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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。
Polyethylene glycol (PEG) was chosen as the least smoke modified double base propellant formulation with mixed NG / BTTN (DEGN) = 1 and NG / BTTN (DEGN / NC + PEG = 3.5-4.0) Part of the NC was replaced by the prepolymer, and the effect of its content and molecular weight on the mechanical properties was studied. It was found that when the PEG content was 4% and the NC was 7% Elongation of more than 40% from the swelling experiment was observed, with the PEG content increased in the formula, although the value of [NCO] / [OH] also increased, but the relative crosslinking point density decreased, thus improving the mechanical properties.