Kim Hancheul, Jang Yoorim, Noh Sitae, Jeong Jongoh, Kim Donghyun, Kang Byeongkwan, Kang Taewun, Choi Hyungtaek, Rhee Hakjune
Department of Bionanotechnology, Hanyang University 55 Hanyangdaehak-ro Sangnok-gu, Ansan Gyeonggi-do 15588 South Korea
Department of Chemical Engineering, College of Engineering Sciences, Hanyang University 55 Hanyangdaehak-ro Sangnok-gu, Ansan Gyeonggi-do 15588 South Korea.
RSC Adv. 2018 May 31;8(36):20032-20038. doi: 10.1039/c8ra03643h. eCollection 2018 May 30.
Carboxylated GAP copolymers (polyGA-carboxylate) compounds (1-7), were synthesized by the simultaneous substitution reaction with PECH, sodium azide, and sodium carboxylate in DMSO. The synthesized compounds (1-7) were characterized by various analysis tools, such as Fourier transform infrared (FT-IR), inverse gated decoupling C-nuclear magnetic resonance (C NMR), gel permeation chromatography (GPC), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), calorimetry, and friction and impact sensitivity. These poly(GA-carboxylate) compounds (1-7) have better thermal properties owing to their lower glass transition temperatures, from -48 °C to -55 °C, compared to glycidyl azide polymer (GAP) (-49 °C) and similar first thermal decomposition temperatures (228-230 °C) in comparison to GAP (227 °C), regardless of the introduction of the carboxylate group in GAP. Moreover, poly(GA-butyrate) and poly(GA-decanoate) have higher heats of combustion (2331 and 2976 kJ mol) and negative formation enthalpies (-0.75 and -2.02 kJ g), while GAP has a lower heat of combustion (2029 kJ mol) and positive formation enthalpy (1.33 kJ g). Therefore, poly(GA-carboxylate) could be a good candidate for the polymeric binder in solid propellants.
羧化GAP共聚物（聚GA - 羧酸盐）化合物（1 - 7）通过在二甲基亚砜（DMSO）中与聚环氧氯丙烷（PECH）、叠氮化钠和羧酸钠同时进行取代反应合成。合成的化合物（1 - 7）通过各种分析工具进行表征，如傅里叶变换红外光谱（FT - IR）、反门控去耦碳核磁共振（C NMR）、凝胶渗透色谱（GPC）、热重分析（TGA）、差示扫描量热法（DSC）、量热法以及摩擦和撞击感度。这些聚（GA - 羧酸盐）化合物（1 - 7）具有更好的热性能，这是由于它们的玻璃化转变温度较低，在 - 48℃至 - 55℃之间，相比缩水甘油叠氮聚合物（GAP）（ - 49℃），并且与GAP（22）相比具有相似的初始热分解温度（228 - 230℃）。此外，聚（GA - 丁酸盐）和聚（GA - 癸酸盐）具有更高的燃烧热（2331和2976 kJ/mol）和负生成焓（ - 0.75和 - 2.02 kJ/g），而GAP具有较低的燃烧热（2029 kJ/mol）和正生成焓（1.33 kJ/g）。因此，聚（GA - 羧酸盐）可能是固体推进剂中聚合物粘合剂的良好候选材料。
