摘要
为了研究聚乙烯醇缩丁醛(PVB)基高固体含量推进剂的力学性能,采用静态力学试验分析了不同黏度PVB、黏度为45 m Pa·s和300 m Pa·s的PVB配合和增塑剂邻苯二甲酸二丁酯(DBP)及乙酰柠檬酸三丁酯(ATBC)对PVB基高固体含量推进剂力学性能的影响。采用动态热机械分析(DMA)研究了不同黏度PVB和两种增塑剂对PVB基推进剂动态力学性能影响。结果表明,随着PVB黏度增加,推进剂高温(50℃)拉伸强度增大,常温(20℃)和高温延伸率降低。黏度为45 m Pa·s与300 m Pa·s的PVB以1∶3的质量比配合做粘合剂可使推进剂拉伸力学性能达到含这两种单一黏度PVB的推进剂的中间值。用ATBC替代DBP,推进剂的低(-40℃)、常温延伸率下降33%。含黏度为45 m Pa·s PVB的PVB基推进剂有较强的α-转变。含增塑剂DBP的推进剂有较强的β-转变。
To study the mechanical properties of polyvinyl butyral（ PVB）-based high solid content propellant,the effect of PVB with various viscosity,PVB blended with viscosity of 45 m Pa·s and 300 m Pa·s and plasticizers 1,2-dibutylphthalate（ DBP） and acetyl tributylcitrate（ ATBC） on the PVB-based high solid content propellant was analyzed by a static mechanical test. The effect of PVB with various viscosity and two plasticizers on the dynamic mechanical property of PVB-based propellant was studied by dynamic thermomechanical analysis（ DMA）. Results show that with the increase of the viscosity of PVB,the high temperature tensile stress of the propellant increases,the normal temperature and high temperature elongation decrease. The PVB blended with mass ratio of 1 ∶ 3 with viscosity of 45 m Pa·s and 300 m Pa·s can make the tensile mechanical properties of the propellant achieve the average value of these two kinds of single viscosity propellant. Replacing DBP with ATBC decreases low and normal temperature tensile elongation slightly The PVB based propellant with PVB of viscosity of 45 m Pa·s has stronger α-transformation and the propellant with plasticizer DBP has stronger β-transformation.
出处
《含能材料》
EI
CAS
CSCD
北大核心
2015年第10期936-940,共5页
Chinese Journal of Energetic Materials
