首页|不同固化剂对浇注高聚物黏结炸药药浆固化时间的影响

不同固化剂对浇注高聚物黏结炸药药浆固化时间的影响

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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kTDI＞kTDI/DDI＞kDDI,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.
Effect of Different Curing Agents on the Curing Time of Casting Polymer Bonded Explosives Slurry
In order to investigate the curing time of different curing agents used in casting polymer bonded explosives,Fourier trans-form 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 kTDI＞kTDI/DDI＞kDDI,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.

pot lifecuring timetoluene diisocyanatedimer acid diisocyanatecasting PBX slurry

金智恺、常双君、董佳易、李沙

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中北大学环境与安全工程学院,太原 030051

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

2024

10.12404/j.issn.1671-1815.2305784

科学技术与工程
中国技术经济学会

科学技术与工程

CSTPCD北大核心
影响因子：0.338
ISSN：1671-1815
年,卷(期)：2024.24(11)
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