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2000•Journal of Applied Polymer ScienceRequires access

Synthesis and properties of polyurethane ionomers based on carboxylated polycaprolactone

Hong Chen, Dongzhong Chen, Quli Fan, Xuehai Yu

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Abstract

Polycaprolactone containing carboxyl groups (CPCL, M̄n = 1200) was prepared from caprolactone (CL) and dimethylol propionic acid (DMPA). Based on the CPCL, 4,4′-diphenylmethane diisocyanate (MDI) and 1,4-butanediol (BD), a novel series of polyurethane ionomers could be synthesized with ions in the soft segment. The tensile modulus and ultimate elongation of the ionomer cast films increased, and the glass transition temperature of the CPCL-rich phase moved to a higher temperature after ionization. Moreover, this kind of ionomers showed small amounts of hard segment crystallinity by DSC. WAXD shows an ionic peak at 2θ = 8.6° for the ionomer with carboxylate in the hard segment, which is not present in the ionomer with carboxylate in the soft segment. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 76: 2049–2056, 2000

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What this paper is about

Polycaprolactone containing carboxyl groups (CPCL, M̄n = 1200) was prepared from caprolactone (CL) and dimethylol propionic acid (DMPA). Based on the CPCL, 4,4′-diphenylmethane diisocyanate (MDI) and 1,4-butanediol (BD), a novel series of polyurethane ionomers could be synthesized with ions in the soft segment. The tensile modulus and ultimate elongation of the ionomer cast films increased, and the glass transition temperature of the CPCL-rich phase moved to a higher temperature after ionization. Moreover, this kind of ionomers showed small amounts of hard segment crystallinity by DSC. WAXD shows an ionic peak at 2θ = 8.6° for the ionomer with carboxylate in the hard segment, which is not present in the ionomer with carboxylate in the soft segment. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 76: 2049–2056, 2000

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Available abstract

Polycaprolactone containing carboxyl groups (CPCL, M̄n = 1200) was prepared from caprolactone (CL) and dimethylol propionic acid (DMPA). Based on the CPCL, 4,4′-diphenylmethane diisocyanate (MDI) and 1,4-butanediol (BD), a novel series of polyurethane ionomers could be synthesized with ions in the soft segment. The tensile modulus and ultimate elongation of the ionomer cast films increased, and the glass transition temperature of the CPCL-rich phase moved to a higher temperature after ionization. Moreover, this kind of ionomers showed small amounts of hard segment crystallinity by DSC. WAXD shows an ionic peak at 2θ = 8.6° for the ionomer with carboxylate in the hard segment, which is not present in the ionomer with carboxylate in the soft segment. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 76: 2049–2056, 2000

Key concepts: Ionomer, Polycaprolactone, Polyurethane, Crystallinity, Materials science, Polymer chemistry, Butanediol, Glass transition

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