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Camphene/polystyrene solutions: A rheological approach for material processing industry
Author(s) -
Felix Manuel,
PerezPuyana Victor,
Paúl Antonio,
Sepúlveda Ranier
Publication year - 2019
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.47953
Subject(s) - camphene , rheology , polystyrene , rheometer , materials science , shear thinning , chemical engineering , polymer , composite material , shear (geology) , polymer chemistry , chemistry , chromatography , essential oil , engineering
ABSTRACT Rheological properties of polymer–camphene solutions are very relevant as they affect their stability, and they have many implications in operation costs. This work elucidates the rheological properties of polystyrene (PS–camphene) solutions with industrial applications. Unfortunately, the assessment of the very low shear viscosities of camphene‐based materials (below 0.005 Pa s) is still a challenge with commercial rheometers. Flow curves, stress growth tests, and small amplitude oscillatory shear (SAOS) measurements were carried out as a function of PS concentration (0, 2.5, 5.0, 10, and 20 wt % PS) to understand the rheological behavior of these systems. Results indicate that liquid camphene has a shear‐thinning behavior (flow index = 0.99) when the increase of polymer concentration involves changes in the structure of these systems (flow index = 0.10 for 20 wt % PS). An increase in PS concentration leads to a forwarding in the shear‐thinning zone, and the Newtonian region (from ∼1 s −1 , for 0 wt % PS, to 10 −3 s −1 for 20 wt % PS). Eventually, these results evidence the high dependence of η ∞ on PS concentration (from ∼1.16 ± 0.01 Pa s, for 0 wt % PS, to 631.5 ± 0.2 Pa s for 20 wt % PS). © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47953.