You, Jiwan Lee, Young Mo Choi, Han-Hyeong Kim, Tae Ann Lee, Sang-Soo Park, Jong Hyuk 2024-01-19T15:05:23Z 2024-01-19T15:05:23Z 2021-09-05 2021-03 1359-835X https://pubs.kist.re.kr/handle/201004/117326 Compounding polyketone (PK) with carbon fibers (CFs) can provide composites that exhibit excellent properties. However, the thermal stability of PK itself is poor, limiting practical applications at high temperatures. Herein, a novel process is proposed to improve the thermal stability of PK-based carbon fiber-reinforced polymers (CFRPs). The plasma-assisted mechanochemistry (PMC) process creates mechanochemical bonds between materials under dry conditions, reducing polymer chain mobility at high temperatures and increasing the stiffness. Compared with conventional PK-based CFRPs, PMC-processed CFRPs have significantly higher glass transition temperatures and storage modulus, resulting in improved thermal stability. The tensile strength remained >90% after annealing at 150 degrees C for 1000 h. Moreover, despite repeated thermal hysteresis, the recycled PK-based CFRPs showed tensile strength, Young's modulus, and elongation at break that were >90% of initial values. This work provides a feasible and ecofriendly strategy to expand the applications and promote repeated recycling of PK-based CFRPs. English ELSEVIER SCI LTD Thermally stable and highly recyclable carbon fiber-reinforced polyketone composites based on mechanochemical bond formation Article 10.1016/j.compositesa.2020.106251 1 Composites Part A: Applied Science and Manufacturing, v.142 Composites Part A: Applied Science and Manufacturing 142 N scie scopus 000618630700001 2-s2.0-85099655140 Engineering, Manufacturing Materials Science, Composites Engineering Materials Science Article MECHANICAL-PROPERTIES DEGRADATION POLYMERIZATION STABILIZATION ENTANGLEMENT NANOTUBES CATALYST SURFACE DOTS Polymer-matrix composites Carbon fibre Recycling Thermal properties