异氰酸酯功能化碳纳米管/热塑性聚氨酯弹性体复合材料的制备及流变性能

doi:10.11896/j.issn.1005-023X.2018.24.032

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Abstract The functionalized carbon nanotubes (CNT) were prepared by grafting toluene-2,4-diisocyanate (TDI) onto the surface of CNT. Then a series of TDI functionalized carbon nanotubes (CNT-TDI)/thermoplastic polyurethane elastomer (TPU) composites containing various weight percents of CNT-TDI were prepared by prepolymer method via in-situ polymerization. The structure of CNT-TDI was characterized by Fourier-transformed infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis (TG); and the influences of the dosage of CNT-TDI on the rheological properties of CNT-TDI/TPU composites were studied by a rotational rheometer. The results demonstrate that, TDI successfully grafts onto CNT via the reaction between the groups of -NCO and -COOH, and its content is about 17%. The dynamic rheological studies show that the storage modulus (G′), loss modulus (G″) and the complex viscosity (η*) of pristine TPU increase significantly with the incorporation of CNT-TDI loading. The crossover of G′ and G″ and the tanδ move to low frequency with CNT-TDI contents increasing, which indicates the existence of a network structure in CNT-TDI/TPU composites. Han plots shift upward and gradually close to the diagonal line, and the van Gurp-Palmen plots shift downward, which implies that the elastic response exhibits an increasing trend. Cole-Cole curves show that the phase separation of composites decrease due to the presence of CNT-TDI.

Key words： carbon nanotubes isocyanate surface modification thermoplastic elastomer rheological properties

Published: 23 January 2019

CLC number:

TQ323.6

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	Articles by authors
	BAI Jingjing
	SU Huibo
	LIU Zhiwei

Cite this article:

BAI Jingjing,SU Huibo,LIU Zhiwei. Preparation and Rheological Properties of Isocyanate Functionalized Carbon Nanotubes/Thermoplastic Polyurethane Elastomer Composites[J]. Materials Reports, 2018, 32(24): 4386-4391.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.24.032 OR http://www.mater-rep.com/EN/Y2018/V32/I24/4386

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