Tirri, Teija, Aubert, Melanie, Pawelec, Weronika, Wilén, Carl-Eric, Pfaendner, Rudolf, Hoppe, Holger, Roth, Michael and Sinkkonen, Jari (2014) Preparation and characterization of bis-[1,3,5]triazinyl diazenes and their utilization as flame retardants in polypropylene films. Journal of Applied Polymer Science, 131 (12). ISSN 00218995
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Official URL: http://dx.doi.org/10.1002/app.40413
A series of bis-[1,3,5]triazinyl diazenes and two metal complexes thereof were synthesized and tested as new flame retardants in polypropylene films. It was observed that electron withdrawing triazinyl ring substituents (i.e. Cl and phenyl moieties) improved the thermal stability of diazene compounds, whereas electron donating groups (i.e. methoxy, dimethylamino and ethylthio moieties) had a destabilizing effect. TGA, DTA/DSC, NMR and ATR-FTIR were used for the characterization. Quantum mechanical modeling (Gaussian 09) was also utilized to facilitate the interpretation of the NMR data. Bis-(4,6-dichloro-[1,3,5]triazin-2-yl)-diazene 1 and bis-(4,6-dimethoxy-[1,3,5]triazin-2-yl)-diazene 2 were found to be effective flame retardants in polypropylene films and DIN4102-1 B2 classification was reached already at a loading of 0.5 wt%. Interestingly, the copper complex of 2 showed even higher fire retardant activity than its precursor 2, whereas the corresponding zinc complex exhibited lower flame retardant efficacy than its precursor.
|Uncontrolled Keywords (separate with ;):||Flame retardant; Polypropylene; Thermal properties; Bis-[1,3,5]triazinyl diazenes; Characterization|
|Subjects:||Physical sciences > Chemistry|
|Schools:||Faculty of Science and Technology > School of Physical Sciences and Computing|
|Deposited By:||Nuala Jones|
|Deposited On:||15 Feb 2016 17:06|
|Last Modified:||16 Mar 2017 12:29|
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