Thermo-mechanical properties linked to rheological features in high molecular weight SEBS copolymers: Effect of styrene content and ethylene/butylene proportion

Alfonso Arevalillo; María Eugenia Muñoz; Itxaso Calafell; Anton Santamaría; Luisa Fraga; Juan Antonio Barrio

doi:10.1016/j.polymertesting.2012.06.007

Thermo-mechanical properties linked to rheological features in high molecular weight SEBS copolymers: Effect of styrene content and ethylene/butylene proportion

Alfonso Arevalillo
, María Eugenia Muñoz
, Itxaso Calafell
, Anton Santamaría^*
, Luisa Fraga
, Juan Antonio Barrio

^*Corresponding author for this work

Technology Center

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

18 Citations (Scopus)

Abstract

Novel results on the thermomechanical and rheological properties of poly (Styrene-b-Ethylene-co-Butylene-b-Styrene) (SEBS) copolymers of molecular weight close to Mw = 200,000 g/mol, with varying styrene content and ethylene/butylene proportion, are presented. DSC and DMTA tests reveal that only the sample which contains more ethylene than butylene in PEB midblock chains is able to crystallize. Small amplitude oscillatory flow measurements show evidence of PEB entanglements, although the chains are anchored to PS cylinder domains. Increasing butylene proportion in PEB leads to a decrease of the entanglement density. Entanglements and microphase segregation bring about a very elastic behaviour which produces "plug-flow", leading to smooth extrudates, in extrusion flow experiments.

Original language	English
Pages (from-to)	849-854
Number of pages	6
Journal	Polymer Testing
Volume	31
Issue number	7
DOIs	https://doi.org/10.1016/j.polymertesting.2012.06.007
Publication status	Published - Oct 2012
Externally published	Yes

Keywords

Block copolymers
Entanglement
Relaxation
Rheology
Thermal properties

Access to Document

10.1016/j.polymertesting.2012.06.007

Cite this

@article{106bbfd13949485db5992003a32d8ade,

title = "Thermo-mechanical properties linked to rheological features in high molecular weight SEBS copolymers: Effect of styrene content and ethylene/butylene proportion",

abstract = "Novel results on the thermomechanical and rheological properties of poly (Styrene-b-Ethylene-co-Butylene-b-Styrene) (SEBS) copolymers of molecular weight close to Mw = 200,000 g/mol, with varying styrene content and ethylene/butylene proportion, are presented. DSC and DMTA tests reveal that only the sample which contains more ethylene than butylene in PEB midblock chains is able to crystallize. Small amplitude oscillatory flow measurements show evidence of PEB entanglements, although the chains are anchored to PS cylinder domains. Increasing butylene proportion in PEB leads to a decrease of the entanglement density. Entanglements and microphase segregation bring about a very elastic behaviour which produces {"}plug-flow{"}, leading to smooth extrudates, in extrusion flow experiments.",

keywords = "Block copolymers, Entanglement, Relaxation, Rheology, Thermal properties",

author = "Alfonso Arevalillo and Mu{\~n}oz, \{Mar{\'i}a Eugenia\} and Itxaso Calafell and Anton Santamar{\'i}a and Luisa Fraga and Barrio, \{Juan Antonio\}",

year = "2012",

month = oct,

doi = "10.1016/j.polymertesting.2012.06.007",

language = "English",

volume = "31",

pages = "849--854",

journal = "Polymer Testing",

issn = "0142-9418",

publisher = "Elsevier Ltd.",

number = "7",

}

TY - JOUR

T1 - Thermo-mechanical properties linked to rheological features in high molecular weight SEBS copolymers

T2 - Effect of styrene content and ethylene/butylene proportion

AU - Arevalillo, Alfonso

AU - Muñoz, María Eugenia

AU - Calafell, Itxaso

AU - Santamaría, Anton

AU - Fraga, Luisa

AU - Barrio, Juan Antonio

PY - 2012/10

Y1 - 2012/10

N2 - Novel results on the thermomechanical and rheological properties of poly (Styrene-b-Ethylene-co-Butylene-b-Styrene) (SEBS) copolymers of molecular weight close to Mw = 200,000 g/mol, with varying styrene content and ethylene/butylene proportion, are presented. DSC and DMTA tests reveal that only the sample which contains more ethylene than butylene in PEB midblock chains is able to crystallize. Small amplitude oscillatory flow measurements show evidence of PEB entanglements, although the chains are anchored to PS cylinder domains. Increasing butylene proportion in PEB leads to a decrease of the entanglement density. Entanglements and microphase segregation bring about a very elastic behaviour which produces "plug-flow", leading to smooth extrudates, in extrusion flow experiments.

AB - Novel results on the thermomechanical and rheological properties of poly (Styrene-b-Ethylene-co-Butylene-b-Styrene) (SEBS) copolymers of molecular weight close to Mw = 200,000 g/mol, with varying styrene content and ethylene/butylene proportion, are presented. DSC and DMTA tests reveal that only the sample which contains more ethylene than butylene in PEB midblock chains is able to crystallize. Small amplitude oscillatory flow measurements show evidence of PEB entanglements, although the chains are anchored to PS cylinder domains. Increasing butylene proportion in PEB leads to a decrease of the entanglement density. Entanglements and microphase segregation bring about a very elastic behaviour which produces "plug-flow", leading to smooth extrudates, in extrusion flow experiments.

KW - Block copolymers

KW - Entanglement

KW - Relaxation

KW - Rheology

KW - Thermal properties

UR - https://www.scopus.com/pages/publications/84864087563

U2 - 10.1016/j.polymertesting.2012.06.007

DO - 10.1016/j.polymertesting.2012.06.007

M3 - Article

AN - SCOPUS:84864087563

SN - 0142-9418

VL - 31

SP - 849

EP - 854

JO - Polymer Testing

JF - Polymer Testing

IS - 7

ER -

Thermo-mechanical properties linked to rheological features in high molecular weight SEBS copolymers: Effect of styrene content and ethylene/butylene proportion

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this