Non‐Isothermal Rheological Response During Elongational Flow

1977 ◽  
Vol 21 (4) ◽  
pp. 453-468 ◽  
Author(s):  
Takayoshi Matsumoto ◽  
Donald C. Bogue
Keyword(s):  
Elongational Flow ◽  
Rheological Response

scholarly journals Structure–Property Relationships in Bionanocomposites for Pipe Extrusion Applications

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 782
Author(s):  
Luigi Botta ◽  
Francesco Paolo La Mantia ◽  
Maria Chiara Mistretta ◽  
Antonino Oliveri ◽  
Rossella Arrigo ◽  
...  
Keyword(s):  
Low Frequency ◽  
Elongational Flow ◽  
Structure Property ◽  
Remarkable Effect ◽  
Suitable Material ◽  
Rheological Response ◽  
Structure Property Relationships ◽  
Potential Alternative ◽  
Pipe Extrusion ◽  
Material Ductility

In this work, bionanocomposites based on different biodegradable polymers and two types of nanofillers, namely a nanosized calcium carbonate and an organomodified nanoclay, were produced through melt extrusion, with the aim to evaluate the possible applications of these materials as a potential alternative to traditional fossil fuel-derived polyolefins, for the production of irrigation pipes. The rheological behavior of the formulated systems was thoroughly evaluated by exploiting different flow regimes, and the obtained results indicated a remarkable effect of the introduced nanofillers on the low-frequency rheological response, especially in nanoclay-based bionanocomposites. Conversely, the shear viscosity at a high shear rate was almost unaffected by the presence of both types of nanofillers, as well as the rheological response under nonisothermal elongational flow. In addition, the analysis of the mechanical properties of the formulated materials indicated that the embedded nanofillers increased the elastic modulus when compared to the unfilled counterparts, notwithstanding a slight decrease of the material ductility. Finally, the processing behavior of unfilled biopolymers and bionanocomposites was evaluated, allowing for selecting the most suitable material and thus fulfilling the processability requirements for pipe extrusion applications.

scholarly journals Effect of interaction enhancement on rheological response of polypropylene /polybutadiene blend composites

2021 ◽  
Vol 96 ◽  
pp. 107069
Author(s):  
Yuguang Liu ◽  
Bo Tian ◽  
Xinyang Liu
Keyword(s):  
Rheological Response

A Continuous Lubricated Squeezing Flow Technique to Study the Rheological Behavior of Polymer Melts in Equibiaxial Elongational Flow

2008 ◽  
Author(s):  
David Venerus ◽  
Teresita Guadarrama-Medina ◽  
Tai-Yi Shiu ◽  
Albert Co ◽  
Gary L. Leal ◽  
...  
Keyword(s):  
Rheological Behavior ◽  
Polymer Melts ◽  
Elongational Flow ◽  
Squeezing Flow ◽  
Lubricated Squeezing Flow

Shear degradation resistance of star poly(ethyleneimine) - polyacrylamides during elongational flow

e-Polymers ◽  
2011 ◽  
Vol 11 (1) ◽  
Author(s):  
Ming Duan ◽  
Shenwen Fang ◽  
Liehui Zhang ◽  
Fuxiao Wang ◽  
Peng Zhang ◽  
...  
Keyword(s):  
Shear Rate ◽  
Aqueous Solutions ◽  
Relative Viscosity ◽  
Reduction Rate ◽  
Elongational Flow ◽  
Exponential Dependence ◽  
Distilled Water ◽  
Shear Stability ◽  
Low Viscosity ◽  
Shear Degradation

AbstractAn experimental study of the flow-induced scission behaviour of four star hydrolyzed polyacrylamides (HPMA) with different arms during planar elongational flow in a cross-slot flow cell is described. The results showed that the shear stability of linear HPAM in distilled water was not essentially different from star HPAM. Polymer scission was not observed in either system in a shear rate range from 20,000 to 100,000s-1, which can be attributed to the strong polyelectrolyte behaviour of HPAM in distilled water. However, at the same shear rate, the star HPAMs exhibited superior shear stability in comparison to the linear HPAMs in aqueous solutions containing NaCl (CNaCl=0.2-1.0%wt) and, in particular, the initial reduction rate of relative viscosity (R) decreased with the degree of branching of the HPAMs. In addition, it was found that the R of five HPAMs in NaCl aqueous solutions exhibited an exponential dependence on shear rate, in which the coefficient C1 can be used to quantitatively evaluate shear stability. In star HPAM NaCl aqueous solutions, the increase of R with shear rate is very likely due to the decrease of the hydrodynamic radius (Rh) of these HPAMs, while the increase of R with NaCl concentrations can be attributed to the relatively low viscosity of these polymers at high NaCl concentrations.

Preparation of Super-toughened Poly(L-lactide) Composites under Elongational Flow: A Strategy for Balancing Stiffness and Ductility

2021 ◽  
pp. 108758
Author(s):  
Zhi-Tao Yang ◽  
Ju-Xin Yang ◽  
Jin-Hua Fan ◽  
Yan-Hong Feng ◽  
Zhao-Xia Huang
Keyword(s):  
Elongational Flow

scholarly journals Association behavior of binary polymer mixtures under elongational flow

2000 ◽  
Vol 113 (11) ◽  
pp. 4814-4826 ◽  
Author(s):  
Elena E. Dormidontova ◽  
Gerrit ten Brinke
Keyword(s):  
Elongational Flow ◽  
Polymer Mixtures ◽  
Binary Polymer ◽  
Association Behavior

Effect of Elongational Flow and Polarity of Organomodified Clay on Morphology and Mechanical Properties of a PLA Based Nanobiocomposite

2016 ◽  
Vol 31 (5) ◽  
pp. 541-547 ◽  
Author(s):  
F. P. La Mantia ◽  
M. Ceraulo ◽  
M. C. Mistretta ◽  
F. Sutera ◽  
L. Ascione ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Elongational Flow ◽  
Morphology And Mechanical Properties
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