Synthesis and Characterization of a Branched Poly(Methacrylamide): Thermal Stability and Molecular Simulation Studies of Their Blends With Vinylic Polymers |
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| Authors: | Nancy Alvarado Luz Alegría Claudia Sandoval Galder Kortaberría Angel Leiva Ligia Gargallo |
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| Affiliation: | 1. Departamento Química Fisica, Facultad de Química, Pontificia Universidad Católica de Chile, Casilla 306, Santiago 22, Chile;2. Centro de Docencia de Ciencias Básicas para Ingeniería, Facultad de Ciencias de la Ingeniería, Universidad Austral de Chile, Casilla 567, Valdivia, Chile;3. Universidad Andrés Bello, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias Biológicas, Av. República 239, Santiago, Chile;4. Group “Material+Technologies”, Departamento Ingeniería Química y M. Ambiente, Escuela Politécnica, Universidad del País Vasco/Euskal Herriko Unibersitatea, Plaza Europa 1, 20018 Donostia, San Sebastián, Espa?a;5. Universidad de Tarapacá, General Velásquez 1775, Arica, Chile |
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| Abstract: | The synthesis of a poly(diethylaminoethyl methacrylamide) (BP), based on a lineal methacrylamide with diethylaminoethyl branches was carried out. Thermal behavior was studied by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Relatively high thermal stability is found. Blends with poly(methylmethacrylate) (PMMA), poly(acrylic acid) (PAA) and poly(monomethyl itaconate) (PMMI) were prepared. Their thermal properties in blends were studied together with miscibility, in order to improve thermal properties of vinylic polymer blends. An increase of thermal stability was found for certain blend compositions. By FTIR analysis, higher band displacements were found for low BP compositions. AFM and molecular simulation analysis were carried out in order to elucidate the structural origin leading to thermal stability and miscibility increases. Hydrophobic interactions among methyl end groups of BP and methylene groups of vinylic polymers should be the responsible of miscibility and thermal stability increases. |
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| Keywords: | Polymer blend branched polymers molecular simulation thermal stability atomic force microscopy (AFM) |
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