Viscoelastic features of SEBS TPEs: Novel results in solid and molten states

A. Arevalillo; M. E. Muñoz; A. Santamaría; L. Fraga; J. A. Barrio

Viscoelastic features of SEBS TPEs: Novel results in solid and molten states

A. Arevalillo^*
, M. E. Muñoz
, A. Santamaría
, L. Fraga
, J. A. Barrio

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

The viscoelastic behavior of two compression molded poly(styrene)- poly(ethylene-co-butylene)-poly(styene) (SEBS) triblock copolymers were investigated. The investigated samples were synthesized by Repsol-YPF having a polydispersity index of 1.2 and weight average molecular weights of 75,000 g/mol and 200,000 g/mol. The correlation between small amplitude oscillatory flow and industrial processing is observed. The SEBS2 extrudates are found to be very smooth for all of the shear rates, while very severe surface roughening is found in SEBS1 at a shear rate of 10s^-1 and above. The results also show that for the low molecular weight sample, SEBS1, the blocking effect of the PS domain on PEB chains motion is displayed at frequencies below 1 Hz. At high shear rates, an oscillation between entangled and disentangled states of chains to the wall causes the sharkskin phenomena.

Original language	English
Pages (from-to)	27-29
Number of pages	3
Journal	Rubber World
Volume	240
Issue number	2
Publication status	Published - May 2009
Externally published	Yes

Cite this

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title = "Viscoelastic features of SEBS TPEs: Novel results in solid and molten states",

abstract = "The viscoelastic behavior of two compression molded poly(styrene)- poly(ethylene-co-butylene)-poly(styene) (SEBS) triblock copolymers were investigated. The investigated samples were synthesized by Repsol-YPF having a polydispersity index of 1.2 and weight average molecular weights of 75,000 g/mol and 200,000 g/mol. The correlation between small amplitude oscillatory flow and industrial processing is observed. The SEBS2 extrudates are found to be very smooth for all of the shear rates, while very severe surface roughening is found in SEBS1 at a shear rate of 10s-1 and above. The results also show that for the low molecular weight sample, SEBS1, the blocking effect of the PS domain on PEB chains motion is displayed at frequencies below 1 Hz. At high shear rates, an oscillation between entangled and disentangled states of chains to the wall causes the sharkskin phenomena.",

author = "A. Arevalillo and Mu{\~n}oz, \{M. E.\} and A. Santamar{\'i}a and L. Fraga and Barrio, \{J. A.\}",

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T1 - Viscoelastic features of SEBS TPEs

T2 - Novel results in solid and molten states

AU - Arevalillo, A.

AU - Muñoz, M. E.

AU - Santamaría, A.

AU - Fraga, L.

AU - Barrio, J. A.

PY - 2009/5

Y1 - 2009/5

N2 - The viscoelastic behavior of two compression molded poly(styrene)- poly(ethylene-co-butylene)-poly(styene) (SEBS) triblock copolymers were investigated. The investigated samples were synthesized by Repsol-YPF having a polydispersity index of 1.2 and weight average molecular weights of 75,000 g/mol and 200,000 g/mol. The correlation between small amplitude oscillatory flow and industrial processing is observed. The SEBS2 extrudates are found to be very smooth for all of the shear rates, while very severe surface roughening is found in SEBS1 at a shear rate of 10s-1 and above. The results also show that for the low molecular weight sample, SEBS1, the blocking effect of the PS domain on PEB chains motion is displayed at frequencies below 1 Hz. At high shear rates, an oscillation between entangled and disentangled states of chains to the wall causes the sharkskin phenomena.

AB - The viscoelastic behavior of two compression molded poly(styrene)- poly(ethylene-co-butylene)-poly(styene) (SEBS) triblock copolymers were investigated. The investigated samples were synthesized by Repsol-YPF having a polydispersity index of 1.2 and weight average molecular weights of 75,000 g/mol and 200,000 g/mol. The correlation between small amplitude oscillatory flow and industrial processing is observed. The SEBS2 extrudates are found to be very smooth for all of the shear rates, while very severe surface roughening is found in SEBS1 at a shear rate of 10s-1 and above. The results also show that for the low molecular weight sample, SEBS1, the blocking effect of the PS domain on PEB chains motion is displayed at frequencies below 1 Hz. At high shear rates, an oscillation between entangled and disentangled states of chains to the wall causes the sharkskin phenomena.

UR - https://www.scopus.com/pages/publications/66449104956

M3 - Article

AN - SCOPUS:66449104956

SN - 0035-9572

VL - 240

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JO - Rubber World

JF - Rubber World

IS - 2

ER -

Viscoelastic features of SEBS TPEs: Novel results in solid and molten states

Abstract

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