Polymer International

Volume 63, Issue 7 p. 1184-1191

Research Article

Synthesis and characterization of poly(propylene glycol) polytrioxamide and poly(urea oxamide) segmented copolymers

Daniel J Buckwalter,

Daniel J Buckwalter

Department of Chemistry and Macromolecules and Interfaces Institute, Virginia Tech, Blacksburg, VA, 24061 USA

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Amanda G Hudson,

Amanda G Hudson

Department of Chemistry and Macromolecules and Interfaces Institute, Virginia Tech, Blacksburg, VA, 24061 USA

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Robert B Moore,

Robert B Moore

Department of Chemistry and Macromolecules and Interfaces Institute, Virginia Tech, Blacksburg, VA, 24061 USA

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Timothy E Long,

Corresponding Author

Timothy E Long

Department of Chemistry and Macromolecules and Interfaces Institute, Virginia Tech, Blacksburg, VA, 24061 USA

Correspondence to: Timothy E Long, Department of Chemistry and Macromolecules and Interfaces Institute, Virginia Tech, Blacksburg, VA 24061, USA. E-mail: [email protected]Search for more papers by this author

Daniel J Buckwalter,

Daniel J Buckwalter

Department of Chemistry and Macromolecules and Interfaces Institute, Virginia Tech, Blacksburg, VA, 24061 USA

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Amanda G Hudson,

Amanda G Hudson

Department of Chemistry and Macromolecules and Interfaces Institute, Virginia Tech, Blacksburg, VA, 24061 USA

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Robert B Moore,

Robert B Moore

Department of Chemistry and Macromolecules and Interfaces Institute, Virginia Tech, Blacksburg, VA, 24061 USA

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Timothy E Long,

Corresponding Author

Timothy E Long

Department of Chemistry and Macromolecules and Interfaces Institute, Virginia Tech, Blacksburg, VA, 24061 USA

First published: 23 November 2013

https://doi.org/10.1002/pi.4666

Citations: 13

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Abstract

This report describes the synthesis and characterization of unprecedented poly(propylene glycol) (PPG) polytrioxamide and poly(urea oxamide) (UOx) segmented copolymers containing monodisperse hard segments. Synthesis of the segmented copolymers relied on an efficient two-step end-capping sequence, which resulted in novel difunctional oxamic hydrazide-terminated polyether oligomers. Polymerization with oxalyl chloride or 4,4′-methylenebis(cyclohexyl isocyanate) provided the desired segmented copolymers displaying thermoplastic elastomeric behavior. Variable-temperature Fourier transform infrared and ¹H NMR spectroscopies confirmed the presence of hard segment structures and revealed ordered hydrogen bonding interactions with thermal dissociation profiles similar to those of polyurea and polyoxamide copolymer analogs. Dynamic mechanical analysis of PPG-UOx exhibited a longer, rubbery plateau with increased moduli compared to PPG polyurea, and tensile analysis revealed a dramatic increase in copolymer toughness due to enhanced hydrogen bonding. A new step-growth polymerization strategy is described that is capable of producing tunable hydrogen bonding segmented copolymer architectures. © 2013 Society of Chemical Industry

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Volume63, Issue7

July 2014

Pages 1184-1191

Synthesis and characterization of poly(propylene glycol) polytrioxamide and poly(urea oxamide) segmented copolymers

Abstract

Supporting Information

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Synthesis and characterization of poly(propylene glycol) polytrioxamide and poly(urea oxamide) segmented copolymers

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