Polyurethanes containing a crystalline polyol and semiflexible urethane segments

Borja Fernández-D'Arlas; Raquel Fernández; James Runt; Arantxa Eceiza

doi:10.1002/app.41281

Polyurethanes containing a crystalline polyol and semiflexible urethane segments

Borja Fernández-D'Arlas, Raquel Fernández, James Runt, Arantxa Eceiza

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

3 Scopus citations

Abstract

Ultradrawing semicrystalline polymers is an intriguing approach to develop stiff, strong, and tough polymeric fibers. In the research field of polyurethane copolymer elastomers the term "soft segment" usually refers to the medium molecular weight glycol while the term "hard segment" stands for the urethane rich or isocyanate-short glycol segments. Here we investigate the influence of semiflexible segment content in the urethane rich phase on the mechanical properties and morphology of polyurethanes synthesized with a crystalline polyol as a "soft" segment. Materials with lower semiflexible urethane segment content developed stiffer and stronger materials upon drawing. This was related to greater soft segment crystallization along the draw direction. Materials with a higher fraction of semiflexible urethane segments were more elastic (higher yield strains and strengths) but exhibited more brittle-like fracture.

Original language	English (US)
Article number	41281
Journal	Journal of Applied Polymer Science
Volume	132
Issue number	3
DOIs	https://doi.org/10.1002/app.41281
State	Published - Jan 1 2015

All Science Journal Classification (ASJC) codes

Chemistry(all)
Surfaces, Coatings and Films
Polymers and Plastics
Materials Chemistry

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10.1002/app.41281

Cite this

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abstract = "Ultradrawing semicrystalline polymers is an intriguing approach to develop stiff, strong, and tough polymeric fibers. In the research field of polyurethane copolymer elastomers the term {"}soft segment{"} usually refers to the medium molecular weight glycol while the term {"}hard segment{"} stands for the urethane rich or isocyanate-short glycol segments. Here we investigate the influence of semiflexible segment content in the urethane rich phase on the mechanical properties and morphology of polyurethanes synthesized with a crystalline polyol as a {"}soft{"} segment. Materials with lower semiflexible urethane segment content developed stiffer and stronger materials upon drawing. This was related to greater soft segment crystallization along the draw direction. Materials with a higher fraction of semiflexible urethane segments were more elastic (higher yield strains and strengths) but exhibited more brittle-like fracture.",

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AU - Eceiza, Arantxa

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Polyurethanes containing a crystalline polyol and semiflexible urethane segments

Abstract

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