PBT与高能氧化剂的相互作用的热分析法研究

用高压差示扫描量热法(PDSC)和热重-微商热重法(TG-DTG),研究了PBT与CL-20、DNTF、TNAZ、ADN之间的相互作用.结果表明,CL-20受到PBT的促进而提前分解,PBT/CL-20中CL-20的分解峰温比CL-20单组分提前了33.7℃,一部分PBT因受到CL-20和(或)其分解产物的作用也提前分解.PBT大分子对DNTF和TNAZ的气化起到抑制作用,并使其分解放热反应大幅提前近100℃,同时,DNTF和TNAZ气相产物对PBT的分解也有促进作用.除了PBT对ADN产物AN的升华过程有抑制外,PBT和ADN及其凝聚相产物之间的相互作用较小,但ADN的气相产物对PBT和ADN都有一定的影响.

Interactions of PBT with Some High Energy Oxidizers by Thermal Analysis

The interactions for 3,3-bis(azidomethyl)oxetane/tetrahydrofuran copolymer(PBT)with hexanitrohexaazaisowurtzitane(CL-20),3,4-dinitrofurazanfuroxan(DNTF),1,3,3-trinitroazetidine(TNAZ)and ammonium nitrate(ADN)were studied by using pressure differential thermal analyzer(PDSC)and thermogravimetry-derivative thermogravimetry(TG-DTG).The results show that decomposition of CL-20 is accelerated by PBT,decomposition peak temperature of CL-20 in PBT/CL-20 is a drop in 33.7 ℃ compared with that of pure CL-20.A part of PBT is also accelerated to decompose for the effect of the CL-20 and(or)its decomposition products.Sublimation and volatilization of the DNTF and TNAZ may be restrained by macromolecule of PBT,and their decompositions are advanced about 100 ℃.Besides,PBT is also accelerated to decompose by the decomposed gas products of DNTF and TNAZ.The interaction for PBT with ADN and its condensed phase products is not evident,except for the restraint effect of PBT on the sublimation of AN as the products of ADN.However,the gas products of ADN exert an influence on the PBT and ADN.