Effects of silica nanoparticles on tribology performance of poly(Epoxy Resin‐Bismaleimide)‐based nanocomposites

Abstract

Introduction of small nanoparticles into polymer matrix increases the mechanical, tribological, and thermal properties of nanocomposites. In this study, poly(epoxy resin‐bismaleimide‐diaminodiphenylmethane) (EP‐BMI‐DDM) copolymers filled with silica nanoparticles (SNPs) were successfully fabricated through in situ suspension polymerization. To enhance the interfacial adhesion of silica particles to the polymer matrix, the nanoparticles were organo‐modified by silane coupling agent. Results of tensile strength test revealed that increased toughness of the composites was attributed to the microcavitations induced by organo‐modified SNPs (OSNPs). Proper loadings of OSNPs can play a critical role in antifriction performance, with optimal friction coefficient of 0.17 (2 wt% OSNPs content). Thermostabilities of the nanocomposites were characterized by differential thermal gravimetric analysis. At the maximum rate of weight loss of EP‐BMI‐DDM/3 wt% OSNP, the temperature measured 452°C, which is 52°C higher than that of pure EP‐BMI‐DDM copolymers (400°C). The produced nanocomposites feature good thermostability and self‐lubrication can be widely used as wearable material under severe working conditions with higher temperature. POLYM. ENG. SCI., 59:274–283, 2019. © 2018 Society of Plastics Engineers

Tribological and thermomechanical properties of epoxy-matrix nanocomposites containing montmorillonite nanoclay intercalated with polybutadiene-based quaternary ammonium salt

“…The coefficient of friction (0.3@ 30 phr) of 2E4MI cured sample is lower than that of DDM cured one (0.6). The possible factors for this change may be attributed to the actual network structure, dispersion of MMT in the epoxy matrix and different viscoelasticity [37, 38].

Figure 9 Effect of HTPB-QAS-MMT content on tribological behaviour of epoxy resin nanocomposites under two curing system (a) friction coefficient, (b) wear rate.

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“…The coefficient of friction (0.3@ 30 phr) of 2E4MI cured sample is lower than that of DDM cured one (0.6). The possible factors for this change may be attributed to the actual network structure, dispersion of MMT in the epoxy matrix and different viscoelasticity [37,38].…”

Bismaleimide resins modified by a novel vanillin‐derived allyl compounds: Synthesis, curing behavior, and thermal properties

“…As one of the well‐received key basic resins, bismaleimide resin (BMI) has been generally accepted as commercial raw material in a vast array of cutting‐edge fields, including adhesives, sealants, and aerospace, mainly for their heat resistance, good chemical resistance, low shrinkage, and other excellent properties. [ 1–6 ] However, the cured BMI resin show two major shortcomings related to their high brittleness and relatively narrow processing windows. [ 7–9 ] Aiming to address these fatal disadvantages, a vast array of research articles on the modification of BMI resin has been reported.…”

Effect of carbon fiber addition on the tribological properties of polyoxymethylene composites

“…The commonly used tribo-fillers include glass fibers (GFs), ceramic nanoparticles and whiskers, carbon fibers (CFs), molybdenum disulfide, silica, graphite, carbon nanotubes, and polytetrafluoroethylene (PTFE) among others. [10][11][12][13][14][15][16][17][18][19] Among the above-mentioned fillers, both CF and PTFE are widely used to improve the tribological properties of polymer matrices. Chang et al [20] reported that the tribological properties of engineering thermoplastics were greatly enhanced with the presence of submicron size particles (i.e., titanium dioxide and zinc sulfide) and conventional fillers such as graphite flakes and CF.…”