An Investigation on the Feasibility of Fabricating Composites Using Outdated Waste Carbon Fibers and Easily Disposable Polyolefin Resins

Outdated-waste-carbon-fiber-reinforced olefin composites (oCFOCs) were fabricated with easily disposable polyolefin resins, polypropylene (PP), high-density polyethylene (HDPE), and low-density polyethylene (LDPE), by compressive molding using a hot press. The flexural and impact strengths of the oC...

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Bibliographic Details
Published in:Polymers 2021-08, Vol.13 (17), p.2938
Main Authors: Kwon, Dong-Jun, Cho, Kang Rae, Seo, Hyoung-Seock
Format: Article
Language:English
Subjects:
Aging
Carbon fiber reinforced plastics
Carbon fibers
Dimensional stability
Fiber composites
Fiber reinforced polymers
High density polyethylenes
Humidity
Hydrogen bonds
Impact strength
Low density polyethylenes
Manufacturing
Mechanical properties
Moldability
Polyethylene
Polymer matrix composites
Polyolefins
Recycling
Resins
Shear strength
Tensile strength
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Summary:Outdated-waste-carbon-fiber-reinforced olefin composites (oCFOCs) were fabricated with easily disposable polyolefin resins, polypropylene (PP), high-density polyethylene (HDPE), and low-density polyethylene (LDPE), by compressive molding using a hot press. The flexural and impact strengths of the oCFOCs from each respective resin type and oCF content, ranging from 35 to 70 wt.%, were increased by the aging treatment (120 °C and 95% humidity under a pressure of 0.8 MPa) until an aging time of three days, due to improved resin impregnation. For the oCFOC with PP, the hydrogen bond between PP and developed C-O groups due to the aging treatment and the existing silane layer of oCF is considered to assist cohesion between the resin and oCF. In particular, PP and 45 wt.% oCF content were the most effective conditions for improving the oCFOCs’ mechanical properties, in addition to endowing the oCFOCs with good moldability and dimensional stability. Our results demonstrate that durable recycled composites can be manufactured using oCF and PP.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym13172938