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- W2131606316 abstract "Polylactide (PLA) and calcium carbonate (CaCO3) were melt blended using a twin-screw extruder. The morphology of PLA/CaCO3 composites was observed by scanning electronic microscopy. The linear and nonlinear shear rheological behaviors of PLA/CaCO3 melts were investigated by an advanced rheology expended system. The results show that the CaCO3 particles are evenly dispersed in the PLA matrix. The incorporation of low CaCO3 content (<20%) causes the reduction of the storage moduli, loss moduli, and dynamic viscosities whereas high CaCO3 content (>30%) leads to the increase of the storage moduli, loss moduli, and dynamic viscosities. The composites with high CaCO3 content show pseudo-solid-like behaviors at low frequency. High CaCO3 content also results in a significant increase of flow activation energy and a dramatic decrease of flow index n, which is in consistent with the more serious shear-thinning tendency of high-filled PLA composites melts. The particular rheological responses might be attributed to the formation and destruction of the percolating network. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009" @default.
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- W2131606316 date "2009-11-01" @default.
- W2131606316 modified "2023-10-05" @default.
- W2131606316 title "Structure-rheology responses of polylactide/calcium carbonate composites" @default.
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- W2131606316 doi "https://doi.org/10.1002/app.30768" @default.
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