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Hyperbranched polymers as modifiers of epoxy adhesives
Affiliation:1. National Research Council, Institute for Composite and Biomedical Materials, P.le Tecchio 80, 80125 Naples, Italy;2. Technological District, IMAST Scarl, Piazza Bovio 22, 80133 Naples, Italy;1. Department of Analytical and Organic Chemistry, Universitat Rovira i Virgili, C/ Marcel·lí Domingo s/n, 43007 Tarragona, Spain;2. Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Strasse 6, Dresden 01069, Germany;3. Technische Universität Dresden, 01062 Dresden, Germany;4. Thermodynamics Laboratory, ETSEIB Universitat Politècnica de Catalunya, Av. Diagonal 647, 08028 Barcelona, Spain;1. Department of Environmental Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran;2. Department of Nanomaterials and Nanocoatings, Institute for Color Science and Technology, P.O. Box 16765-654, Tehran, Iran;3. Faculty of Chemistry and Petrochemical Engineering, Standard Research Institute (SRI), P.O. Box 31745-139, Karaj, Iran;4. Faculty of Chemistry, Kharazmi University, P.O. Box 15719-14911, Tehran, Iran;5. School of Chemical Engineering, College of Engineering, University of Tehran, P.O. Box: 11155-4563, Tehran, Iran;6. University of Perugia, Department of Civil and Environmental Engineering, Strada di Pentima 4, 05100, Terni, Italy;7. Université de Lorraine, Laboratoire MOPS E.A. 4423, Metz F-57070, France;8. Center of Innovation and Research in Materials & Polymers (CIRMAP), Laboratory of Polymeric and Composite Materials (LPCM), University of Mons UMONS & Materia Nova Research Center, Place du Parc 20, 7000 Mons, Belgium;9. Department of Polymer Processing, Iran Polymer and Petrochemical Institute, P.O. Box: 14965-115, Tehran, Iran;10. Department of Resin and Additives, Institute for Color Science and Technology, P.O. Box 16765-654, Tehran, Iran;1. Department of Analytical and Organic Chemistry, Universitat Rovira i Virgili, C/ Marcel·lí Domingo s/n, 43007 Tarragona, Spain;2. Centre Tecnològic de la Química de Catalunya, CTQC, C/ Marcel·lí Domingo s/n, 43007 Tarragona, Spain;3. Department of Mechanical Engineering, Universitat Rovira i Virgili, C/ Països Catalans, 26, 43007 Tarragona, Spain;4. Thermodynamics Laboratory, ETSEIB Universitat Politècnica de Catalunya, Av. Diagonal 647, 08028 Barcelona, Spain;1. Institute of Condensed Matter and Nanosciences, Bio & Soft Matter (IMCN/BSMA), Université catholique de Louvain, 1 Place Croix du Sud, Box: L7.04.02, 1348, Louvain-la-Neuve, Belgium;2. Institute of Mechanics, Materials and Civil Engineering, Materials and Process Engineering, Université catholique de Louvain, Place Sainte Barbe 2, 1348, Louvain-la-Neuve, Belgium;1. Western Washington University, 516 High Street, Bellingham, WA, 98225, USA;2. The University of Southern Mississippi, 118 College Drive, Hattiesburg, MS 39406, USA;3. Liaoning Normal University, Huanghe Road, Shahekou, Dalian, Lianoning, China;1. Institute of Physics and Chemistry, Federal University of Itajubá, Ave BPS 1303, Itajubá, 37500-903 MG, Brazil;2. Faculty of Engineering Guaratinguetá, Universidade Estadual Paulista, Ave. Dr. Ariberto Pereira da Cunha 333, Guaratinguetá, 12516-410 São Paulo, SP, Brazil;3. Paulista State University, Institute of Chemistry, Rua Francisco Degni, 55, Quitandinha, 14801-907 Araraquara, SP, Brazil
Abstract:A novel hyperbranched poly(amide-ester)s (HBP) has been synthesized through the AB2 approach in one-step polycondensation without solvents. The synthesized HBP has been characterized and used as filler for epoxy resin with the aim obtain materials which exhibit improved toughness. Composites containing 6% and 12% wt/wt of HBP in diglycidylether of bisphenol A (DGEBA) were produced and characterized. Results obtained from DMA tests showed that HBP has good compatibility with the epoxy resin. Impact tests proved that composites containing 12% HBP showed an improvement of about 25% on impact strength with respect to neat DGEBA. Moreover, adhesive properties were evaluated in terms of the lap-shear strength value of composite joints bonded using the investigated blend. Results showed an improvement of shear strength value of DGEBA added with 12% HBP with respect to neat DGEBA. The water uptake behavior was also evaluated.
Keywords:A  Polymer–matrix composites (PMCs)  B  Adhesion  B  Fracture toughness  Hyperbranched
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