Nano Archive

Vegetable Oil-Based Hyperbranched Thermosetting Polyurethane/Clay Nanocomposites

Deka, Harekrishna and Karak, Niranjan (2009) Vegetable Oil-Based Hyperbranched Thermosetting Polyurethane/Clay Nanocomposites. Nanoscale Research Letters, 4 (7). pp. 758-765.

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Official URL: http://www.springerlink.com/content/u1g53571423201...

Abstract

The highly branched polyurethanes and vegetable oil-based polymer nanocomposites have been showing fruitful advantages across a spectrum of potential field of applications. Mesua ferrea L. seed oil-based hyperbranched polyurethane (HBPU)/clay nanocomposites were prepared at different dose levels by in situ polymerization technique. The performances of epoxy-cured thermosetting nanocomposites are reported for the first time. The partially exfoliated structure of clay layers was confirmed by XRD and TEM. FTIR spectra indicate the presence of H bonding between nanoclay and the polymer matrix. The present investigation outlines the significant improvement of tensile strength, scratch hardness, thermostability, water vapor permeability, and adhesive strength without much influencing impact resistance, bending, and elongation at break of the nanocomposites compared to pristine HBPU thermoset. An increment of two times the tensile strength, 6 °C of melting point, and 111 °C of thermo-stability were achieved by the formation of nanocomposites. An excellent shape recovery of about 96–99% was observed for the nanocomposites. Thus, the formation of partially exfoliated clay/vegetable oil-based hyperbranched polyurethane nanocomposites significantly improved the performance.

Item Type:Article
Subjects:Material Science > Functional and hybrid materials
Material Science > Bio materials
ID Code:5534
Deposited By:IoN
Deposited On:30 Jun 2009 11:48
Last Modified:30 Jun 2009 11:48

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