ISSN:
1435-1536
Schlagwort(e):
Viscoelasticity
;
spinnability
;
tetradecyltrimethylammoniumsalicylate
;
hexadecyltrimethylammoniumsalicylate
;
rodlikemicelle
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Chemie und Pharmazie
,
Maschinenbau
Notizen:
Abstract The viscoelasticity has been measured for aqueous solutions of tetradecyl-and hexadecyltrimethylammonium salicylates (C14TASal, C16TASal). The aqueous solutions of C14TASal without salt displayed the gel-like behavior at 10.0×10−2 g cm−3, but those more dilute than 3.2×10−2 g cm−3 presented the viscoelasticity similar to that of a Maxwell liquid. The Maxwell-like behavior was converted to the polymer-like one on the addition of (0.1–0.2) M NaBr or (0.02–0.2) M NaSal. The gel-like viscoelasticity can be connected with the spinnability of “cohesive fracture failure”, and the Maxwell-like and polymer-like viscoelasticities are concerned with the spinnability of “ductile failure”. The gel-like and Maxwell-like viscoelasticities originate in the pseudo-network formed by the pseudo-linkages between rodlike micelles, while the polymer-like viscoelasticity is caused by the entanglement of long rodlike micelles in semidilute and concentrated solutions. The aqueous solutions of C16TASal behaved very similar to those of C14TASal.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00655477
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