Influence of stretching induced self-concentration and self-dilution on coil-stretch hysteresis and capillary thinning of unentangled polymer solutions

2016 ◽  
Vol 60 (3) ◽  
pp. 345-366 ◽  
Author(s):  
R. Prabhakar ◽  
S. Gadkari ◽  
T. Gopesh ◽  
M. J. Shaw
Keyword(s):  
Polymer Solutions ◽  
Capillary Thinning

scholarly journals Direct-Write Drawing of Carbon Nanotube/Polymer Composite Microfibers

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Scott M. Berry ◽  
Santosh Pabba ◽  
Robert W. Cohn ◽  
Robert S. Keynton
Keyword(s):  
Carbon Nanotube ◽  
Polymer Solutions ◽  
Fiber Diameter ◽  
Axial Strain ◽  
Polymer Concentration ◽  
Strain Rates ◽  
Direct Write ◽  
Composite Fibers ◽  
Capillary Thinning ◽  
Doped Polymer

Carbon-nanotube- (CNT-) doped polymer solutions were drawn into arrays of microfibers using a novel direct-write process. This process utilizes a micromanipulator-controlled syringe loaded with solvated polymer mixed with CNTs to “write” networks of composite fibers with precisely positioned endpoints. The diameters of these composite fibers are correlated to the degree of capillary thinning that occurs prior to the solidification of the directly written CNT-doped solution filament. The fibers had diameters ranging from 7 μm to over 100 μm and possessed conductivities as high as 0.1 Sm−1. Fiber diameter was found to increase with increasing polymer concentration and decreasing fiber length and can be controlled through modulation of these parameters. The presence of CNTs was found not to significantly affect fiber diameter, despite the CNTs significant effect on viscosity, which was previously reported to influence diameter. This discrepancy is likely related to the non-Newtonian effects of CNT/polymer solutions, including an apparent shear thinning at increasing axial strain rates.

Experimental study on the capillary thinning of entangled polymer solutions

2014 ◽  
Vol 53 (9) ◽  
pp. 725-739 ◽  
Author(s):  
Dirk Sachsenheimer ◽  
Bernhard Hochstein ◽  
Norbert Willenbacher
Keyword(s):  
Experimental Study ◽  
Polymer Solutions ◽  
Capillary Thinning ◽  
Entangled Polymer ◽  
Entangled Polymer Solutions

Scaling approach to dilferential swelling of polymer solutions and gels

1994 ◽  
Vol 4 (10) ◽  
pp. 1677-1685 ◽  
Author(s):  
P. Pekarski ◽  
Y. Rabin ◽  
M. Gottlieb
Keyword(s):  
Polymer Solutions

Hydrodynamics of polymer solutions via two-parameter scaling

1994 ◽  
Vol 4 (8) ◽  
pp. 1299-1310 ◽  
Author(s):  
Ralph H. Colby ◽  
Michael Rubinstein ◽  
Mohamed Daoud
Keyword(s):  
Polymer Solutions ◽  
Two Parameter
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