The influence of epoxy resin on the morphological and rheological properties of PET/PA66 blend

Abstract

Interfacial reactions have dominant effects on the morphological and rheological properties of compatibilized polymer blends. This work aims to investigate the effect of epoxy resin, as a coupling agent, on the interface properties and subsequent influences on the morphological and rheological properties of polyethylene terephthalate/polyamide66 (PET/PA66) blend. PET/PA66 70/30 blends with different amount of bisphenol A epoxy resin (0, 1, 3, and 5 wt.%) were prepared. SEM micrographs show reduction in droplet size with increasing epoxy resin concentration, confirming the reactive compatibilizing effect of the epoxy resin. Reactions at the interface of the PET-EP-PA66 blend are confirmed by FTIR spectra. Shear viscosity results demonstrates that adding epoxy resin could suppress the interfacial slip at the blend interphase. Obtained results from storage modulus (G ) curves show the presence of one plateau for the blends at low frequency region; nevertheless, relaxation spectra indicate the presence of two more relaxation mechanisms than precursors which are related to the shape relaxation of droplets and the interface relaxation. The presence of the interface relaxation time in the blend without epoxy resin can prove the presence of reactions between two condensation polymers; however, adding the epoxy resin results in reducing both relaxation time and interfacial tension and increasing interfacial shear modulus. These observations indicate that the epoxy resin has been successful to boost the reactions at the interface between two polymers. Fitting the obtained experimental data using Palierne model indicates that the general Palierne model could describe rheological properties of the blends very well.

Post-consumer polyethylene terephthalate and polyamide 66 blends and corresponding short glass fiber reinforced composites

“…Composites of post-consumer PET with SGFs has been used to improve the mechanical and thermo-mechanical properties of post-consumer PET [4][5][6][7] . The blending of post-consumer PET with engineering thermoplastics, such as poly(butylene terephthalate) (PBT) 8 , polycarbonate (PC) 9 and polyamide 66 (PA66) [10][11][12] , is another strategy that has been used to improve the properties of post-consumer PET.…”

Synergistic Influences of Stearic Acid Coating and Recycled PET Microfibers on the Enhanced Properties of Composite Materials

“…The vibration peaks of the PET fibers before and after being treated with NaOH were only different a few wavenumbers (cm −1 ). As indicated in Figure 3, recycled PET fibers have two characteristic peaks, at 3547.63 cm −1 , corresponding to -OH stretching vibration, and at 3434.04 cm −1 , corresponding to the variation of -NH stretching in polyamide, which was blended at a small part with recycled PET to shape and improve some properties for recycled PET fibers [22,23]. Two other peaks at 2960 and 2900 cm −1 correspond to CH 3 stretching and CH 2 stretching vibrations, respectively.…”

A review on new mesostructured composite materials: Part I. synthesis of polymer-mesoporous silica nanocomposite

“…Wang et al prepared nanocomposites of PP/PS (80/20) blend with two different types of fillers, nano-SiO 2 and MCM-41. 60 The compatibility of PP/PS blends was dramatically improved with the addition of MCM-41 with morphological evidence of interfacial adhesion. However, the interface did not show clear change in the presence of nano-SiO 2 , 1%, and 3%, in the blend compared to compatibility effect of MCM-41.…”