Hyperbranched polytriazine grafted reduced graphene oxide and its application

Abstract

In this article, cyanuric chloride (CC) and hexamethylenediamine (HMD) as raw material, the grafting of hyperbranched polytriazine onto reduced graphene oxide surface (HBP‐RGO) was achieved by the repeated nucleophilic substitution between chlorine groups of CC and amino groups of HMD, respectively. The Fourier transform infrared, X‐ray photoelectron spectroscopic, Raman, transmission electron microscopic, thermogravimetric, and atomic force microscopic analysis showed that HBP‐RGO had been successfully prepared and the HBP had a dendritic structure on the surface of RGO. And then, the HBP‐RGO was added into polystyrene (PS) and the HBP‐RGO/PS composite was prepared by solution mixing. The micro‐morphology, thermal stability, and electrical conductivity of RGO/PS and HBP‐RGO/PS composites were characterized and compared. The scanning electron microscopic analysis showed that the HBP‐RGO can uniformly disperse in PS. Meanwhile, the HBP‐RGO/PS composite showed good thermal stability and electrical conductivity, the percolation threshold of the composites is low as 0.32 vol %. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2015, 53, 2132–2140

Molecular insights into the damping mechanism of poly(vinyl acetate)/hindered phenol hybrids by a combination of experiment and molecular dynamics simulation

“…For example, rubber/hindered phenol or hindered amine such as tetrakis[methylene-3-(3-5-di-tetra-butyl-4-hydroxy phenyl) propionyloxy]methane (AO-60) [11], triethylene glycolbis-[3-(3-tertbutyl-4-hydroxy-5-methyl phenyl)propionyloxy] (AO-70) [11], 3,9-bis[1,1-dimethyl-2-{b-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy}-eth yl]-2,4,8,10-tetraoxaspiro [5,5]-undecane (AO-80) [12], 2,20-methylene bis(6-tert-butyl-4-methylphenol) (AO-2246) [13], and N,N-dicyclohexyl-2-benzothia zolylsulfenamide (DZ) [14] have been widely investigated as a type of high performance damping material [15]. Moreover, in order to explore the damping mechanism in the hybrids, Zhao et al first investigate the damping mechanism of the nitrile-butadiene rubber (NBR)/AO-80 hybrids in a quantitative manner with the help of molecular dynamics (MD) simulation and attribute the cause of maximum dynamic property to the largest number of H-bonds and the greatest binding energy as well as the minimum fractional free volume (FFV) by a combination with the experimental results [16].…”

New ways to improve the damping properties in high‐performance thermoplastic vulcanizates

“…This method is based on the design concept of organic hybrid damping materials . Liu et al . found that the addition of hindered phenolic antioxidants improves the damping properties of XNBR remarkably.…”

Hydroxyl-Terminated Triazine Derivatives Grafted Graphene Oxide for Epoxy Composites: Enhancement of Interfacial and Mechanical Properties

“…It has been reported in our recent publications that functionalization of GO to generate derivatives could improve their dispersion and compatibility properties in the resin matrix [15,16,17]. Covalent functionalization of the GO surface is the most valid way to modulate thee chemical/physical features of GO sheets and provide suitable compatibility and dispersion, as well as accelerate the interfacial load transfer from the matrix to the sheet and improve the performances of the GO/polymer composite [18]. For instance, Liu [19] prepared a covalently bonded epoxy monomers (DER332) and curing agents (diamino diphenyl methane (DDM)-grafted GO (DED-GO) hybrid material through a three-step grafting procedure and acquired a higher improvement in tensile strength (30.0% at 0.2 wt% GO-DED) and elongation at break (16.0%) of the epoxy nanocomposite compared with the neat epoxy resin, respectively.…”