少烟复合改性双基（CMDB）推进剂力学性能研究

推进技术 ›› 1994, Vol. 15 ›› Issue (6): 83-87.

少烟复合改性双基（CMDB）推进剂力学性能研究

冯增国,侯竹林,王恩普

北京理工大学化工与材料学院;北京理工大学化工与材料学院;北京理工大学化工与材料学院

发布日期:2021-08-15

A STUDY ON MECHANICAL PROPERTIES OF REDUCED SMOKE COMPOSITE MODIFIED DOUBLE-BASE PROPELLANT

College of Chemical Engineering and Material Science,Beijing Institute of Technology, Beijing, 100081;College of Chemical Engineering and Material Science,Beijing Institute of Technology, Beijing, 100081;College of Chemical Engineering and Material Science,Beijing Institute of Technology, Beijing, 100081

Published:2021-08-15

摘要/Abstract

摘要： 在混合硝酸酯ＮＧ／ＢＴＴＮ（ＤＥＧＮ）＝１和溶棉比ＮＧ＋ＢＴＴＮ（ＤＥＧＮ／ＮＣ＋ＰＥＧ＝３．５～４．０的少烟复合改性双基推进剂配方中，选择聚乙二醇（ＰＥＧ）预聚物取代部分ＮＣ，研究了其含量和分子量变化对力学性能的影响。发现当ＰＥＧ含量为４％，ＮＣ为７％时，在两种混合增塑剂中都可使－４０℃下最大延伸率超过４０％。从溶涨实验中观察到，随着配方中ＰＥＧ含量增加，尽管［ＮＣＯ］／［ＯＨ］值也增加，但相对交联点密度降低，因而改善了力学性能。

关键词: 复合改性双基推进剂;少烟推进剂~＋;应变;拉伸强度

Abstract: n compositions of reduced smoke composite modified double-base propellant (CMDB) with a mixture of nitrate ester NG/BTTN (DEGN)=1 and a ratio of . solvent to nitrocellulose NG+BTTN (DEGN ) /NC + PEG =3.5～4.0,polyethylene glycol (PEG) has been chosen as a prepolymer to substitute for a part of nitrocellulose (NC) to investigate the effects of its varying content and molecular weight on propellant’s mechanical properties. In both of mixing plasticizers, the maximum elogation at -40℃ was noticed to exceed 40% when the propellant contains 4% PEG and 7% NC. It was observed in the swelling experiment that although the value of [NCO]/[OH] increases as increasing the PEG content,the relative cross-linking density decreases so as to improve the mechanical properties.

Key words: Modified composite double-base propellant;Reduced smoke propellant;Strain;Tensile strength

冯增国,侯竹林,王恩普. 少烟复合改性双基（CMDB）推进剂力学性能研究[J]. 推进技术, 1994, 15(6): 83-87.