Dynamic rheological behavior and morphology of poly(trimethylene terephthalate)/poly(ethylene octene) copolymer blends

2010 ◽  
Vol 115 (2) ◽  
pp. 1015-1021 ◽  
Author(s):  
Wei-Ang Luo ◽  
Guobin Yi ◽  
Jin Yang ◽  
Zhengfu Liao ◽  
Xudong Chen ◽  
...  
Keyword(s):  
Rheological Behavior ◽  
Copolymer Blends ◽  
Ethylene Octene Copolymer ◽  
Dynamic Rheological Behavior ◽  
Trimethylene Terephthalate ◽  
Poly Ethylene

Concentration effects on the isolation and dynamic rheological behavior of cellulose nanofibers via ultrasonic processing

Cellulose ◽  
2013 ◽  
Vol 20 (1) ◽  
pp. 149-157 ◽  
Author(s):  
Peng Chen ◽  
Haipeng Yu ◽  
Yixing Liu ◽  
Wenshuai Chen ◽  
Xiaoqing Wang ◽  
...  
Keyword(s):  
Rheological Behavior ◽  
Cellulose Nanofibers ◽  
Ultrasonic Processing ◽  
Concentration Effects ◽  
Dynamic Rheological Behavior

scholarly journals Influence of Oxidation Degree of Graphene Oxide on the Shear Rheology of Poly(ethylene glycol) Suspensions

Fluids ◽  
2020 ◽  
Vol 5 (2) ◽  
pp. 41 ◽  
Author(s):  
Yago Soares ◽  
Elyff Cargnin ◽  
Mônica Naccache ◽  
Ricardo Andrade
Keyword(s):  
Graphene Oxide ◽  
Rheological Behavior ◽  
Structural Characteristics ◽  
Rheological Characterization ◽  
Polymeric Liquid ◽  
Oxidation Degree ◽  
Force Microscopy ◽  
Fluid Behavior ◽  
Atomic Force ◽  
Poly Ethylene

This work studies the influence of the concentration and oxidation degree on the rheological behavior of graphene oxide (GO) nanosheets dispersed on polyethylene glycol (PEG). The rheological characterization was fulfilled in shear flow through rotational rheometry measurements, in steady, transient and oscillatory regimes. Graphene oxide was prepared by chemical exfoliation of graphite using the modified Hummers method. The morphological and structural characteristics originating from the synthesis were analyzed by X-ray diffraction, Raman spectroscopy, thermogravimetric analysis, Fourier transform infrared spectroscopy, and atomic force microscopy. It is shown that higher oxidation times increase the functional groups, which leads to a higher dispersion and exfoliation of GO sheets in the PEG. Moreover, the addition of GO in a PEG solution results in significant growth of the suspension viscosity, and a change of the fluid behavior from Newtonian to pseudoplastic. This effect is related to the concentration and oxidation level of the obtained GO particles. The results obtained aim to contribute towards the understanding of the interactions between the GO and the polymeric liquid matrix, and their influence on the suspension rheological behavior.

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