Evaluation of new GFRTP and CFRTP using epsilon caprolactam as matrix fabricated with VaRTM
| Autor: | Kazuhiro Sakata, Norio Hirayama, Koichi Nakamura, Akiko Hirabayashi, Goichi Ben |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Science and Engineering of Composite Materials, Vol 22, Iss 6, Pp 633-641 (2015) |
| ISSN: | 2191-0359 0792-1233 |
| DOI: | 10.1515/secm-2014-0013 |
| Popis: | Thermoplastic resins used as a matrix of fiber reinforced thermoplastics (FRTPs) are composed of high polymers that remain highly viscous even at a higher temperature than their melting points. As a result, they need an even higher temperature, a higher pressure and a longer processing time to allow them to bond with fibers that require large and specialized equipment. In contrast, fiber-reinforced thermoset plastics (FRPs) can be easily molded owing to the use of lower viscosity liquid resin as the matrix using simpler devices. In this paper, a new fabrication method of FRTPs using in situ polymerizable ε caprolactam as the matrix is presented. This method uses vacuum-assisted resin transfer molding without the need for large and specialized equipment. The ε-caprolactam molecules were converted from their monomer form into a polyamide 6 resin, with ring-opening polymerization of ε-caprolactam during the molding process at a lower temperature than its melting temperature. The two kinds of FRTPs obtained using ε-caprolactam as the matrix had neither voids nor unfilled parts because ε-caprolactam had a very low viscosity before the polymerization. These FRTPs not only exhibit superior bending properties but also are suitable for high-speed molding, namely, within a few minutes of process time. |
| Databáze: | OpenAIRE |
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