Interfacially modified LDPE/GTR composites with non-polar elastomers: From microstructure to macro-behavior |
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| Institution: | 1. Department of Polymer Technology, Faculty of Chemistry, G. Narutowicza Str. 11/12, Gdansk University of Technology, 80-233 Gdansk, Poland;2. Department of Material Engineering, Central Mining Institute, Pl. Gwarkow 1, 40-166 Katowice, Poland;3. Department of Resin and Additives, Institute for Color Science and Technology, P.O. Box 16765-654, Tehran, Iran;1. Department of Polymer Technology, Chemical Faculty, Gdansk University of Technology, 80-233 Gdansk, G. Narutowicza Str. 11/12, Poland;2. Department of Chemical and Process Engineering, Chemical Faculty, Gdansk University of Technology, 80-233 Gdansk, G. Narutowicza Str. 11/12, Poland;1. Department of Polymer Technology, Faculty of Chemistry, Gdansk University of Technology, Gdansk, Poland;2. Renewable Energy Department, The Szewalski Institute of Fluid-Flow Machinery, Polish Academy of Sciences, Gdansk, Poland;3. Department of Chemical Engineering, Universitat Politècnica de Catalunya Barcelona Tech, Terrassa, Spain;4. Department of Resin and Additives, Institute for Color Science and Technology, Teheran, Iran;1. Department of Polymer Technology, Faculty of Chemistry, Gdansk University of Technology, Gdansk, Poland;2. Renewable Energy Department, The Szewalski Institute of Fluid-Flow Machinery, Polish Academy of Sciences, Gdansk, Poland;3. Department of Resin and Additives, Institute for Color Science and Technology, Teheran, Iran;1. Research Institute of Polymer Materials, Shanghai Jiao Tong University, Shanghai 200240, PR China;2. Department of Material Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, PR China;1. Department of Polymer Technology, Faculty of Chemistry, G. Narutowicza Str. 11/12, Gdańsk University of Technology, 80-233 Gdansk, Poland;2. Universitat Politècnica de Catalunya Barcelona Tech, Department of Chemical Engineering, Colom 1, 08222 Terrassa, Barcelona, Spain;3. Department of Resin and Additives, Institute for Color Science and Technology, P.O. Box: 16765-654, Teheran, Iran |
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| Abstract: | This paper provides some new insights into the mechanism of interaction and modifications in thermoplastic composites based on low density polyethylene (LDPE), ground tire rubber (GTR) and non-polar elastomer. The composites were prepared using a co-rotating twin-screw extruder at variable LDPE/GTR ratio and constant elastomer content. Two types of commercial elastomer were applied: styrene-butadiene-styrene (SBS) block copolymers (Kraton®) with different topologies (linear/branched) and partially cross-linked butyl rubbers (Kalar®) with different Mooney viscosities. Processing characteristics, static mechanical properties (tensile strength, elongation at break, hardness), dynamic mechanical properties, thermal properties and morphology of the resulting thermoplastic composites were investigated. Microstructure analysis shows that modification of LDPE/GTR composites with non-polar elastomers caused encapsulation of GTR particles within the elastomer phase. This phenomenon has significant influence on macro-behavior of thermoplastic composites based on LDPE/GTR blends. The results indicate that SBS copolymer improves interfacial interactions between GTR and LDPE, which enhances mechanical and thermal properties of the composites. On the other hand, cross-linked butyl rubber showed partial compatibility with LDPE and low compatibility with GTR particles. |
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| Keywords: | Ground tire rubber Recycling Thermoplastic composites Interfacial adhesion Extrusion |
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