Shear-induced structure evolution of carbon nanotubes dispersions in polyacrylonitrile–dimethylsulfoxide solution

2015 ◽  
Author(s):  
Evgeny Karpushkin ◽  
Maria Lapshina ◽  
Vladimir Sergeyev
Keyword(s):  
Carbon Nanotubes ◽  
Structure Evolution ◽  
Shear Induced Structure ◽  
Induced Structure

scholarly journals Rheological properties of hydroxypropylmethyl cellulose/sodium dodecylsulfate mixtures

2014 ◽  
Vol 79 (4) ◽  
pp. 457-468 ◽  
Author(s):  
Jaroslav Katona ◽  
Sandra Njaradi ◽  
Verica Sovilj ◽  
Lidija Petrovic ◽  
Brankica Marceta ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Sodium Dodecylsulfate ◽  
Shear Thinning ◽  
Cellulose Ether ◽  
Flow Profile ◽  
Hydroxypropylmethyl Cellulose ◽  
Shear Rates ◽  
Newtonian Liquids ◽  
Shear Induced Structure ◽  
Induced Structure

Rheological properties of mixtures of hydroxypropylmethyl cellulose (HPMC), a nonionic associative cellulose ether, and sodium dodecylsulfate (SDS), an anionic surfactant, were investigated by viscosity measurements performed at different shear rates (0.1-6000 s-1). HPMC/SDS mixtures containing different concentrations of SDS (CSDS=0.00-3.50 % w/w) and HPMC concentrations which corresponded to the overlap parameter c/c*=3, 6, and 12 were prepared. All HPMC/SDS mixtures were found to be shear-thinning when examined in a low-end-to mid-range of the applied shear rates. The degree of shear-thinning, n, and viscosity of the mixtures were influenced by composition of HPMC/SDS mixtures and HPMC-SDS complex formation. The changes in n ranged from values typical for highly shear thinning to almost perfectly Newtonian liquids, and were more pronounced as c/c* was increased from 3 to 6 and 12. A change in flow profile and a buildup of the first normal stress difference (N1) was observed in HPMC/SDS mixtures with c/c*=6 and 12 and CSDS 0.55-1.00 % and 0.55-2.50 %, respectively, when a critical shear rate, crit. was exceeded, suggesting that a shear-induced structure formation in the mixtures took place.

Influence of molecular weight on polymorphs and temperature-induced structure evolution of regioregular poly(3-dodecylthiophene)

2014 ◽  
Vol 5 (6) ◽  
pp. 1938-1944 ◽  
Author(s):  
Yan Guo ◽  
Lei Wang ◽  
Yuanyuan Han ◽  
Yanhou Geng ◽  
Zhaohui Su
Keyword(s):  
Molecular Weight ◽  
Structure Evolution ◽  
Regioregular Poly ◽  
Induced Structure

Shear-induced structure in flowing polymer melts

1986 ◽  
Vol 24 (2) ◽  
pp. 83-85 ◽  
Author(s):  
P. J. Hendra ◽  
M. A. Taylor ◽  
H. A. Willis
Keyword(s):  
Polymer Melts ◽  
Shear Induced Structure ◽  
Induced Structure
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