structure and dynamic properties of thermoplastic polyurethane elastomer/hindered phenol hybrids

The organic hybrids of thermoplastic polyurethane (TPU)/hindered phenol (AO-80) were prepared through melt blending, which was followed by hot and cold pressing procedure. The microstructure and dynamic mechanical properties of the hybrids were systematically investigated through SEM, DSC, XRD, FTIR...

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Bibliographic Details
Published in:Journal of applied polymer science 2010-05, Vol.116 (4), p.2143-2150
Main Authors: Xiao, Daling, Zhao, Xiuying, Feng, Yiping, Xiang, Ping, Zhang, Liqun, Wang, Weimin
Format: Article
Language:English
Subjects:
Applied sciences
Compounding ingredients
damping
Dissolution
Dynamic mechanical properties
Exact sciences and technology
Glass transition
hindered phenol
hybrids
Miscellaneous
Phenol
Polymer industry, paints, wood
Polyurethane resins
Reproduction
Segments
Technology of polymers
Thermoplastic resins
TPU
Urethane thermoplastic elastomers
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Summary:The organic hybrids of thermoplastic polyurethane (TPU)/hindered phenol (AO-80) were prepared through melt blending, which was followed by hot and cold pressing procedure. The microstructure and dynamic mechanical properties of the hybrids were systematically investigated through SEM, DSC, XRD, FTIR, DMA and a tensile tester. The experimental results indicated that AO-80 was completely dissolved in the matrix. The glass transition of the soft segments of TPU was found to shift to higher temperature with the amount of AO-80 increasing, whereas the glass transition of the hard segments exhibited nearly no evident change, indicating that AO-80 was selectively located in the soft region of TPU and the formation of the strong intermolecular interactions (hydrogen bonding) between AO-80 and the soft region of TPU. With the increase of AO-80 in the hybrids, the tanδ peak gradually shifted to higher temperatures and the maximal tanδ value increased from 0.4 to 1.6. Meanwhile, the glass transition temperature ranges broadened and the TA value increased greatly with the more content of AO-80. Because of the decrease of the hard segments amount in the hybrids, the tensile stress of these hybrids decreased, but still maintained at a high level. The hybrids were expected to have potential applications as high performance damping materials combined with good mechanical properties.
ISSN:0021-8995
1097-4628
1097-4628
DOI:10.1002/app.31828