To meet the high requirements for polyimide (PI) manufacturing process without sacrificing material performance, a new type fabrication method for PI is proposed here. Based on the classical Kapton system, functionalized precursor polyamide acid (MPAA) resin solution with high solid content, low viscosity and high relative molecular weight was obtained via mercaptoacetic acid locking imine (MALI) reaction, and a series of linear Mali‐Polyimide (MPI) films were prepared and their properties were well investigated. The results showed that MPIs have relatively excellent thermal stability (T_d5%: 598 ~ 601°C), good heat resistance (T_g: 277 ~ 278 °C) and high adhesion strength. This work emphasizes the possibility and potential of MALI reaction in PI synthesis and is expected to be applied in coating and adhesive field.

中文翻译：

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基于巯基乙酸锁定亚胺反应的功能化聚酰亚胺：合成与涂料应用

为了在不牺牲材料性能的情况下满足聚酰亚胺（PI）制造工艺的高要求，本文提出了一种新型的PI制造方法。基于经典的Kapton系统，通过巯基乙酸锁亚胺（MALI）反应和一系列线性马来聚酰亚胺（MPI）获得具有高固含量，低粘度和高相对分子量的功能化前体聚酰胺酸（MPAA）树脂溶液）制备了薄膜，并对其性能进行了深入研究。结果表明，MPI具有相对优异的热稳定性（T _d5％：598〜601°C）和良好的耐热性（T _g：277〜278°C）和高粘合强度。这项工作强调了PI合成中MALI反应的可能性和潜力，有望应用于涂料和粘合剂领域。