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Open AccessArticle

Influence of Interleaved Films on the Mechanical Properties of Carbon Fiber Fabric/Polypropylene Thermoplastic Composites

1
Regional Research Institute for Fiber & Fashion Materials, Yeungnam University, Gyeongsan 712-749, Korea
2
Department of Textile Engineering and Technology, Yeungnam University, Gyeongsan 712-749, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Luciano Feo
Materials 2016, 9(5), 344; https://doi.org/10.3390/ma9050344
Received: 2 March 2016 / Revised: 18 April 2016 / Accepted: 4 May 2016 / Published: 6 May 2016
(This article belongs to the Section Manufacturing Processes and Systems)
A laminated composite was produced using a thermoplastic prepreg by inserting an interleaved film with the same type of matrix as the prepreg during the lay-up process to improve the low interlaminar properties, which is a known weakness of laminated composites. Carbon fiber fabric (CFF) and polypropylene (PP) were used to manufacture the thermoplastic prepregs. Eight prepregs were used to produce the laminated composites. Interleaved films with different thicknesses were inserted into each prepreg. The physical properties of the composite, such as thickness, density, fiber volume fraction (Vf), and void content (Vc), were examined. The tensile strength, flexural strength, interlaminar shear strength (ILSS), impact property, and scanning electron microscopy (SEM) were used to characterize the mechanical properties. Compared to the composite without any inserted interleaved film, as the thickness of the inserted interleaved resin film was increased, Vc decreased by 51.45%. At the same time, however, the tensile strength decreased by 8.75%. Flexural strength increased by 3.79% and flexural modulus decreased by 15.02%. Interlaminar shear strength increased by 11.05% and impact strength increased by 15.38%. Fracture toughness of the laminated composite was improved due to insertion of interleaved film. View Full-Text
Keywords: interleaved film; thermoplastic composite; polypropylene; surplus resin; compression molding interleaved film; thermoplastic composite; polypropylene; surplus resin; compression molding
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Kim, J.W.; Lee, J.S. Influence of Interleaved Films on the Mechanical Properties of Carbon Fiber Fabric/Polypropylene Thermoplastic Composites. Materials 2016, 9, 344.

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