Publications by authors named "Raul Andres Becerra-Arciniegas"
Article Synopsis
- The study describes the synthesis of a new ionomer called poly(alkylene biphenyl butyltrimethyl ammonium) (ABBA), which has a distinctive structure with no C-O-C bonds and incorporates quaternary ammonium groups.
- The synthesis involved a series of chemical reactions, including metalation with -butyllithium and quaternization using trimethylamine, with H-NMR spectroscopy confirming the successful modifications at each step.
- The final ionomer was tested for its properties when blended with poly(vinyl alcohol) and poly(vinylidene difluoride), showing higher water uptake and ionic conductivity in the PVDF blend, likely due to improved nanophase separation.
In this work we report the synthesis of poly(vinylbenzylchloride-co-hexene) copolymer grafted with N,N-dimethylhexylammonium groups to study the effect of an aliphatic backbone without ether linkage on the ionomer properties. The copolymerization was achieved by the Ziegler-Natta method, employing the complex ZrCl (THF) as a catalyst. A certain degree of crosslinking with N,N,N',N'-tetramethylethylenediamine (TEMED) was introduced with the aim of avoiding excessive swelling in water.
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- The study focused on improving the working temperature and durability of short side chain perfluorosulfonic acid (SSC-PFSA) Aquivion membranes through a thermal annealing process.
- The Ionomer n Analysis (INCA method) was used to assess the thermal and mechanical properties, revealing increased crystallinity and enhanced polymer stability after annealing.
- Measurements confirmed that the annealing increased the stiffness of the membranes across a range of temperatures, leading to significant thermal and mechanical improvements in both extruded and cast membranes.
We synthesized anion exchange polymers by a reaction of chloromethylated poly(2,6-dimethyl-1,4-phenylene)oxide (PPO) with strongly basic 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD).
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