不同键合剂与RDX表界面作用

Interfacial Bonding between RDX and Bonding Agents

研究了多羟基醇类(LBA-22、LBA-201)、海因/三嗪类(CBA)、中性聚合物类(NPBA)和取代酰胺类(LTAIC)键合剂与RDX的表界面作用,并在RDX-CMDB推进剂中考察了这些键合剂的作用效果。采用接触角法和Wilhelmy吊板法测定键合剂与RDX的表界面特性参数,利用调和平均方程计算粘附功。结果表明CBA与RDX间的接触角为35.2°,粘附功为135.01mN/m。红外光谱中RDX(—NO2)基团的吸收峰红移22cm-1至1510cm-1,且吸收带展宽。RDX经键合剂表面改性后,推进剂高温最大抗张强度从空白样的1.02MPa提高到2.01MPa,低温延伸率提高140%。各键合剂与RDX间的表界面性能数据与推进剂力学性能改善情况基本一致。

The interfacial bonding between a series of bonding agents （including polyhydroxy alcohols bonding agents （LBA-22, LBA-201 ） , hyantoin/triazines composite bonding agents （CBA） , neutral polymeric bonding agents（NPBA） and substituted amides （LTAIC）） and RDX were studied. Meanwhile, all of the bonding agents were used to prepare RDX-CMDB propellants. The surface and interface parameters were measured by the contact angle method and Wilhelmy plat method, and adhesive work was calculated based on the harmonic-mean equation. Results show that the value of contact angle （θ） between CBA and RDX is 35.2° , and the value of adhesive work（W,） is 135. 01 mN/m. In FTIR spectra, （-NO2） group absorption peak has a 22 cm^-1 red shift to 1510 cm^-1 and the absorption band becomes wide. The mechanical properties of CMDB propellant with coated RDX are significantly improved. The value of σm is increased from 1.02 MPa to 2.01 MPa at high temperature （50℃ ） and the value of εm is increased by 140% at low temperature （ - 40℃ ）. The surface and interface parameters of different bonding agents basically correspond with the mechanical properties improvement of CMDB propellants.