Abstract
Polymer nanocomposites consist of a polymer matrix and reinforcing particles that have at least one dimension under 100 nm. The processing of nanocomposite polymers is the most important stage, determining the final properties of nanocomposites. Nanocomposites are now preferentially prepared by melt-mixing using conventional compounding processes such as twin-screw extrusion. Many processing parameters (polymer matrix type, content and type of nanofiller, barrel temperature, screw speed, number and shape of extruder screws, etc.) affect the properties of nanocomposites. This research work represents an investigation of the influence of processing parameters (amount of nanoclay filler, the screw rotation speed, and extruder barrel temperature) on the flexural properties of polyamide 12/nanoclay-reinforced nanocomposite. From the test results, it is apparent that an increase in nanoclay content from 1 to 8% significantly increases flexural strength. The obtained nanocomposite has a 19% higher flexural strength and a 56% higher flexural modulus than pure PA12. Mathematical models that show the dependence of flexural strength and flexural modulus on the processing parameters used were obtained as a result of this analysis.
Highlights
IntroductionPolymer nanocomposites are composites consisting of a polymer matrix containing a dispersion of nanoscale particles
Mathematical models that show the dependence of flexural strength and flexural modulus on the processing parameters used were obtained as a result of this analysis
The obtained polymer structures were characterized by means of X-ray diffraction (XRD) and scanning electron microscopy (SEM)
Summary
Polymer nanocomposites are composites consisting of a polymer matrix containing a dispersion of nanoscale particles. The performance of nanocomposites depends on the properties on their constituents; on their composition; and on various characteristics of the nanoparticles, such as their size, aspect ratio, specific surface area, and physical/chemical compatibility with the matrix. Due to the large surface area of nanosize particles, only small amounts are needed to cause significant changes in the mechanical (Young’s modulus and strength), physical, thermal, and electrical properties of polymer nanocomposites. In this way, preferably better properties of nanocomposites (compared with conventional microcomposites) can be achieved [4,6]
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