Reactive compatibilization and properties of recycled poly(ethylene terephthalate)/polyethylene blends

Pracellà, Mariano; Pazzagli, Federico; Gałęski, Andrzej

doi:10.1007/s00289-002-0001-7

Cited by 40 publications

(45 citation statements)

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“…HDPE-g-MA improved the mechanical properties of HDPE/chitosan composites in the research of Quiroz-Castillo et al [26]. The improved effect of SEBS-g-MA on impact properties has been proven in PET/HDPE blend in several studies [27][28][29][30][31]. It was also mentioned by Jogi et al [32] and Hato et al [33] that copolymers grafted with maleic anhydride promoted the compatibility between plastics and organoclays in nanocomposites.…”

Section: Introductionmentioning

confidence: 84%

Investigation of compatibilization effects of SEBS-g-MA on polystyrene/polyethylene blend with a novel separation method in melted state

Dobrovszky

Ronkay

2016

Polym. Bull.

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Abstract:Preparing polymer blends is an effective way to tailor the good properties of plastics but the most commonly used polymers are incompatible with each other. Therefore, to reduce the interfacial tension and to achieve finer and stable morphology, a suitable copolymer or compatibilizer has to be added to blends in order to establish new interactions between the phases. However, it is difficult to determine the required amount of compatibilizers in polymer blends. As an outcome of the present research a novel separation method was developed, where the blends are investigated in melted state, utilising centrifugal force to determine the adequacy of compatibilizers. The effectiveness of styrene/ethylene/butylene/styrene block copolymer grafted with maleic anhydride (SEBS-g-MA) was verified by blending two immiscible plastics: polystyrene (PS) and high density polyethylene (HDPE). FTIR measurements were carried out to support the results of optical microscopy regarding the purity of separation. Comparing the results of morphology, rheology and mechanical properties with the novel separation method, it seems that investigation of compatibilization effect in a melted state would be suitable for predicting the adequacy of compatibilizer in blend. The minimum required amount of compatibilizer was also detectable, wherein the stress-strain curves begins to change significantly and the impact properties starting to improve in PS/HDPE blends.Keywords: compatibilization; polymer separation; polymer blend; centrifugal force; polymers in melted state.Acknowledgements: This research was realized in the framework of TÁMOP 4.2.4. A/1-11-1-2012-0001 "National Excellence Program -Elaborating and operating an inland student and researcher personal support system".

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Section: Introductionmentioning

confidence: 84%

Investigation of compatibilization effects of SEBS-g-MA on polystyrene/polyethylene blend with a novel separation method in melted state

Dobrovszky

Ronkay

2016

Polym. Bull.

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“…4 The phase distribution depended strongly on composition, and, in particular, the preferential dispersion of R-PET in the SEBS-g-DEM was obtained when at least 40% by weight of LDPE was replaced by SEBS-g-DEM. Pracella et al 5,6 compatibilized R-HDPE/R-PET (25/75) blends by melt-mixing in the presence of various functionalized polyolefins (e.g., HDPE-g-MA, EPR-g-MA, E-AA, E-GMA, and SEBS-g-MA). E-GMA was more effective than SEBS-g-MA in reducing the size of dispersed phase in R-PET and R-HDPE rich blends.…”

Section: Introductionmentioning

confidence: 99%

“…Also, a high loading of functional elastomer-based compatibilizer (e.g., 10-20 pph) was necessary to significantly improve toughness of the blends. [4][5][6][7][8][9][10]16,21 Post-consumer PET undergoes a reduction in intrinsic viscosity or molar mass when recycled in a normal extrusion system because of thermal and hydrolytic degradation. This can result in significantly lower mechanical properties, especially tensile properties.…”

