The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.
Origin of Multiple Melting Endotherms in a High Hard Block Content Polyurethane. 1. Thermodynamic Investigation
Abstract
The phase behavior of a set of high hard block content (50% to 100% hard segment by weight) linear thermoplastic polyurethanes has been investigated mainly via differential scanning calorimetry (DSC). The soft segment was based on a polypropylene oxide polyol end-capped with ethylene oxide and the hard segment on a 4,4‘-methylene diphenyldiisocyanate (MDI) chain extended by 2-methyl-1,3-propanediol (MP-Diol). By investigating thermal behavior of the samples, it has been possible to assign the observed high-temperature endothermic transitions to the disruption of an ordered structure appearing in the hard phase under certain annealing conditions and to the microphase mixing of the soft and hard segments. These results suggest a two-step melting process: (1) melting of the ordered structure present in the hard phase; (2) microphase mixing of the soft and hard segments. Wide-angle X-ray scattering experiments gave further support to this assignment. In addition, investigation of the melt-quenched samples has shown that for a hard segment concentration lower than 65% a homogeneous mixed phase is obtained while for a hard segment concentration higher than 65% a two-phase system is obtained, one pure hard segment phase coexisting with a mixed phase with a hard/soft segment weight ratio of ∼1.8 corresponding to 65% hard segment concentration.
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Yang, W. P., Macosko, C. W., & Wellinghoff, S. T. (1986) · Polymer · doi:10.1016/0032-3861(86)90012-1 · Cited by 190
Cited by
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Chattopadhyay, D. K., & Webster, D. C. (2009) · Progress in Polymer Science · doi:10.1016/j.progpolymsci.2009.06.002 · Cited by 1,748
Korley, L. T. J., Pate, B. D., Thomas, E. L., & Hammond, P. T. (2006) · Polymer · doi:10.1016/j.polymer.2006.02.093 · Cited by 366
The structure, microphase-separated morphology, and property of polyurethanes and polyureas
He, Y., Xie, D., & Zhang, X. (2014) · Journal of Materials Science · doi:10.1007/s10853-014-8458-y · Cited by 289
Chae Jung, Y., Hwa So, H., & Whan Cho, J. (2006) · Journal of Macromolecular Science, Part B · doi:10.1080/00222340600767513 · Cited by 131
Effect of microphase-separation promoters on the shape-memory behavior of polyurethane
Chen, S., Cao, Q., Jing, B., Cai, Y., Liu, P., & Hu, J. (2006) · Journal of Applied Polymer Science · doi:10.1002/app.24754 · Cited by 39
Metadata
- Authors
- Saiani, A., Daunch, W. A., Verbeke, H., Leenslag, J.-W., & Higgins, J. S.
- Venue
- Macromolecules
- Publisher
- American Chemical Society (ACS)
- Published
- 2001-11-16
- Volume
- 34
- Issue
- 26
- Pages
- 9059-9068
- ISSN
- 0024-9297 (ISSN-L)
- 1520-5835
- OpenAlex
- W1991029362
- Cited by
- 202
- References
- 1
- FWCI
- 4.78
- Type
- journal article
- Language
- en
- Open access
- closed
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
