Preparation of extruded polyethylene/chitosan blends compatibilized with polyethylene-graft-maleic anhydride

Quiroz-Castillo, Jesus Manuel; Rodríguez-Félix, Dora Evelia; Grijalva-Monteverde, H.; Castillo-Castro, T. del; Plascencia‐Jatomea, Maribel; Herrera‐Franco, Pedro J.

doi:10.1016/j.carbpol.2013.10.052

Cited by 66 publications

(70 citation statements)

References 25 publications

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“…Therefore, the mechanical properties of the PVA/CH films may suggest that the PVA polymer has greater influence on the tensile stress and maximum specific deformation. The increases in CH content cause change in stress and strain, due to the thermodynamic immiscibility and inherent incompatibility between thermoplastic polymers and CH [23]; the CH also disrupts the intramolecular hydrogen bonding of the PVA molecules [23]. Moreover, as the CH addition is increased, this changed the intermolecular hydrogen bonds formed between the amine and hydroxyl groups of CH [24].…”

Section: Oxygen Permeability and Water Vapor Permeabilitymentioning

confidence: 99%

Fabrication and Testing of PVA/Chitosan Bilayer Films for Strawberry Packaging

et al. 2017

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Strawberry packaging based on four different chitosan-poly(vinylalcohol) blend films with chitosan contents of 0 wt %, 20 wt %, 25 wt %, and 30 wt % was tested. The samples were stored at 18 ± 2 • C and 60% ± 5% relative humidity for six days. Strawberry quality was evaluated during and after storage. Strawberries packaged using these films showed significant differences in weight loss and firmness, decay percentage, titratable acidity, total soluble solids, and ascorbic acid content when compared to non-packaged strawberries. The 25 wt % bilayer film showed the best performance in terms of delaying changes in strawberries. The findings suggest that these 25 wt % chitosan films can used to extend strawberry shelf lives while maintaining quality levels.

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Section: Oxygen Permeability and Water Vapor Permeabilitymentioning

confidence: 99%

Fabrication and Testing of PVA/Chitosan Bilayer Films for Strawberry Packaging

et al. 2017

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“…Tóth et al [25] reported positive effects of maleic-anhydride grafted polyolefins (PO-g-MA) on tensile and impact properties of PE/crumb rubber system. 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].…”

Section: Introductionmentioning

confidence: 90%

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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“…The presence of functional groups (HDPE-g-MA) on the backbone of the matrix caused good interaction between it and PANI, leading to good dispersion of PANI in the matrix of the HDPE/LLPE/HDPE-g-MA. Quiroz-Castillo et al 28 studied the influence of the addition of polyethylene-graft-maleic anhydride as compatibilizer for blends of LDPE and glycerol. The authors noted that the use of compatibilizer and plasticizer agents improved the processability and compatibility of the mixtures, as well their mechanical properties, as revealed by mechanical property measurements and SEM.…”

Section: Morphologymentioning

confidence: 99%

Effect of PANI on Thermal, Mechanical and Electromagnetic Properties of HDPE/LLDPE/PANI Composites

et al. 2017

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In this work, polyaniline (PANI) in emeraldine-base form, synthesized by chemical oxidation polymerization, was protonated with hydrochloric acid (HCl). Composites based on high-density polyethylene (HDPE) and linear-low density polyethylene (LLDPE) blends with PANI were prepared in molten condition using a torque rheometer. The effect of compatibilizer agent (maleic anhydridegrafted high density polyethylene, HDPE-g-MA) and different contents of PANI on the blends-based composites was also investigated. Thermal, mechanical, and electromagnetic (electric permittivity) measurements and morphological aspects of the composites were evaluated. The addition of PANI content in the composites decreases the degree of crystallinity of HDPE and LLDPE blends, which implies that PANI particles make it difficult for co-crystallization to occur in the HDPE and LLDPE, respectively. On the other hand, the addition of compatibilizer agent in the HDPE and LLDPE blends increased the degree of crystallinity. The complex parameters of permittivity in the frequency range of 8.2 to 12.4 GHz varied as a function of the PANI content in the blend. It was also observed that the compatibilizer agent increased the composite stiffness and decreased the electric permittivity values. This result shows that the increasing rigidity of the molecular structure of the polyethylene matrix hindered the dissipation of the electromagnetic energy in the sample.

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Preparation of extruded polyethylene/chitosan blends compatibilized with polyethylene-graft-maleic anhydride

Cited by 66 publications

References 25 publications

Fabrication and Testing of PVA/Chitosan Bilayer Films for Strawberry Packaging

Fabrication and Testing of PVA/Chitosan Bilayer Films for Strawberry Packaging

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

Effect of PANI on Thermal, Mechanical and Electromagnetic Properties of HDPE/LLDPE/PANI Composites

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