Rheology of Nanosilica-Compatibilized Immiscible Polymer Blends: Formation of a 'Heterogeneous Network' Facilitated by Interfacially Anchored Hybrid Nanosilica
| Autor: | Hengti Wang, Xuewen Zhao, Xin Yang, Jingye Li, Zhiang Fu, Yongjin Li |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Polymers and Plastics Organic Chemistry Percolation threshold 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Small amplitude 01 natural sciences Viscoelasticity 0104 chemical sciences Inorganic Chemistry Oscillatory shear Rheology Polymer chemistry Materials Chemistry Polymer blend Janus Composite material 0210 nano-technology |
| Zdroj: | Macromolecules. 50:9494-9506 |
| ISSN: | 1520-5835 0024-9297 |
| DOI: | 10.1021/acs.macromol.7b02143 |
| Popis: | Exclusive localization of nanofillers at the interface of immiscible polymer blend has been confirmed to be effective in improving compatibility and facilitating the formation of nanofiller-network with very low percolation threshold, while the rheology of such nanofiller compatibilized blends has seldom been investigated. Herein, we present a systematic rheological study on nanosilica-compatibilized PVDF/PLLA (poly(vinylidene fluoride)/poly(l-lactide)) blends. The linear viscoelastic properties of the systems are evaluated using small amplitude oscillatory shear (SAOS). It is found that the interfacial jammed Janus grafted silica (JGS) located at the interface increases dynamic moduli at low frequency even with very low filler loadings. The nonterminal effects become more pronounced with increasing JGS loadings. Weighted relaxation spectra inferred from SAOS reveals that the shape relaxation of PVDF-droplets is strongly influenced by addition of JGS. The solid-like behavior of JGS-filled blends has been ... |
| Databáze: | OpenAIRE |
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