methylenebis(p-phenyl isocyanate)-Based Polyurethane Ionomers. 2. Structure-Property Relationships

Day Chyuan Lee; Richard Register; Stuart Cooper; Chang zheng Yang

doi:10.1021/ma00182a027

methylenebis(p-phenyl isocyanate)-Based Polyurethane Ionomers. 2. Structure-Property Relationships

Day Chyuan Lee, Richard Register, Stuart Cooper, Chang zheng Yang

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

39 Scopus citations

Abstract

The effects of polyol molecular weight and ionization level on the properties of elastomeric polyurethane ionomers were studied. The rubbery plateau modulus was found to depend on the fraction of ionic groups in the material. For the unionized polyurethane, the glass transition temperature of the copolymer was adequately described by the Fox equation. As the ionization level increased, the matrix T_g dropped due to aggregation of the ionized MDI units. Wide-angle X-ray scattering revealed no stress-induced crystallization in an ionomer prepared from a short-chain poly(tetramethylene oxide) polyol. A new morphological model is applied to small-angle X-ray scattering data and the results are compared with the physical property trends.

Original language	English (US)
Pages (from-to)	1005-1008
Number of pages	4
Journal	Macromolecules
Volume	21
Issue number	4
DOIs	https://doi.org/10.1021/ma00182a027
State	Published - 1988
Externally published	Yes

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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10.1021/ma00182a027

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abstract = "The effects of polyol molecular weight and ionization level on the properties of elastomeric polyurethane ionomers were studied. The rubbery plateau modulus was found to depend on the fraction of ionic groups in the material. For the unionized polyurethane, the glass transition temperature of the copolymer was adequately described by the Fox equation. As the ionization level increased, the matrix Tg dropped due to aggregation of the ionized MDI units. Wide-angle X-ray scattering revealed no stress-induced crystallization in an ionomer prepared from a short-chain poly(tetramethylene oxide) polyol. A new morphological model is applied to small-angle X-ray scattering data and the results are compared with the physical property trends.",

author = "Lee, {Day Chyuan} and Richard Register and Stuart Cooper and Yang, {Chang zheng}",

year = "1988",

doi = "10.1021/ma00182a027",

language = "English (US)",

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pages = "1005--1008",

journal = "Macromolecules",

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T1 - methylenebis(p-phenyl isocyanate)-Based Polyurethane Ionomers. 2. Structure-Property Relationships

AU - Lee, Day Chyuan

AU - Register, Richard

AU - Cooper, Stuart

AU - Yang, Chang zheng

PY - 1988

Y1 - 1988

N2 - The effects of polyol molecular weight and ionization level on the properties of elastomeric polyurethane ionomers were studied. The rubbery plateau modulus was found to depend on the fraction of ionic groups in the material. For the unionized polyurethane, the glass transition temperature of the copolymer was adequately described by the Fox equation. As the ionization level increased, the matrix Tg dropped due to aggregation of the ionized MDI units. Wide-angle X-ray scattering revealed no stress-induced crystallization in an ionomer prepared from a short-chain poly(tetramethylene oxide) polyol. A new morphological model is applied to small-angle X-ray scattering data and the results are compared with the physical property trends.

AB - The effects of polyol molecular weight and ionization level on the properties of elastomeric polyurethane ionomers were studied. The rubbery plateau modulus was found to depend on the fraction of ionic groups in the material. For the unionized polyurethane, the glass transition temperature of the copolymer was adequately described by the Fox equation. As the ionization level increased, the matrix Tg dropped due to aggregation of the ionized MDI units. Wide-angle X-ray scattering revealed no stress-induced crystallization in an ionomer prepared from a short-chain poly(tetramethylene oxide) polyol. A new morphological model is applied to small-angle X-ray scattering data and the results are compared with the physical property trends.

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M3 - Article

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JO - Macromolecules

JF - Macromolecules

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ER -

methylenebis(p-phenyl isocyanate)-Based Polyurethane Ionomers. 2. Structure-Property Relationships

Abstract

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