Pattern formation in a bi-soft segment urethane elastomer

Ana C. Trindade; M. H. Godinho; Marcelo Luiz Simões; J. L. Figueirinhas

doi:10.1080/15421400490431877

Pattern formation in a bi-soft segment urethane elastomer

Ana C. Trindade, M. H. Godinho, Marcelo Luiz Simões, J. L. Figueirinhas

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

Abstract

In the present work we study pattern formation in a bi-soft segment urethane/urea elastomer. The material under study is a film prepared from a polypropylene oxide based isocyanate terminated trial prepolymer (PU) and polybutadiene dial (PBDO) with 60% by weight of PBDO. Small angle light scattering (SALS) patterns were recorded as a function of elongation for different rates of extension. It was found that the process of band and stripe formation is dependent upon the sample elongation and rate of extension with a strong increase of band and stripe amplitude with increasing elongation. The SALS data also reveals that the bands' periodicity is independant of the rate of extension within the range studied.

Original language	English
Pages (from-to)	93/[1703]-101/[1711]
Journal	Molecular Crystals and Liquid Crystals
Volume	412
DOIs	https://doi.org/10.1080/15421400490431877
Publication status	Published - 2004
Event	19th International Liquid Crystal Conference, ILCC2002 - Edinburgh, United Kingdom Duration: 30 Jun 2002 → 5 Jul 2002

Keywords

Liquid crystalline elastomers
Pattern formation
Urethane/urea elastomers

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10.1080/15421400490431877

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title = "Pattern formation in a bi-soft segment urethane elastomer",

abstract = "In the present work we study pattern formation in a bi-soft segment urethane/urea elastomer. The material under study is a film prepared from a polypropylene oxide based isocyanate terminated trial prepolymer (PU) and polybutadiene dial (PBDO) with 60% by weight of PBDO. Small angle light scattering (SALS) patterns were recorded as a function of elongation for different rates of extension. It was found that the process of band and stripe formation is dependent upon the sample elongation and rate of extension with a strong increase of band and stripe amplitude with increasing elongation. The SALS data also reveals that the bands' periodicity is independant of the rate of extension within the range studied.",

keywords = "Liquid crystalline elastomers, Pattern formation, Urethane/urea elastomers",

author = "Trindade, {Ana C.} and Godinho, {M. H.} and Sim{\~o}es, {Marcelo Luiz} and Figueirinhas, {J. L.}",

note = "This work was supported in part by Project POCTI/32597/CTM/2000-FEDER.; 19th International Liquid Crystal Conference, ILCC2002 ; Conference date: 30-06-2002 Through 05-07-2002",

year = "2004",

doi = "10.1080/15421400490431877",

language = "English",

volume = "412",

pages = "93/[1703]--101/[1711]",

journal = "Molecular Crystals and Liquid Crystals",

issn = "1542-1406",

publisher = "Taylor & Francis",

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TY - JOUR

T1 - Pattern formation in a bi-soft segment urethane elastomer

AU - Trindade, Ana C.

AU - Godinho, M. H.

AU - Simões, Marcelo Luiz

AU - Figueirinhas, J. L.

N1 - This work was supported in part by Project POCTI/32597/CTM/2000-FEDER.

PY - 2004

Y1 - 2004

N2 - In the present work we study pattern formation in a bi-soft segment urethane/urea elastomer. The material under study is a film prepared from a polypropylene oxide based isocyanate terminated trial prepolymer (PU) and polybutadiene dial (PBDO) with 60% by weight of PBDO. Small angle light scattering (SALS) patterns were recorded as a function of elongation for different rates of extension. It was found that the process of band and stripe formation is dependent upon the sample elongation and rate of extension with a strong increase of band and stripe amplitude with increasing elongation. The SALS data also reveals that the bands' periodicity is independant of the rate of extension within the range studied.

AB - In the present work we study pattern formation in a bi-soft segment urethane/urea elastomer. The material under study is a film prepared from a polypropylene oxide based isocyanate terminated trial prepolymer (PU) and polybutadiene dial (PBDO) with 60% by weight of PBDO. Small angle light scattering (SALS) patterns were recorded as a function of elongation for different rates of extension. It was found that the process of band and stripe formation is dependent upon the sample elongation and rate of extension with a strong increase of band and stripe amplitude with increasing elongation. The SALS data also reveals that the bands' periodicity is independant of the rate of extension within the range studied.

KW - Liquid crystalline elastomers

KW - Pattern formation

KW - Urethane/urea elastomers

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U2 - 10.1080/15421400490431877

DO - 10.1080/15421400490431877

M3 - Conference article

AN - SCOPUS:12844258190

VL - 412

SP - 93/[1703]-101/[1711]

JO - Molecular Crystals and Liquid Crystals

JF - Molecular Crystals and Liquid Crystals

SN - 1542-1406

T2 - 19th International Liquid Crystal Conference, ILCC2002

Y2 - 30 June 2002 through 5 July 2002

ER -

Pattern formation in a bi-soft segment urethane elastomer

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Keywords

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