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Nanocomposites based on thermoplastic polyurethane, millable polyurethane, and organoclay: effect of organoclay content

Authors
Barick, Aruna KumarChang, Young-Wook
Issue Date
Aug-2014
Publisher
SAGE PUBLICATIONS LTD
Keywords
Organoclays; polyurethanes; thermoplastic vulcanizate; nanocomposites; mechanical properties; thermal properties
Citation
HIGH PERFORMANCE POLYMERS, v.26, no.5, pp.609 - 617
Indexed
SCIE
SCOPUS
Journal Title
HIGH PERFORMANCE POLYMERS
Volume
26
Number
5
Start Page
609
End Page
617
URI
https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/22349
DOI
10.1177/0954008314525972
ISSN
0954-0083
Abstract
Dynamically vulcanized thermoplastic polyurethane/millable polyurethane blend and its organoclay-based nanocomposites with co-agent assisted peroxide curative system were prepared by melt intercalation technique using batch mixer followed by compression molding to make sheets. Fourier transform infrared spectroscopy analysis revealed the presence of interfacial interactions due to hydrogen bonding of PUs with organoclays. X-ray diffraction and transmission electron microscopy analyses qualitatively established the uniform dispersion of organoclays within the PU matrix up to 5 phr Cloisite 30B (C30B) content and exhibited small aggregates at higher C30B loading. Mechanical testing reported significant improvement in tensile strength with addition of C30B up to 5 phr loading and then reduced a little but tensile modulus continuously increased with increase in C30B loading. Dynamic mechanical analysis (DMA) evaluated that the storage modulus (E') and glass transition temperature (T-g) of both hard and soft segments of PU matrix substantially enhanced by incorporation of C30B. Thermogravimetric analysis revealed that the thermal stability of the PU matrix noticeably increased with C30B loading. Melt rheological characterization reported that all samples showed a strong shear thinning behavior within the scanned frequency range.
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Chang, Young-Wook
ERICA 공학대학 (DEPARTMENT OF MATERIALS SCIENCE AND CHEMICAL ENGINEERING)
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