Next Article in Journal
Anionic Polymerization of ε-Caprolactam under the Influence of Water: 2. Kinetic Model
Previous Article in Journal
Hybrid Effect in In-Plane Loading of Carbon/Glass Fibre Based Inter- and Intraply Hybrid Composites
Open AccessArticle

Compensation of Water Influence on Anionic Polymerization of ε-Caprolactam: 1. Chemistry and Experiments

1
Fraunhofer Institute for Chemical Technology (ICT), Department of Polymer Engineering, Joseph-von-Fraunhofer-Str. 7, 76327 Pfinztal, Germany
2
Deggendorf Institute of Technology (DIT), Faculty Mechanical Engineering and Mechatronics, 94491 Deggendorf, Germany
*
Author to whom correspondence should be addressed.
J. Compos. Sci. 2020, 4(1), 7; https://doi.org/10.3390/jcs4010007
Received: 28 October 2019 / Revised: 15 November 2019 / Accepted: 26 December 2019 / Published: 9 January 2020
The activated anionic ring opening polymerization of ε-caprolactam to polyamide 6 is highly sensitive to external influences such as water. Based on an initial theory, preliminary reaction kinetic tests are carried out with the aim of compensating the influence of the water by increasing the activator and catalyst concentration. Different formulations of activator and catalyst were studied to understand the influence of water on the concentration of activator and catalyst. It was found that the compensation of added water with activator and catalyst restores the original reaction time. The test plates produced are examined with regard to their mechanical characteristics and the polymer properties. The results of the mechanical characterization show no significant impairment after compensation of the added water. The physical properties of the matrix show degradation with repeated compensation. However, the residual ε-caprolactam content remains below the critical value of 1% for three of the four investigated formulations. View Full-Text
Keywords: thermoplastic resin; moisture; resin transfer molding; cure behavior; anionic polyamide-6 thermoplastic resin; moisture; resin transfer molding; cure behavior; anionic polyamide-6
Show Figures

Figure 1

MDPI and ACS Style

Wilhelm, M.; Wendel, R.; Aust, M.; Rosenberg, P.; Henning, F. Compensation of Water Influence on Anionic Polymerization of ε-Caprolactam: 1. Chemistry and Experiments. J. Compos. Sci. 2020, 4, 7.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop