Thesis (MTech (Chemistry))--Cape Peninsula University of Technology, 2011. / Aromatic polyamides (PAs) are widely used as high-performance polymers in technical
applications due to their unique combination of outstanding thermal, optical, mechanical
and chemical properties. Although PAs are mostly utilized where strength or heat
resistance is of primary concern, they also find use in other important applications such
as in NOMEX membranes for desalination of brackish water or seawater.
PAs do however have some disadvantages such as high melting points, high glass
transition temperatures (Tg) and a limited solubility in most organic solvents, which
makes their processing difficult. Polyureas (PUs) are generally known for their excellent
thermal stability and high chemical resistance due to the presence of thermally stable
bonds of aromatic or heterocyclic ring systems along their backbone.
Both polymer systems are poorly researched when it comes to the introduction of furan
units into the chains. The same is valid for cases where two or more different diacids or
diamines are incorporated. The aim of this study was therefore to investigate the
influence of furan units in the polymer chains and the change in properties if the
composition of starting materials is varied further.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:cput/oai:localhost:20.500.11838/2323 |
| Date | January 2011 |
| Creators | Rashwan, Osama |
| Contributors | Hugo, V, Weber, WG, Hugo, V, Weber, WG |
| Publisher | Cape Peninsula University of Technology |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Rights | http://creativecommons.org/licenses/by-nc-sa/3.0/za/ |
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