Linear viscoelasticity, probe tack, and extrusion flow results of SEBS copolymers.(styrene-b-ethylene-co-butylene-b-styrene)(Report): An article from: Polymer Engineering and Science
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Publisher
Society of Plastics Engineers, Inc.
ISBN / ASIN
B003XHL8DK
ISBN-13
978B003XHL8D1
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This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on July 1, 2010. The length of the article is 4678 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.
From the author: Microphase-separated poly(styrene-b-ethylene-co-butylene-b-styrene) copolymers of different molecular weights with polystyrene (PS) volume fraction [phi] = 0.30 are investigated. Linear dynamic viscoelastic data reveal the blocking effect of the ordered PS microdomains, which produces a predominantly elastic response at low frequencies, associated with a mechanical relaxation. These results are correlated with tack and extrusion flow measurements, which involve polymer/metal adhesion processes. Nonlinearity implied in some experiments alters the ordered morphology of low molecular weight samples producing a viscous dominant behavior. Dissipation is reflected in viscous-like adhesion and lack of viscoplastic response in extrusion flow experiments. For the highest molecular sample, only a rubbery or entangled state (G' > G" and G' > [10.sup.5] Pa) is observed in the linear viscoleastic regime. This is associated with the lack of adhesion seen in both, probe tack experiments and capillary flow measurements. This lack of adhesion gives rise to a plug-flow as the polymer slips in the capillary wall. POLYM. ENG. SCI., 50:1449-1456, 2010. [C]2010 Society of Plastics Engineers
Citation Details
Title: Linear viscoelasticity, probe tack, and extrusion flow results of SEBS copolymers.(styrene-b-ethylene-co-butylene-b-styrene)(Report)
Author: Alfonso Arevalillo
Publication:Polymer Engineering and Science (Magazine/Journal)
Date: July 1, 2010
Publisher: Society of Plastics Engineers, Inc.
Volume: 50 Issue: 7 Page: 1449(8)
Article Type: Report
Distributed by Gale, a part of Cengage Learning
From the author: Microphase-separated poly(styrene-b-ethylene-co-butylene-b-styrene) copolymers of different molecular weights with polystyrene (PS) volume fraction [phi] = 0.30 are investigated. Linear dynamic viscoelastic data reveal the blocking effect of the ordered PS microdomains, which produces a predominantly elastic response at low frequencies, associated with a mechanical relaxation. These results are correlated with tack and extrusion flow measurements, which involve polymer/metal adhesion processes. Nonlinearity implied in some experiments alters the ordered morphology of low molecular weight samples producing a viscous dominant behavior. Dissipation is reflected in viscous-like adhesion and lack of viscoplastic response in extrusion flow experiments. For the highest molecular sample, only a rubbery or entangled state (G' > G" and G' > [10.sup.5] Pa) is observed in the linear viscoleastic regime. This is associated with the lack of adhesion seen in both, probe tack experiments and capillary flow measurements. This lack of adhesion gives rise to a plug-flow as the polymer slips in the capillary wall. POLYM. ENG. SCI., 50:1449-1456, 2010. [C]2010 Society of Plastics Engineers
Citation Details
Title: Linear viscoelasticity, probe tack, and extrusion flow results of SEBS copolymers.(styrene-b-ethylene-co-butylene-b-styrene)(Report)
Author: Alfonso Arevalillo
Publication:Polymer Engineering and Science (Magazine/Journal)
Date: July 1, 2010
Publisher: Society of Plastics Engineers, Inc.
Volume: 50 Issue: 7 Page: 1449(8)
Article Type: Report
Distributed by Gale, a part of Cengage Learning
