Properties and morphology of poly(ethylene terephthalate) and high‐density polyethylene blends

Abstract

Blends of poly(ethylene terephthalate) (PET) and high-density polyethylene (HDPE) with and without a compatibilizing agent were studied. Both materials are widely used in the soft drink bottle industry. The compatibilizing agent was a copolymer of ethylene and methacrylic acid partially neutralized with zinc (Surlyn). The olefinic segment of Surlyn is compatible with HDPE, whereas the Surlyn carboxylic acid groups is affine with the PET carbonyl groups. The effectiveness of the compatibilizing agent was evaluated using different techniques, such as infrared spectroscopy, differential scanning calorimetry, scanning electron microscopy, and mechanical properties.

Influence of Blend Composition and Compatibilizer on Mechanical and Morphological Properties of Recycled HDPE/PET Blends

“…The poor intrinsic mechanical properties of E-GMA could be another possible reason for the reduced tensile and flexural properties [11]. The compatibilizing role of E-GMA for rHDPE/rPET blends can be confirmed by the toughening behaviour, which implies for SB of blends [18]. Figure 6 and Figure 7 illustrate FTIR spectra of raw materials, uncompatibilized and compatibilizedr HDPE/ rPET (75/25 wt/wt) blends with 5 php E-GMA.…”

Preparation of thermoplastic elastomers based on silicone rubber and polyethylene by thermomechanical reactive blending: Effects of polyethylene structural parameters

“…However, most blends remain immiscible after blending attempts and therefore exhibit poor mechanical properties on a macroscopic scale. [1][2][3][4][5] Different methods can be employed for the compatibilization of the blend polymeric phases. Functionalization of the blend components before blending, addition of a copolymer during mixing process, [5][6][7][8] and also compatibilization through in situ reactive melt mixing 9 -14 promotes in most cases the compatibilization of the phases in the mix.…”

“…[1][2][3][4][5] Different methods can be employed for the compatibilization of the blend polymeric phases. Functionalization of the blend components before blending, addition of a copolymer during mixing process, [5][6][7][8] and also compatibilization through in situ reactive melt mixing 9 -14 promotes in most cases the compatibilization of the phases in the mix. Blends of polyethylene and silicone rubber (PDMS) would be of particular interest because of low glass transition temperature (Ϸ Ϫ120°C), low surface energy, high permeability to gases, good thermal UV and flame resistance, and also good biocompatibility of silicone rubber.…”

Investigation into the morphology and mechanical properties of melt‐drawn filaments from uncompatibilized blends of polystyrene and high‐density polyethylene

“…Likewise, at high PS concentrations the viscosity is dominated by the continuous PS phase and the relationship falls above the linear curve. Previous researchers [27][28][29][30] have suggested that the incompatible interface between immiscible polymer melts will lead to interlayer slip and a reduction in the apparent viscosity of the blend. Such a phenomenon would increase extruder output upon addition of PS, counter to the observed behavior in Figure 8, and would also generate asymmetry of the output curve about the linear relationship, also not observed.…”

“…Abundant literature exists on the formation of dispersed (droplet/matrix) morphologies. [1][2][3][4][5] In recent years, much research has been focused on immiscible polymer blends with co-continuous morphologies. Co-continuity is defined as the morphological state that exists when both immiscible components are fully continuous throughout the blend system.…”