PNIMMO与典型固体推进剂组分表界面作用研究

Study on surface/interface actions of PNIMMO with typical solid propellant components

为实现聚3-硝酸酯甲基-3-甲基氧杂环丁烷(PNIMMO)在推进剂配方中的进一步应用,研究了PNIMMO与4种典型固体推进剂组分(RDX、HMX、AP及Al)之间的表界面作用。利用接触角测量仪测定了各组分与不同溶剂的接触角,进而得到了各组分的表面张力,在此基础上计算了PNIMMO与典型固体推进剂组分的界面张力和黏附功,并推测了其作用机理。结果表明:PNIMMO的表面张力较小,易于在推进剂组分表面铺展。PNIMMO与推进剂组分间的界面张力大小顺序为:γ_(SL)(PNIMMO-AP)>γ_(SL)(PNIMMO-Al)>γ_(SL)(PNIMMO-RDX)>γ_(SL)(PNIMMO-HMX)。PNIMMO与推进剂组分间的黏附功大小顺序为:W_(a)(PNIMMO-AP)>W_(a)(PNIMMO-RDX)>W_(a)(PNIMMO-HMX)>W_(a)(PNIMMO-Al)。PNIMMO与HMX粘结作用最强,与Al粘结作用最弱。与传统粘合剂HTPB相比,PNIMMO有利于改善推进剂的力学性能和流变性能。

For further application of poly(3-nitratomethy-l-3-methyl oxetane)(PNIMMO)in propellant formulations,the surface-interface action between PNIMMO and four typical solid propellant components(RDX,HMX,AP and Al)was investigated.The contact angles of each component with different solvents were tested by contact angle measuring instrument,and the surface tension was obtained.Then the interfacial tension and the adhesive work were calculated,and the mechanism was speculated.As a result,PNIMMO has a low surface tension and can spread easily on the surface of propellant components.The contrast of interfacial tension between PNIMMO and the propellant components is:γ_(SL)(PNIMMO-AP)>γ_(SL)(PNIMMO-Al)>γ_(SL)(PNIMMO-RDX)>γ_(SL)(PNIMMO-HMX).The contrast of adhesive work between PNIMMO and solid propellant components is:W_(a)(PNIMMO-AP)>W_(a)(PNIMMO-RDX)>W_(a)(PNIMMO-HMX)>W_(a)(PNIMMO-Al).And PNIMMO has the strongest bonding effect with HMX,while has the weakest bonding effect with Al.Compared with HTPB,PNIMMO is beneficial to improve the mechanical properties and rheological properties of propellants.