Section: Introductionmentioning

confidence: 99%

“…functional group grafted polyolefins [e.g., polyethylene grafted with maleic anhydride (PE-g-MA), and polyethylene-g-isocyanate], 5,6,11,[16][17][18][19][20] vinyl acetatebased copolymers, 21 and reactive monomers (e.g., silane and isocyanate). 3,22 For example, Coltelli et al functionalized SEBS with diethyl maleate (DEM) or 2-hydroxyethyl methacrylate and added them to LDPE/R-PET (80/20) blends in the presence of Ti(OBu) 4 as transesterification catalyst.…”

Section: Introductionmentioning

confidence: 99%

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Phase structure and properties of poly(ethylene terephthalate)/high‐density polyethylene based on recycled materials

Lei¹,

Wu²,

Clemons³

et al. 2009

J of Applied Polymer Sci

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Blends based on recycled high density polyethylene (R-HDPE) and recycled poly(ethylene terephthalate) (R-PET) were made through reactive extrusion. The effects of maleated polyethylene (PE-g-MA), triblock copolymer of styrene and ethylene/butylene (SEBS), and 4,4 0 -methylenedi(phenyl isocyanate) (MDI) on blend properties were studied. The 2% PE-g-MA improved the compatibility of R-HDPE and R-PET in all blends toughened by SEBS. For the R-HDPE/R-PET (70/30 w/w) blend toughened by SEBS, the dispersed PET domain size was significantly reduced with use of 2% PE-g-MA, and the impact strength of the resultant blend doubled. For blends with R-PET matrix, all strengths were improved by adding MDI through extending the PET molecular chains. The crystalline behaviors of R-HDPE and R-PET in one-phase rich systems influenced each other. The addition of PE-g-MA and SEBS consistently reduced the crystalline level (v c ) of either the R-PET or the R-HDPE phase and lowered the crystallization peak temperature (T c ) of R-PET. Further addition of MDI did not influence R-HDPE crystallization behavior but lowered the v c of R-PET in R-PET rich blends. The thermal stability of R-HDPE/R-PET 70/30 and 50/50 (w/w) blends were improved by chain-extension when 0.5% MDI was added.

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“…The modified PEs (so called compatibilizers) are used to increase interfacial adhesion, decrease surface tension between the interacting chains. PE compatibilizers can be prepared by grafting small polar functional groups like acrylic acid (AA), glycidyl methacrylate (GMA), maleic anhydride (MA), industrial ionomers and itaconic acid (IA) as pendant units or short-chain branches [10][11][12] (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

A comparative study on the efficiencies of polyethylene compatibilizers by using theoretical methods

Yıldırım

Yurtsever

2012

J Polym Res

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Functionalization of polyethylene chains by grafting of polar groups onto backbones is the most versatile way for preparing polyethylene based compatibilizers (PECs). In this work, a series of theoretical studies were performed to analyze the structure, adhesion and mixing behaviors of PECs. The effect of grafting different polar groups such as acrylic acid (AA), glycidyl methacrylate (GMA), maleic anhydride (MAH) and itaconic acid (IA) on the structure and cohesive properties of polyethylene chains were studied by Molecular Dynamics simulations. The mixing behavior of grafted polyethylenes with some commodity polymers such as polyetylene teraphthalate (PET), polyamide 6 (Nylon6), polyvinyl acetate (PVA) and polylactide (PLA) as well as with starch (ST) and starch acetate (STac) were investigated quantitatively by determining accurate interaction parameters using the modified Flory-Huggins Theory. We showed that the polar groups are the most reactive sites and they bind the chemically incompatible polymers by enabling the stronger interactions at the interfacial region.

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Reactive compatibilization and properties of recycled poly(ethylene terephthalate)/polyethylene blends

Cited by 40 publications

References 0 publications

Investigation of compatibilization effects of SEBS-g-MA on polystyrene/polyethylene blend with a novel separation method in melted state

Investigation of compatibilization effects of SEBS-g-MA on polystyrene/polyethylene blend with a novel separation method in melted state

Phase structure and properties of poly(ethylene terephthalate)/high‐density polyethylene based on recycled materials

A comparative study on the efficiencies of polyethylene compatibilizers by using theoretical methods

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