Large impact in electrical properties of polypropylene by improving the filler-matrix interface effect in PP/PS blends |
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| Institution: | 1. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People''s Republic of China;2. University of Chinese Academy of Sciences, Beijing 100049, People''s Republic of China;3. Department of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, People''s Republic of China;1. BAM Federal Institute for Materials Research and Testing, Unter den Eichen 87, 12005 Berlin, Germany;2. University of Applied Sciences Berlin, Luxemburger Str.10, 13353 Berlin, Germany;1. Center for Advanced Materials, Qatar University, Doha 2713, Qatar;2. Materials Science and Technology Program, College of Arts and Sciences, Qatar University, Doha 2713, Qatar;3. Qatar Petrochemical Company (QAPCO), Doha 756, Qatar;1. Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang, Jiangsu, 212013, China;2. Beijing Institute of Aeronautical Materials, Beijing, 100095, China;1. Department of Polymer Engineering, The University of Akron, Akron, OH 44325, USA;2. Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA;1. Friedrich-Alexander-University Erlangen-Nürnberg, Institute of Polymer Technology, Am Weichselgarten 9, D-91058 Erlangen, Germany;2. Central South University, State Key Laboratory of High Performance and Complex Manufacturing, Lushan South Road 932, 410083 Changsha, China;1. Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, PR China;2. Engineering Research Center of Elastomer Materials Energy Conservation and Resources, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, PR China;3. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing University of Chemical Technology, Beijing 100029, PR China;4. Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, PR China |
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| Abstract: | Inorganic nanoparticles are widely used to improve space charge behavior, DC breakdown strength and other electrical properties of polymer insulating materials, but the uniform distribution of inorganic nanofillers in matrix is difficult due to their agglomeration and bad compatibility with the polymeric matrix. In this paper, polypropylene (PP)/polystyrene (PS) blends were prepared to suppress space charge accumulation and improve DC breakdown strength. Polypropylene-g-polystyrene (PP-g-PS) graft copolymer was used as compatibilizer to improve the compatibility of PP matrix and PS filler. The evolution of microstructure of PP/PS blends were investigated by scanning electron microscope (SEM), the space charge distributions were measured by a pulsed electro-acoustic (PEA) system, and DC breakdown strength was also tested. The morphologies show that the size of PS particles reduced to 310 nm when the content of PP-g-PS graft copolymer increased to 24 wt%, and the interaction between PP matrix and PS particles enhanced. The presence of PS particles in all PP/PS blends suppressed the space charge accumulation compared to neat PP, but the DC breakdown strength in uncompatibilized blend was lower than neat PP. The increasing of content of PP-g-PS improved the DC breakdown strength with the maximum value of 408.9 kV/mm was obtained. This may attribute to excellent interface structure formed between PP matrix and PS particles. |
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| Keywords: | Interface PP/PS blend Space charge distribution DC breakdown strength |
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