang;SUN Qian;ZENG Jian-tian(School of Chemical and Blasting Engineering,Anhui University of Science and Technology,Huainan 232001,Anhui,China;China Explosive Materials Trade Association,Beijing 100089,China)

机构地区：[1]安徽理工大学化工与爆破学院,安徽淮南232001 [2]中国爆破器材行业协会,北京100089

出　　处：《工程爆破》2024年第6期102-113,共12页Engineering Blasting

基　　金：安徽高校自然科学研究基金资助项目(2022AH050838)。

摘　　要：为探究PIBSA(聚异丁烯丁二酸酐)对现场混装乳化基质的热分解特性及流变特性的影响,利用光学显微镜、激光粒度分析仪、同步热分析技术、旋转流变仪,对含不同质量分数PIBSA(0%、0.5%、1%、1.5%)复合乳化剂的现场混装乳化炸药基质样品的微观特性、热分解特性和流变特性进行了研究。结果表明:添加PIBSA的乳化基质样品内相粒子的均一性较好,平均粒径与分散性指数较未添加PIBSA的有所下降;当体系中的PIBSA的质量分数占0.5%时,其内相平均粒径小、分布均匀性好且爆轰速度高。PIBSA的加入对乳化基质的热分解过程没有明显影响,但随着PIBSA质量分数的增加,表观活化能呈现先升高后降低的趋势。当体系内PIBSA质量分数为0.5%时,乳化基质表观活化能E_o较单一乳化剂(Span-80)样品增加了约14.8%。随着PIBSA质量分数的增加,乳化基质的剪切应力呈现先增大后减小的趋势;Ostwald-deWael模型对乳化基质的流变特性描述最佳,为现场混装乳化基质的力学特性和数学模型开发提供了科学依据。In order to explore the effect of PIBSA(polyisobutylene succinic anhydride)on the thermal decomposition characteristics and rheological properties of in-situ mixed emulsion matrix,the microscopic characteristics,thermal decomposition characteristics and rheological properties of in-situ mixed emulsion explosive matrix samples containing different mass fractions of PIBSA(0%,0.5%,1%,1.5%)composite emulsifiers were studied by laser particle size analyzer,optical microscope,synchronous thermal analysis technology and rotary rheometer.The results showed that the homogeneity of the internal phase particles of the on-site mixed emulsion matrix samples with PIBSA was better,and the average particle size and dispersion index were lower than those without PIBSA.When the mass fraction of PIBSA in the system is 0.5%,the average particle size of the inner phase is small,the distribution uniformity is the best and the detonation velocity is the fastest.The addition of PIBSA had no significant effect on the thermal decomposition process of the emulsion matrix,but with the increase of PIBSA mass fraction,the apparent activation energy shows a trend of first increasing and then decreasing.When the mass fraction of PIBSA in the system is 0.5%,the apparent activation energy E o of the emulsion matrix increases by about 14.8%compared to the single emulsifier(Span-80)sample.With the increase of PIBSA content,the shear stress of the emulsified matrix increased first and then decreased.The Ostwald-deWael model has the best description of the rheological properties of the emulsion matrix,which provides a scientific basis for the mechanical properties and mathematical model development of the on-site mixed emulsion matrix.

关 键 词：现场混装乳化炸药 乳化基质 内相特性 流变特性 流变模型 

分 类 号：TQ564.4[化学工程—炸药化工]