Effect of Covalent-Functionalized Graphene Oxide with Polymer and Reactive Compatibilization on Thermal Properties of Maleic Anhydride Grafted Polypropylene

Abstract

The covalent functionalization of graphene oxide(GO) with bis(3-aminopropyl)-terminated poly(ethylene glycol)(NH 2 -PEG-NH 2 ) and then the grafting with maleic anhydride grafted polypropylene (MAPP) oligomer matrix using reactive compatibilization were carefully analyzed and verified through detailed investigations. Improvements in the compatibility among the modified GO and matrix, thermal stability, flame property, and crystallization property were achieved through the addition of a small amount of GO grafted MAPP ( PP-g-GO ) . Results of the thermo gravimetric and microscale combustion calorimetry analysises revealed that an increase in T max by 51 °C, and the values of the total heat release and peak heat release rate were reduced to 44.4% and 38.9%, respectively, through the addition of 2.0 wt% PP-g-GO relative to pure MAPP. The approach used in this work is an efficient strategy to improve the thermal behavior of polypropylene oligomer with a view to extend their use in advanced technological applications.

Influence of functionalized polypropylene on polypropylene/graphene oxide nanocomposite properties

“…The large increase in this ratio also is associated with an excess of defects in the graphitic lattice and a decrease in the average size of the in‐plane sp2 domain. These defects could be associated with the interactions between GO and amine groups of compatibilizer and also with the partial thermal reduction during solution blending . It also can be seen that M‐PP/PPgDMAE‐15/GO‐1.0 sample shows a lower increase in this ratio compared with the solution samples this indicates a more pronounced reduction of GO during melt mixing at high PP processing temperatures.…”

Effect of polymer modifier chain length on thermal conductive property of polyamide 6/graphene nanocomposites

“…The covalent-functionalized GO with polyethylene glycol have been reported in our previous research [16]. In this work, three chain lengths of double amino-terminated polyethylene glycol (NH 2 -PEG-NH 2 ) were used to functionalize graphene and were investigated in detail.…”

Enhanced thermal conductive property of polyamide composites by low mass fraction of covalently grafted graphene nanoribbons

“…[8][9][10][11] Bozlar M. et al first observed the percolation of CNT in which the l had an enhancement of 130% (0.4 W m À1 K À1 ) at 0.15 wt% CNT loading (totally, B0.75 wt% of Al 2 O 3 -CNT hybrid filler) in epoxy matrix. [15][16][17][18][19][20] The l of polyamide (PA) composites was increased by 112% at 10 wt% graphene oxide loading via the in situ polymerization coupled with the thermal reduction method. An important reason probably rests in the predominance of interface thermal resistance (ITR) between the graphene layers and polymer matrix, and another one is that, in many cases, no efficient thermal conductive networks are constructed.…”