Polypropylene/polystyrene/clay blends prepared by an innovative eccentric rotor extruder based on continuous elongational flow: Analysis of morphology,rheology property,and crystallization behavior |
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| Institution: | 1. Laboratory of Plastics and Rubber Technology, Department of Physical Chemistry and Materials Science, Budapest University of Technology and Economics, H-1521 Budapest, P.O. Box 91, Hungary;2. Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, H-1519 Budapest, P.O. Box 286, Hungary;1. Laboratory of Advanced Polymers & Optimized Materials (LAPOM), Department of Materials Science and Engineering, University of North Texas, 3940 North Elm Street, Denton, TX 76207, USA;2. Encore Wire Corp., 1324 Millwood Road, McKinney, TX 75069, USA;1. Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, M?egyetem rkp. 3., H-1111 Budapest, Hungary;2. MTA–BME Research Group for Composite Science and Technology, M?egyetem rkp. 3., H-1111 Budapest, Hungary;1. Centre Català del Plàstic, Departament de Ciència dels Materials i Enginyeria Metal-lúrgica, Universitat Politècnica de Catalunya, BarcelonaTech, C/Colom 114, 08222 Terrassa, Spain;2. NUDEC SA, C/ Pintor Vila Cinca, 24-28, Pol. Ind. Can Humet de Dalt, 08213 Polinyà, Spain;1. Chemistry Department, Faculty of Science, Damietta University, Damietta, Egypt;2. Physics Department, Faculty of Science, Damietta University, Damietta, Egypt;1. College of Materials Science and Metallurgy Engineering, Guizhou University, Guiyang 550025, Guizhou, People''s Republic of China;2. National Engineering Research Center for Compounding and Modification of Polymeric Materials, Guiyang 550014, Guizhou, People''s Republic of China;3. College of Materials and Metallurgy Engineering, Guizhou Institute of Technology, Guiyang 550003, Guizhou, People''s Republic of China |
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| Abstract: | The polypropylene (PP)/polystyrene (PS)/montmorillonite (MMT) blends were prepared by an innovative eccentric rotor extruder based on continuous elongational flow. Addition of MMT nanoparticles was found to reduce the PS droplet size and improve the compatibility of PP/PS. The MMT nanoparticles had clear intercalation and/or exfoliation structures and were located mostly at the interface of PP/PS. It was found that the intercalation and exfoliation of MMT was finished under the synergy of interfacial interaction and tensile deformation so that we called the mechanism as “MMT exfoliation mechanism induced by synergy of interface and tensile deformation”. The rheological analysis showed that incorporation of MMT led to an increase in complex viscosity to an optimum level (5 wt%), after which any further increase in MMT concentration decreased the complex viscosity. Moreover, the degree of crystallinity of blends was controlled by the heterogeneous nucleation effect of MMT and the inhibition effect of PS. |
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| Keywords: | Immiscible PP/PS blends Clay Eccentric rotor extruder Continuous elongational flow Exfoliation mechanism |
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