Dynamic rheology and morphology of HDPE‐fumed silica composites: Effect of interface modification |
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| Authors: | Sangita Nandi Sanjukta Bose Susanta Mitra Anup K Ghosh |
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| Affiliation: | 1. GE India Technology Centre Pvt. Ltd., SABIC Innovative Plastics Program, Polymer Science & Technology Department, 122 EPIP Phase II, Bangalore 560066, India;2. Centre for Polymer Science and Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India |
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| Abstract: | In the present study, high density polyethylene (HDPE)‐based composites containing different amounts of fumed silica (FS) were prepared by melt compounding in a corotating twin screw extruder. Polyethylene‐g‐maleic anhydride copolymer (PE‐g‐MA) containing 1 wt% maleic anhydride was used for interface modification between filler and polymer. The interaction between the surface hydroxyl groups of fumed silica nanoparticles with maleic anhydride groups of PE‐g‐MA led to a finer dispersion of the filler in the HDPE matrix. The terminal complex viscosity and terminal storage modulus were highest at 1 wt% filler loading due to widely spread network formation by FS nanoparticles. This filler network plausibly got disturbed at higher filler content and/or interface modification which was reflected in their stress relaxation behavior also. The dynamic rheological behavior of the composites was explained in terms of morphological observations. POLYM. ENG. SCI., 2013. © 2012 Society of Plastics Engineers |
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