The polymeric binders play a key role in the solid propellant, so the research on improving the performance of the binder has become particularly important. In this work, a novel fluorine-containing triblock copolymer PFPO-PTMG-PFPO and a fluorine-free triblock copolymer PECH-PTMG-PECH were obtained by the cationic ring-opening polymerization of 2-(2,2,3,3-Tetrafluoro-propoxymethyl)-oxirane (FPO) and epichlorohydrin (ECH) with Polytetramethylene Ether Glycol (PTMG), respectively. In comparison with PECH-PTMG-PECH, the three molecular weights of PFPO-PTMG-PFPO with fluorine-containing side chains had a higher glass transition temperature. With the increase of the fluorine-containing side chains, the molecular weights increased, and the T_g also gradually increased from -64.1 ℃ to -51.8 ℃ in the DSC curves. The TGA-DTG curves indicated that three molecular weights of PFPO-PTMG-PFPO had a good thermal stability, and it was sharp weight loss temperature at around 368.0 ℃. Besides, the viscosity measurement indicated that the viscosity of the higher molecular weight of PFPO-PTMG-PFPO(c) (5357 g/mol) was lower than that of PFPO-PTMG-PFPO(b) (8266 g/mol). When a certain amount of fluorine-containing block was inserted, the influence of low friction coefficient of fluorine-containing polymer was dominant, in which performed the decreased polymer viscosity of the polymer as the increased molecular weight.

聚合物粘合剂在固体推进剂中起着关键作用，因此提高粘合剂性能的研究变得尤为重要。在这项工作中，通过 2-(2,2,3,3-四氟-丙氧基甲基)-环氧乙烷 (FPO) 和环氧氯丙烷 (ECH) 分别与聚四亚甲基醚乙二醇 (PTMG)。与PECH-PTMG-PECH相比，含氟侧链PFPO-PTMG-PFPO的三种分子量具有更高的玻璃化转变温度。随着含氟侧链的增加，分子量增加，T _g在 DSC 曲线中也从 -64.1 ℃ 逐渐增加到 -51.8 ℃。TGA-DTG曲线表明，三种分子量的PFPO-PTMG-PFPO具有良好的热稳定性，在368.0℃左右出现急剧的失重温度。此外，粘度测量表明，较高分子量的PFPO-PTMG-PFPO(c) (5357 g/mol) 的粘度低于PFPO-PTMG-PFPO(b) (8266 g/mol)。当加入一定量的含氟嵌段时，含氟聚合物低摩擦系数的影响占主导地位，其中聚合物的聚合物粘度随着分子量的增加而降低。