Novel solutions to offset thermal degradation of polyamide-6 (PA-6) and
organoclay (organically modified layered silicates) nanocomposites during melt
compounding have been investigated. In this research, a novel chain extender
(Joncryl ADR 3400) has been used to improve thermal stability of PA-6 and PA-
6/organoclay nanocomposites during melt compounding. The materials were
compounded using a linear twin extruder and various laboratory scale mixers.
The effects of organoclay and chain extender were studied using both
processing methods. In order to replicate large scale production used in
industry, a comprehensive plan of experimental work was carried out under
different processing conditions (extrusion temperature and screw speed),
organoclay and chain extender loading using a linear twin screw extruder.
Rheology, mechanical and thermal properties were analysed and selected
samples were also characterised by TEM and FTIR. Process induced
degradation of PA-6 during the melt compounding was found to have significant
influence on the rheological and mechanical properties. Rheological and
mechanical characterisation clearly showed showed that incorporation of the
chain extender minimised thermal degradation of PA-6 and nanocomposites during melt processing. Visual analysis of selected nanocomposites using TEM
confirmed that chain extender increased the dispersion of nanoclays in the PA-
6 matrix. The crystallinity of the PA-6 was slightly affected by addition of
organoclay and chain extender. The samples obtained by linear twin screw
extrusion showed higher rheological properties than the samples from
laboratory scale mixers suggesting better mixing and less thermal degradation
during extrusion. / Republic of Turkey, Ministry of National Education. / The full text was made available at the end of the embargo, 31st Dec 2019.
| Identifer | oai:union.ndltd.org:BRADFORD/oai:bradscholars.brad.ac.uk:10454/14583 |
| Date | January 2016 |
| Creators | Tuna, Basak |
| Contributors | Benkreira, Hadj, Kelly, Adrian L. |
| Publisher | University of Bradford, Faculty of Engineering and Informatics |
| Source Sets | Bradford Scholars |
| Language | English |
| Detected Language | English |
| Type | Thesis, doctoral, PhD |
| Rights | <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-nc-nd/3.0/88x31.png" /></a><br />The University of Bradford theses are licenced under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/">Creative Commons Licence</a>. |
Page generated in 0.0019 seconds