Melt rheology and properties of compatibilized recycled poly(ethylene terephthalate)/(styrene‐ethylene‐ethylene‐propylene‐styrene) block copolymer blends

Abstract

Blends of recycled poly(ethylene terephthalate) (R-PET) and (styrene-ethylene-ethylene-propylene-styrene) block copolymer (SEEPS) compatibilized with (maleic anhydride)-grafted-styrene-ethylene-butylene-styrene (SEBS-g-MAH) were prepared by melt blending. The compatibilizing effects of SEBS-g-MAH were investigated systematically by study of the morphology, linear viscoelastic behavior, and thermal and mechanical properties of the blends. The results show that there is good agreement between the results obtained by rheological measurement and morphological analysis. The rheological test shows that the melt elasticity and melt strength of the blends increase with the addition of SEBS-g-MAH.The Cole-Cole plots and van Gurp-Palmen plots confirm the compatibilizing effect of SEBS-g-MAH. However, the Palierne model fails to predict the linear viscoelastic properties of the blends. The morphology observation shows that all blends exhibit a droplet-matrix morphology. In addition, the SEEPS particle size in the (R-PET)/SEEPS blends is significantly decreased and dispersed uniformly by the addition of SEBS-g-MAH. Differential scanning calorimeter analysis shows that the crystallization behavior of R-PET is restricted by the incorporation of SEEPS, whereas the addition of SEBS-g-MAH improves the crystallization behavior of R-PET compared with that of uncompatibilized (R-PET)/SEEPS blends. The Charpy impact strength of the blends shows the highest value at SEBS-g-MAH content of 10%, which is about 210% higher than that of pure R-PET. J. VINYL ADDIT. TECHNOL., 00:000-000,

Miscibility and phase behavior of reactively compatibilized poly(lactic acid)/poly(butylene succinate) bio‐blends using various rheological analyses

“…In addition, it was found that adding 3 wt% MuEpPOSS to the blends, regardless of the mixing ratio, caused the curves to prolong and shift to higher complex viscosity values. This is due to the longer time relaxation of the blends of graft and/or block copolymers formed at the interface as a result of the reactions between MuEpPOSS and PLA and/or PBS 33 …”

Manufacture and rheological behavior of all recycled PET/PP microfibrillar blends

“…Thanks to Figure 8B, one can observe this evolution suggesting that the blend fibrillated at a temperature close to 80°C contains the larger amount of fibers. [ 18,26 ] In addition, a more classical interpretation of vGP plot rests on the evolution of the angle value. At 90°, the viscous state is dominant (what corresponds to a Newtonian liquid) whereas for a null phase angle, the material deforms elastically like a solid.…”

High Shear Processing of Expanded Vermiculite Filled Polymer Composites: Particle Size Effect on Flexible Composites

“…In addition to these, its high tensile strength, tensile strain and toughness make it unique for many applications including household appliances, adhesives, coatings, automotive parts. [1][2][3] It can be used as a compatibilizer 4,5 or a modifier 6,7 for binary or ternary blends with polypropylene (PP), 8 polyamide (PA), 9,10 polyethylene terephthalate (PET), 11 PP/polystyrene (PS), 6,7 PP/ground tire rubber. 4 In most of these studies, SEEPS amount and type were found significant in terms of blend properties.…”

“…As reported in the study, SEBS-g-MAH incorporation improved morphological, mechanical, rheological properties. 11 In another study, SEEPS was used as an interfacial modifier for PP/PS blends to fabricate membranes. PP/PS/SEEPS ratio, processing route, and conditions were found important for the membrane properties.…”