Influence of PTFE on the Structural-Mechanical Properties and Laws of Burning of the Composites, Containing Aluminium Powders
Earlier by us it has been shown, that the complex modifier polytetrafluoroethylene (PTFE) at formation in optimum conditions forms interpenetrating structures in volume of a composite, which essentially improves a complex of the rheological, mechanical characteristics and combustion peculiarities of various composites. Influence of a degree of dispersiveness and the contents of aluminium powders, and also contents of PTFE on the burning law, mechanical and rheological properties of the modified metallized modelling composites on a basis bivinylstyrene thermoelastoplast and ammonium perchlorate is investigated. By the constant-pressure device the dependence of the burning rate on pressure and initial temperature is determined. By of tungsten -rhenium thermocouples character of distribution of temperatures in a wave of burning of samples is estimated. It is established, that the modification changes a level of the burning rate, temperature of a surface, the pressure exponent in the law of burning and a gradient of temperatures on a site from surface temperature up to the maximal temperature of combustion. It is established, that the modifying of samples leads simultaneously to improvement of its deformative-strength, and rheological characteristics, provides an opportunity of processing of composites with a method of through passage pressing. Efficiency of modifying of mechanical and ballistic characteristics of composites grows with increase in a specific surface of aluminium fillers and its contents, thus durability on the single-axis stretching and on a cut grows up to 10 times, breaking deformation increases up to 5 times, the pressure exponent in the law of burning is reduced up to 10 times in comparison with the samples which are not containing PTFE. Assumptions of the mechanism of substantial improvement of dependence of the burning rate of the modified composites from pressure and initial temperature are stated.
RUSIN D.L. SINYAVSKI N.N.
D.Mendeleyev University of Chemical Technology of Russia,Miusskaya sq.9,125047,Moscow,Russia
国际会议
2011 International Autumn Seminar on Propellants,Explosives and Pyrotechnics(2011国际推进剂、炸药、烟火技术秋季研讨会)
南京
英文
469-479
2011-09-20（万方平台首次上网日期，不代表论文的发表时间）