Flame Retardancy and Dispersion of Functionalized Carbon Nanotubes in Thiol-Ene Nanocomposites.

Jiangbo Wang

doi:10.3390/polym13193308

Abstract

A polysilicone flame retardant (PA) was synthesized and covalently grafted onto the surface of carbon nanotubes (CNTs) via amide linkages to obtain modified CNTs (CNTs-PA). The grafting reaction was characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectrometer (XPS), Transmission electron microscopy (TEM) and Thermogravimetric analysis (TGA), and the resultant CNTs-PA was soluble and stable in polar solvents Chloroform. Thiol-ene (TE)/CNTs-PA nanocomposites were prepared via Ultraviolet curing. The flame retardancy of thiol-ene nanocomposites was improved, especially for the heat release rate. Moreover, the results from Scanning electron microscopy (SEM) and Dynamic mechanical thermal analysis (DMTA) showed that the CNTs-PA improved the dispersion of CNTs in thiol-ene and enhanced the interfacial interaction between CNTs-PA and thiol-ene matrix.

Highlights

Thiol-ene (TE) polymerization systems have been widely used in recent years for their rapid polymerization, low volume shrinkage, overall uniformity and insensitivity to oxygen inhibition as compared to traditional photopolymerized networks [1,2,3,4]
Kashiwagi et al [11,12] reported the systematic study on the flammability of polymer/Carbon nanotubes (CNTs) composites, and significant reduction in heat release rate (HRR) was observed after CNTs were incorporated into poly and polypropylene at a very low loading
The differences in the weight loss between CNTs, polysilicone flame retardant (PA) and CNTs-PA at 700 ◦C exhibit that the content of covalently grafted PA is 29.4 wt%.This result is consistent with the carbon tube micrographs obtained from Transmission electron microscopy (TEM) measurement, indicating that the morphology of carbon tube has changed after grafting reaction

Summary

Introduction

Thiol-ene (TE) polymerization systems have been widely used in recent years for their rapid polymerization, low volume shrinkage, overall uniformity and insensitivity to oxygen inhibition as compared to traditional photopolymerized networks [1,2,3,4]. Flame Retardancy and Dispersion of Functionalized Carbon Nanotubes in Thiol-Ene Nanocomposites.

Results

Conclusion