کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
822630 1469564 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermal and rheological properties of highly concentrated PET composites with ferrite nanoparticles
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
پیش نمایش صفحه اول مقاله
Thermal and rheological properties of highly concentrated PET composites with ferrite nanoparticles
چکیده انگلیسی

Ferrite nanoparticles were introduced into poly(ethylene terephthalate) (PET) in a melt state at 270 °C upto 20 wt%, and the thermal and rheological properties of the nanocomposites were investigated. The introduction of ferrite nanoparticles increased a little the crystallization temperature (Tc) of PET by ca. 3 °C, while it had little effect on the melting temperature (Tm). In addition, it increased both heat of crystallization (ΔHc) and heat of fusion (ΔHm) with ferrite content. PET nanocomposites with ferrite 5 wt% and above exhibited an increased thermal stability and a two-stage degradation. The dynamic viscosity of PET nanocomposites was increased with ferrite content. However, ferrite loading of 5 wt% and above produced a high degree of shear thinning leading to even lower viscosity in a high frequency range than that of pure PET. The nanocomposites gave a non-zero positive value of yield stress, which was notably increased particularly from 5 wt% loading. In the Cole–Cole plot, at contents 1 wt% and above, ferrite nanoparticles caused the deviation from the master curve and a reduced slope. In addition, the relaxation time was increased with ferrite content and an increasing degree was more notable at a lower frequency.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Science and Technology - Volume 67, Issues 7–8, June 2007, Pages 1348–1352
نویسندگان
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