Thermally stable and highly recyclable carbon fiber-reinforced polyketone composites based on mechanochemical bond formation

Title
Thermally stable and highly recyclable carbon fiber-reinforced polyketone composites based on mechanochemical bond formation
Authors
이상수박종혁김태안유지완최한형이영모
Keywords
Polymer-matrix composites; Carbon fibre; Recycling; Thermal properties
Issue Date
2021-03
Publisher
Composites. Part A, Applied science and manufacturing
Citation
VOL 142, 106251
Abstract
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 °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.
URI
http://pubs.kist.re.kr/handle/201004/72729
ISSN
1359-835X
Appears in Collections:
KIST Publication > Article
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