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http://dx.doi.org/10.7234/composres.2017.30.6.365

Improvement of Physical Properties for Carbon Fiber/PA 6,6 Composites  

Song, Seung A (Department of Organic Materials and Fiber Engineering, Chonbuk National University)
On, Seung Yoon (Department of Organic Materials and Fiber Engineering, Chonbuk National University)
Park, Go Eun (Department of Organic Materials and Fiber Engineering, Chonbuk National University)
Kim, Seong Su (Department of Mechanical Engineering, KAIST)
Publication Information
Composites Research / v.30, no.6, 2017 , pp. 365-370 More about this Journal
Abstract
Mechanical properties of carbon fiber reinforced thermoplastic composites (CFRTPs) are affected by various factors. One of the them are poor compatibility of the epoxy sizing layer on the carbon fiber surface with thermoplastic matrix, which causes the inferior interfacial strength between fibers and matrix. In addition, the high molten-viscosity of thermoplastics attributes to the poor impregnation state. Consequently, many voids in the composite materials were generated, which leads to poor mechanical properties of the thermoplastic composites. In this study, the epoxy sizing on the carbon fiber surface was removed and the polyamide 6,6 solution was coated on the de-sized carbon fiber surface to improve the impregnation state and mechanical properties. Interlaminar shear strength (ILSS) of CFRPTs was estimated by implementing short beam shear tests. In addition, flexural strength was measured and the impregnation state of the composites was evaluated by calculating void content.
Keywords
Carbon fiber; Thermoplastic resin; Interlaminar shear strength; Flexural strength; Void content;
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