Morphological evolution of polypropylene/polystyrene blends in a twin‐screw extruder |
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| Authors: | Yang Wu Shaowei Jing Qun Gu Binyao Li |
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| Affiliation: | 1. Institute of Polymers, Nanchang University, 999 Xuefu Ave, Nanchang 330031, People's Republic of China;2. Ningbo Key Laboratory of Polymer Materials, Polymer and Composites Division, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, People's Republic of China;3. 94th Hospital of People's Liberation Army, Nanchang 330002, People's Republic of China;4. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People's Republic of China |
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| Abstract: | The effects of the blend composition and rotation speed on the morphological evolution of polypropylene (PP)/polystyrene (PS) blends were investigated in a twin‐screw extruder. When PS was the major component, the rate of melt and the rate of dispersion played final roles in the morphological development of the polymer melts. However, when PP was the major component, the rate of dispersion and the rate of coalescence played key roles. A high tendency to coalesce occurred at a high rotation speed and/or a high content of the dispersed phase. When the PP/PS blend composition was close to 1, a cocontinuous morphology was observed to transmute into a coarse one with increasing rotation speed. Attempts were made to correlate the morphology and mechanical properties. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011 |
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| Keywords: | blends mechanical properties morphology |
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