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为改善含纳米铝粉的复合推进剂和PBX炸药的工艺性能,研究了nano-Al与端羟基聚丁二烯(HTPB)、聚叠氮缩水甘油醚(GAP)和环氧乙烷四氢呋喃共聚醚(PET)的相互作用。利用RS-300流变仪,探讨了3种粘合剂及nano-Al/粘合剂=1∶2时悬浮液的流变性能。结果表明,3种粘合剂表现出假塑性流体特征,表观粘度均小于3 Pa·s,自身分子链段之间相互作用较弱,在30~60℃内,随温度增加,nano-Al悬浮液表观粘度均减小,其中nano-Al/HTPB和nano-Al/GAP属于对温度较敏感假塑性流体,流动活化能分别为38.05 kJ/mol和52.07 kJ/mol,但nano-Al/PET属于对切变速率变化敏感宾汉流体,流动活化能仅1.506 kJ/mol。采用DCAT 21型动态接触角/表面张力仪测量了nano-Al、GAP、HTPB、PET的接触角,计算的nano-Al与3种粘合剂之间的粘合功W和铺展系数S大小次序为W nano-Al/PET>W nano-Al/GAP>W nano-Al/HTPB,S nano-Al/PET>S nano-Al/GAP>S nano-Al/HTPB,说明nano-Al与3种粘合剂的相互作用大小次序为nano-Al/PET>nano-Al/GAP>nano-Al/HTPB,该结果与3种悬浮液表观粘度值趋势一致。
In order to improve the process performance of composite propellants and PBX explosives containing nano-aluminum powder, the effects of nano-Al with hydroxyl terminated polybutadiene (HTPB), poly azide glycidyl ether (GAP) and ethylene oxide tetrahydrofuran (PET) interaction. Using RS-300 rheometer, the rheological properties of three kinds of binders and nano-Al / binder = 1: 2 suspension were discussed. The results showed that the three kinds of binders exhibited the characteristics of pseudoplastic fluid with apparent viscosity less than 3 Pa · s and weak interaction between molecular chains. With the increase of temperature, nano-Al Nano-Al / HTPB and nano-Al / GAP belong to the temperature-sensitive pseudoplastic fluid, and their activation energies are 38.05 kJ / mol and 52.07 kJ / mol, respectively. PET belongs to Binham fluid which is sensitive to the change of shear rate, and the activation energy of flow is only 1.506 kJ / mol. The contact angles of nano-Al, GAP, HTPB and PET were measured by DCAT 21 dynamic contact angle / surface tensiometer. The order of adhesion W and spreading factor S between nano-Al and three kinds of adhesives were calculated Nano-Al / PET> W nano-Al / GAP> W nano-Al / HTPB and S nano-Al / PET> S nano-Al / GAP> S nano-Al / The order of the interaction of the binders was nano-Al / PET> nano-Al / GAP> nano-Al / HTPB. The results showed the same trend with the apparent viscosity of the three suspensions.