Effect of glass fiber on the electrical resistivities of polyoxymethylene/maleic anhydride‐grafted polyethylene/multiwalled carbon nanotube composites

Abstract

The effect of glass fiber (GF) on the electrical resistivities of polyoxymethylene (POM)/maleic anhydride‐grafted polyethylene (MAPE)/multiwalled carbon nanotube (MWCNT) composites is investigated. The POM/MAPE/MWCNT composites at a MWCNT loading of 0.75% are nonconductive because most of MWCNTs are isolated in the MAPE islands, and their electrical resistivities decrease significantly after the addition of GF because of the formation of MAPE‐coated GF structure, which facilitates the formation of conductive paths and was confirmed by field emission scanning electron microscopy (FESEM). The formation of MAPE‐coated GF structure is attributed to the interaction between GF and MAPE during melt compounding, as contrasted by the uncoated GF using high‐density polyethylene (HDPE) instead of MAPE. Nonconductive POM/5–20% MAPE/0.75% MWCNT composites become conductive upon the addition of 20% GF. This preparation method for conductive materials can be generalized to POM/5–20% maleic anhydride‐grafted polypropylene (MAPP)/0.75% MWCNT composites. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41794.

Effects of glass fiber on the properties of polyoxymethylene/thermoplastic polyurethane/multiwalled carbon nanotube composites

“…Because most MWCNTs are localized in TPU, MWCNT‐containing species mainly exist in two forms: dispersed TPU particles and TPU layer on GF. This is similar to the case of POM/MAPE/MWCNT/GF composites reported previously , and thus similar mechanism for the conduction is proposed: the two types of MWCNT‐containing species form co‐supporting conductive networks in which TPU‐coated GFs act as long‐distance charge transporters and TPU particles serve as an interconnection between the coated GFs (Fig. ), similar to the cases of mixed carbon filler‐filled polymers such as carbon black/MWCNT‐filled PP and graphite/CF‐filled HDPE .…”

“…When GF content increases from 20% to 30%, the electrical resistivity is almost unchanged. This reveals that an addition of 20% GF is needed to get the electrical resistivity down to a reasonably low value and further increase in GF content is not necessary in view of electrical conductivity, similar to the case of POM/MAPE/MWCNT reported previously .…”

“…However, when the CNTs locate in the dispersed phase, the conductivity of the composites usually decreases because of destructed conductive network with conductive fillers isolated in the dispersed phases . Recently, we reported an increase in the electrical conductivities of multiwalled CNT (MWCNT)‐filled polyoxymethylene (POM)/maleic anhydride‐grafted polyethylene (MAPE) blends, where MWCNTs selectively locate in the dispersed MAPE phase by adopting the idea of adding glass fiber (GF) reported for carbon black‐filled polypropylene (PP)/polyamide 66 and PP/epoxy blends . The formation of MAPE‐coated GFs is the key of success, which serve as long‐distance charge transporters, facilitating the construction of conductive paths .…”

Highly efficient electrically conductive networks in carbon‐black‐filled ternary blends through the formation of thermodynamically induced self‐assembled hierarchical structures

“…Polyoxymethylene (POM) is a widely used engineering plastic with a high tensile strength, high rigidity, and good creep and chemical resistance . The disadvantages of POM often cited include its brittleness and thermal sensitivity .…”

Two‐dimensional Ti3C2Tx (MXene)‐multiwalled carbon nanotubes reinforced ethyl methyl acrylate/ethylene octene copolymer binary blend hybrid nanocomposites with enhanced thermal and dielectric properties

“…Although, when 20 wt% of GF was added, it was shown that the MAPE phase coated the GF particles, resulting in the establishment of co-supporting conductive networks. 30 Herein, we take both the advantages of polymer blends and hybrid nanofillers to impart the thermal and electrical behaviors of highly conductive hybrid nanocomposites. Therefore, two interesting co-polymers, EMA and EOC in a 50:50 blend ratio, were chosen as the model blend technique, which gives co-continuous type morphology with different proportions of Ti 3 C 2 T x and MWCNTs.…”