Tensile and elastic properties of triblock copolymer based on aramide end-segments and polyether mid-segments

A. Araichimani, R.J. Gaymans

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Scopus)

Abstract

The tensile and elastic behavior of triblock copolymers containing uniform aramide (TΦB) hard end-segments (HS) and poly(tetramethylene oxide) (PTMO, Mn = 2900 g/mol) soft segments (SSs) was studied. The molecular weight of the copolymer was varied by changing the length of the soft mid-segment; by extending the PTMO2900 with terephthalate units, the SS length was increased from 2900 g/mol to 21,000 g/mol and concurrently the aramide concentration decreased from 18 to 3 wt %. The mechanical properties were investigated by means of tensile testing, stress relaxation (SR) experiments, and cyclic tensile set (TS) tests. The E-modulus was found to increase with increasing aramide content. The low molecular weight copolymers were brittle whereas the high molecular weight copolymers displayed large fracture strain values. The transition from brittle to ductile seemed to occur at a triblock copolymer molecular weight of 6600 g/mol. A strain-induced crystallization was observed at strains above 250%, and both the fracture strain and stress were found to be highly dependant on the molecular weight of the copolymer. Cyclic tensile experiments showed that the materials had low TS values up to the strain hardening point. On the other hand, the SR data at 10% strain seemed to be little dependant on the molecular weight. The higher molecular weight copolymers did not display lower SR values than their low molecular weight counterparts.
Original languageUndefined
Pages (from-to)1780-1785
JournalJournal of applied polymer science
Volume111
Issue number4
DOIs
Publication statusPublished - 2009

Keywords

  • triblock
  • IR-72552
  • METIS-263134
  • elastomers
  • polyamides
  • Block copolymers

Cite this

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title = "Tensile and elastic properties of triblock copolymer based on aramide end-segments and polyether mid-segments",
abstract = "The tensile and elastic behavior of triblock copolymers containing uniform aramide (TΦB) hard end-segments (HS) and poly(tetramethylene oxide) (PTMO, Mn = 2900 g/mol) soft segments (SSs) was studied. The molecular weight of the copolymer was varied by changing the length of the soft mid-segment; by extending the PTMO2900 with terephthalate units, the SS length was increased from 2900 g/mol to 21,000 g/mol and concurrently the aramide concentration decreased from 18 to 3 wt {\%}. The mechanical properties were investigated by means of tensile testing, stress relaxation (SR) experiments, and cyclic tensile set (TS) tests. The E-modulus was found to increase with increasing aramide content. The low molecular weight copolymers were brittle whereas the high molecular weight copolymers displayed large fracture strain values. The transition from brittle to ductile seemed to occur at a triblock copolymer molecular weight of 6600 g/mol. A strain-induced crystallization was observed at strains above 250{\%}, and both the fracture strain and stress were found to be highly dependant on the molecular weight of the copolymer. Cyclic tensile experiments showed that the materials had low TS values up to the strain hardening point. On the other hand, the SR data at 10{\%} strain seemed to be little dependant on the molecular weight. The higher molecular weight copolymers did not display lower SR values than their low molecular weight counterparts.",
keywords = "triblock, IR-72552, METIS-263134, elastomers, polyamides, Block copolymers",
author = "A. Araichimani and R.J. Gaymans",
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volume = "111",
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journal = "Journal of applied polymer science",
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Tensile and elastic properties of triblock copolymer based on aramide end-segments and polyether mid-segments. / Araichimani, A.; Gaymans, R.J.

In: Journal of applied polymer science, Vol. 111, No. 4, 2009, p. 1780-1785.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Tensile and elastic properties of triblock copolymer based on aramide end-segments and polyether mid-segments

AU - Araichimani, A.

AU - Gaymans, R.J.

PY - 2009

Y1 - 2009

N2 - The tensile and elastic behavior of triblock copolymers containing uniform aramide (TΦB) hard end-segments (HS) and poly(tetramethylene oxide) (PTMO, Mn = 2900 g/mol) soft segments (SSs) was studied. The molecular weight of the copolymer was varied by changing the length of the soft mid-segment; by extending the PTMO2900 with terephthalate units, the SS length was increased from 2900 g/mol to 21,000 g/mol and concurrently the aramide concentration decreased from 18 to 3 wt %. The mechanical properties were investigated by means of tensile testing, stress relaxation (SR) experiments, and cyclic tensile set (TS) tests. The E-modulus was found to increase with increasing aramide content. The low molecular weight copolymers were brittle whereas the high molecular weight copolymers displayed large fracture strain values. The transition from brittle to ductile seemed to occur at a triblock copolymer molecular weight of 6600 g/mol. A strain-induced crystallization was observed at strains above 250%, and both the fracture strain and stress were found to be highly dependant on the molecular weight of the copolymer. Cyclic tensile experiments showed that the materials had low TS values up to the strain hardening point. On the other hand, the SR data at 10% strain seemed to be little dependant on the molecular weight. The higher molecular weight copolymers did not display lower SR values than their low molecular weight counterparts.

AB - The tensile and elastic behavior of triblock copolymers containing uniform aramide (TΦB) hard end-segments (HS) and poly(tetramethylene oxide) (PTMO, Mn = 2900 g/mol) soft segments (SSs) was studied. The molecular weight of the copolymer was varied by changing the length of the soft mid-segment; by extending the PTMO2900 with terephthalate units, the SS length was increased from 2900 g/mol to 21,000 g/mol and concurrently the aramide concentration decreased from 18 to 3 wt %. The mechanical properties were investigated by means of tensile testing, stress relaxation (SR) experiments, and cyclic tensile set (TS) tests. The E-modulus was found to increase with increasing aramide content. The low molecular weight copolymers were brittle whereas the high molecular weight copolymers displayed large fracture strain values. The transition from brittle to ductile seemed to occur at a triblock copolymer molecular weight of 6600 g/mol. A strain-induced crystallization was observed at strains above 250%, and both the fracture strain and stress were found to be highly dependant on the molecular weight of the copolymer. Cyclic tensile experiments showed that the materials had low TS values up to the strain hardening point. On the other hand, the SR data at 10% strain seemed to be little dependant on the molecular weight. The higher molecular weight copolymers did not display lower SR values than their low molecular weight counterparts.

KW - triblock

KW - IR-72552

KW - METIS-263134

KW - elastomers

KW - polyamides

KW - Block copolymers

U2 - 10.1002/app.29032

DO - 10.1002/app.29032

M3 - Article

VL - 111

SP - 1780

EP - 1785

JO - Journal of applied polymer science

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SN - 0021-8995

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