不同固化剂对浇注高聚物黏结炸药药浆固化时间的影响  

Effect of Different Curing Agents on the Curing Time of Casting Polymer Bonded Explosives Slurry

作　　者：金智恺 常双君 董佳易 李沙 JIN Zhi-kai;CHANG Shuang-jun;DONG Jia-yi;LI Sha(School of Environment and Safety Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学环境与安全工程学院,太原030051

出　　处：《科学技术与工程》2024年第11期4643-4648,共6页Science Technology and Engineering

摘　　要：为探究不同固化剂应用于浇注高聚物黏结炸药(polymer bonded explosives,PBX)药浆时的固化时间,利用傅里叶变换红外光谱仪、旋转流变仪及邵氏A型硬度计,研究了甲苯二异氰酸酯(TDI)、二聚酸二异氰酸酯(DDI)及TDI/DDI混合固化剂对浇注PBX药浆固化过程中的固化反应速率、适用期及固化时间的影响。结果表明,不同固化剂与端羟基聚丁二烯(HTPB)在55℃下的反应速率大小关系为k_(TDI)>k_(TDI/DDI)>k_(DDI),且反应遵循二级反应规律。对于高固含量的浇注PBX药浆,在固化比1.2、固化温度55℃的条件下,采用TDI固化剂时适用期为4 h,固化时间为72 h;采用DDI固化剂时,适用期能够达到5 h以上,但其固化时间为128 h;采用TDI/DDI混合固化剂时,固化时间缩短为96 h,适用期可以达到5 h以上,固化效果较为理想。In order to investigate the curing time of different curing agents used in casting polymer bonded explosives,Fourier transform infrared spectrometer,rotary rheometer and Shore A hardness tester were used to investigate the effects of toluene diisocyanate(TDI),dimeric acid diisocyanate(DDI)and TDI/DDI mixed curing agent on curing rate,pot life and curing time of pouring PBX slurry.The results show that the reaction rate of HTPB with different curing agents at 55℃is k_(TDI)>k_(TDI/DDI)>k_(DDI),and the reaction follows the second-order reaction rule.For cast PBX slurry with high solid content,at a curing ratio of 1.2 and curing temperature of 55℃,using TDI curing agent,suitable pot life was 4 hours,curing time was 72 hours;Using DDI curing agent,pot life can reach more than 5 hours,but its curing time was 128 hours.Using TDI/DDI mixed curing agent,curing time is 96 hours,pot life can reach more than 5 hours,curing effect is more ideal.

关 键 词：适用期 固化时间 甲苯二异氰酸酯 二聚酸二异氰酸酯 浇注PBX药浆 

分 类 号：TQ560.1[化学工程—炸药化工]