Using creeping squeeze flow to obtain low-frequency linear viscoelastic properties: Low-shear rate measurements on polydimethylsiloxane

2002 ◽  
Vol 46 (4) ◽  
pp. 817 ◽  
Author(s):  
Edwin C. Cua ◽  
Montgomery T. Shaw
Keyword(s):  
Shear Rate ◽  
Viscoelastic Properties ◽  
Low Frequency ◽  
Squeeze Flow ◽  
Linear Viscoelastic ◽  
Low Shear

Viscometer for low frequency, low shear rate measurements

1986 ◽  
Vol 57 (8) ◽  
pp. 1667-1672 ◽  
Author(s):  
Robert F. Berg ◽  
Michael R. Moldover
Keyword(s):  
Shear Rate ◽  
Low Frequency ◽  
Low Shear

scholarly journals Epitaxial Crystallization of Poly(ε-caprolactone) on Reduced Graphene Oxide at a Low Shear Rate by In Situ SAXS/WAXD Methods

ACS Omega ◽  
2020 ◽  
Vol 5 (49) ◽  
pp. 31535-31542
Author(s):  
Weijun Miao ◽  
Feng Wu ◽  
Shiman Zhou ◽  
Guibin Yao ◽  
Yiguo Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Shear Rate ◽  
Reduced Graphene Oxide ◽  
Epitaxial Crystallization ◽  
Reduced Graphene ◽  
Low Shear

Preparation, Characterization and Processing of PCL/PHO Blends by 3D Bioplotting

2020 ◽  
Vol 35 (5) ◽  
pp. 458-470
Author(s):  
S. Gopi ◽  
B. A. Ramsay ◽  
J. A. Ramsay ◽  
M. Kontopoulou
Keyword(s):  
Viscoelastic Properties ◽  
Biomedical Applications ◽  
Synergistic Effects ◽  
Thermal And Mechanical Properties ◽  
Flow Properties ◽  
Immiscible Blends ◽  
Melt Compounding ◽  
Linear Viscoelastic ◽  
Matrix Morphology ◽  
Good Flow

Abstract Blends of polycaprolactone (PCL) and poly(3-hydroxyoctanoate) P(3HO) were prepared by melt compounding. These immiscible blends exhibited droplet-matrix morphology at compositions up to 30 wt% P(3HO). Even though the addition of amorphous P(3HO) decreased the crystallinity of PCL, the crystallization temperature of the blends increased by 6 to 7 8C. Blends containing up to 30 wt% P(3HO) had higher crystallization rates, and lower crystallization half-times compared to neat PCL. The viscosity of PCL decreased upon addition of P(3HO), making the blends suitable for processing using a 3D bioplotter. Compositions with 10 to 30 wt% P(3HO) were ideal for processing, because of their improved crystallization kinetics, reduced stickiness and good flow properties. Estimation of the interfacial tension by fitting the Palierne model to the linear viscoelastic properties of the blends revealed good compatibility, which gave rise to synergistic effects in the thermal and mechanical properties. The fibres prepared by 3D bioplotting maintained droplet matrix morphology, with finer particle size than the original compounded material. In addition to favourable viscosity and thermal properties, the extruded fibres containing 30 wt% P(3HO) had comparable modulus to the neat PCL, while exhibiting good ductility. These blends may be suitable alternatives to PCL for biomedical applications, because they provide a range of crystallinities, crystallization rates and viscosities.

Formation of cylindrite structures in shear-induced crystallization of isotactic polypropylene at low shear rate

Polymer ◽  
2007 ◽  
Vol 48 (4) ◽  
pp. 1105-1115 ◽  
Author(s):  
Chenggui Zhang ◽  
Haiqing Hu ◽  
Xiaohong Wang ◽  
Yonghua Yao ◽  
Xia Dong ◽  
...  
Keyword(s):  
Shear Rate ◽  
Isotactic Polypropylene ◽  
Induced Crystallization ◽  
Low Shear
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