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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/14700
Title: Effect of the microstructure of a hyperbranched polymer and nanoclay loading on the morphology and properties of novel polyurethane nanocomposites
Authors: Maji, Pradip K.
Guchhait P.K.
Bhowmick A.K.
Published in: ACS Applied Materials and Interfaces
Abstract: Novel polyurethane nanocomposites based on toluene diisocyanate, poly(propylene glycol), various hyperbranched polymers (HBPs), and layered silicate were synthesized with the aim of determining the effect of the layered silicate loading and the functionality of HBP on the structure and properties of polyurethane nanocomposites. The microstructure of the nanocomposites was investigated by X-ray diffraction analysis and high-resolution transmission electron microscopy. It was found that exfoliated morphology and good dispersion were obtained up to 8 phr clay loading for all of the nanocomposites. ∼100% increment in tensile strength, ∼2-fold increase in the lap shear strength, ∼200% increment in the peel strength, and 120% increment in the storage modulus along with a dramatic improvement in thermal stability were observed with the addition of 8 phr clay, over the pristine polyurethane. The higher the level of functionality of the HBP, the higher is the property enhancement. These properties were correlated with the state of dispersion of the clay platelets in the polyurethane matrix, the structure of the matrix, and clay-polymer interaction. © 2008 American Chemical Society.
Citation: ACS Applied Materials and Interfaces (2009), 1(2): 289-300
URI: https://doi.org/10.1021/am800020k
http://repository.iitr.ac.in/handle/123456789/14700
Issue Date: 2009
Keywords: hyperbranched polymer
layered silicate
nanocomposites
polyurethane
ISSN: 19448244
Author Scopus IDs: 56249287900
35085048300
26643264700
Author Affiliations: Maji, P.K., Rubber Technology Centre, Indian Institute of Technology, Kharagpur 721302, India
Guchhait, P.K., Rubber Technology Centre, Indian Institute of Technology, Kharagpur 721302, India
Bhowmick, A.K., Rubber Technology Centre, Indian Institute of Technology, Kharagpur 721302, India
Corresponding Author: Bhowmick, A. K.; Rubber Technology Centre, Indian Institute of Technology, Kharagpur 721302, India; email: anilkb@rtc.iitkgp.ernet.in
Appears in Collections:Journal Publications [PE]

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