Graduate Student Oral Session (I) (English)
[O7-12]
Effect of Bulky Polycyclic Units on the Processability and Thermal Stability of Phenylethynyl-Terminated Imide Oligomer-Based Thermoset Resins
발표자배정민 (경북대학교)
연구책임자남기호 (경북대학교)
Abstract
Polyimides are high-performance polymers widely employed in aerospace and electronics due to their excellent thermal and mechanical properties. Phenylethynyl end-capped polyimides (PETIs) were developed to improve processability by controlling molecular weight, yet their rigid backbones and strong interchain interactions still limit melt-processability. To address this, structural modifications using bulky moieties have been investigated. In this study, phenylethynyl end-capped oligoimides were synthesized by varying the molar ratios of cage-structured adamantane-1,3-diamine and 3,4'-oxydianiline. The incorporation of adamantane units disrupted chain packing, increased free volume and enhanced melt flow behavior. The thermal and rheological properties of the resulting oligoimides were systematically compared, demonstrating that backbone engineering using sterically hindered diamines offers a promising route to improve the processability of high-performance thermosetting polyimides.