Crystalline and spectroscopic characterization of poly(2-aminoethyl methacrylate hydrochloride) chains grafted onto poly[(R)-3-hydroxybutyric acid] |
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| Institution: | 1. Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Campus Juriquilla, Boulevard Juriquilla 3001, Santiago de Querétaro, Querétaro C.P 76230, Mexico;2. Departamento de Química de Radiaciones y Radioquímica del Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Apartado, Postal 70-543, México, D.F. 04510 Mexico;3. Universidad del Valle de México, Boulevard Villas del Mesón 1000, Provincia Juriquilla, Campus Querétaro, Santiago de Querétaro, Querétaro, C.P 76230, Mexico;1. Key Laboratory of Structure-Based Drugs Design & Discovery (Shenyang Pharmaceutical University) of Ministry of Education, Shenyang 110016, PR China;2. Department of Organic Chemistry, School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang 110016, PR China;3. Institute of Drug Research in Medicine Capital of China (Shenyang Pharmaceutical University), Benxi 117000, PR China;4. School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, PR China;1. Institute of Macromolecular Chemistry, v.v.i., Academy of Sciences of the Czech Republic, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic;2. Supramolecular Chemistry Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, B-9000 Ghent, Belgium;3. Institute of Biophysics and Informatics, First Faculty of Medicine, Charles University in Prague, Salmovska 1, 120 00 Prague 2, Czech Republic;1. Materials Science and Technology of Polymers, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands;2. Laboratory for Surface Technology and Tribology, Engineering Technology, University of Twente, Enschede, The Netherlands;3. Wells R&D, Innovation, Research & Development, Shell Global Solutions International BV, Rijswijk, The Netherlands;1. Institute for Macromolecular Chemistry of the Albert-Ludwigs-University Freiburg, Stefan-Meier Strasse 31, D-79104 Freiburg, Germany;2. Freiburg Materials Research Center, FMF, of the Albert-Ludwigs-University, Stefan-Meier-Strasse 21, D-79104 Freiburg, Germany;3. JONAS – Joint Research Network on Advanced Materials and Systems, Advanced Materials & Systems Research, BASF SE, Carl-Bosch-Strasse 38, 67056 Ludwigshafen, Germany |
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| Abstract: | The present study is aimed to investigate the degree of crystallinity of poly(3-hydroxybutyrate) P(3HB) grafted with poly(2-aminoethyl methacrylate hydrochloride) (PAEMA) chains using WAXS, micro Raman, and FTIR spectroscopy. The samples were obtained by radiation induced graft polymerization of the monomer in the substrate using different solvents for comparison. The results of crystallinity are consistent with those obtained of lower crystallinity in grafting copolymer relative to the substrate P(3HB). The low crystallinity is directly related to the increase of the degree of grafting, meaning that although the P(3HB) amorphous region is grafted, the crystalline zone is also affected in some extent by the grafting process and the environment of the new molecule. Three different methods were surveyed to determine the variation of crystallinity degree with the grafting degree. It is shown that all methods provide linear relationships between these variables, but WAXS method was found more acceptable than the others (FTIR and Raman). A detailed characterization of the vibrational bands characteristic of amorphous and helical crystalline structure of the grafting copolymers are also highlighted. |
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| Keywords: | Crystallinity degree Poly(3-hydroxybutyrate) 2-Aminoethyl methacrylate hydrochloride Raman FTIR WAXS |
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