Morphological, interfacial and rheological properties in multilayer polymers: A review

Gholami, Farzad; Pakzad, Leila; Behzadfar, Ehsan

doi:10.1016/j.polymer.2020.122950

Cited by 37 publications

(30 citation statements)

References 139 publications

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“…The rheological properties are the important parameters on the properties of multilayer packaging (MLP). Some of the common rheological defects have been listed including viscoelastic instabilities, layer breakup, variability of relaxation times in polymers, and so on (Gholami et al., 2020); therefore, maintenance of rheological properties during processing plays an important role in MLP. Commercial multilayer films are handled as a single ply in the packaging industries for flexible and semi‐rigid packages in the food and pharmaceutical industries.…”

Section: Introductionmentioning

confidence: 99%

High‐pressure treatment of water‐filled co‐extruded polylactide films: Effect on microstructure, barrier, thermal, and rheological properties

Ahmed

Mulla

Vohra

2022

Journal of Food Science

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The impact of high‐pressure treatments (450 and 600 MPa) on the morphological, thermal, structural, and barrier properties of commercial coextruded polylactide (PLA) packaging films has been explored to evaluate their applicability in food processing. Pouches filled with water as a food simulant were subjected to high‐pressure treatment for 15 min at ambient temperature. Results indicated no significant changes in the visual appearance, color, integrity, or water barrier properties of the post‐process pouches. However, high‐pressure treatment affected mechanical property results. Thermal analysis of the film showed endothermic double melting peaks (165.12 and 170.55°C), which did not change with the pressurization; however, the exothermic crystallization peak (118.08°C) varied significantly. Both SEM and AFM micrographs demonstrated that the surface morphology and roughness parameters (arithmetic mean [Sa] and root mean square height [Sq]) of the films were significantly affected by the HP treatment, which is further complemented by the FTIR spectra and XRD diffractogram. Melt rheology (175–205°C) of the pressure‐treated films showed a significant drop (20–30%) in mechanical rigidity (G′) when compared to the untreated sample. Changes in the microstructure/crystallinity in the PLA films were indicated by van Gurp and Palmen plot. Practical Application The results reported here can help to improve the design of the coextruded packaging materials so that it can be successfully implemented to high‐pressure processing and high pressure‐assisted thermal processing of food.

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Section: Introductionmentioning

confidence: 99%

High‐pressure treatment of water‐filled co‐extruded polylactide films: Effect on microstructure, barrier, thermal, and rheological properties

Ahmed

Mulla

Vohra

2022

Journal of Food Science

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“…Several advantages resulting from the properties of polymeric materials, such as high chemical and thermal resistance, high mechanical strength, barrier properties [ 1 , 2 , 3 , 4 , 5 ] with the simultaneous ease of processing and forming and a lightness of the products has led to the increasing use of plastics and rubber. As the environmental problems associated with the use of non-renewable polymers sources have not been eliminated, many scientists have focused on alternative solutions that can provide materials with similar properties, but of natural origin [ 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Common Nettle (Urtica dioica L.) as an Active Filler of Natural Rubber Biocomposites

2021

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Common nettle (Urtíca Dióica L.), as a natural fibrous filler, may be part of the global trend of producing biocomposites with the addition of substances of plant origin. The aim of the work was to investigate and explain the effectiveness of common nettle as a source of active functional compounds for the modification of elastomer composites based on natural rubber. The conducted studies constitute a scientific novelty in the field of polymer technology, as there is no research on the physico-chemical characteristics of nettle bio-components and vulcanizates filled with them. Separation and mechanical modification of seeds, leaves, branches and roots of dried nettle were carried out. Characterization of the ground plant particles was performed using goniometric measurements (contact angle), Fourier transmission infrared spectroscopy (FTIR), themogravimetric analysis (TGA) and scanning electron microscopy (SEM). The obtained natural rubber composites with different bio-filler content were also tested in terms of rheological, static and dynamic mechanical properties, cross-linking density, color change and resistance to simulated aging processes. Composites with the addition of a filler obtained from nettle roots and stems showed the highest mechanical strength. For the sample containing leaves and branches, an increase in resistance to simulated ultraviolet and thermo-oxidative aging processes was observed. This phenomenon can be attributed to the activity of ingredients with high antioxidant potential contained in the plant.

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“…In this way, different methods have been used to increase the adhesion and compatibility of polymeric blends and polymeric composites. [11][12][13][14][15][16][17][18] Generally, they involve adding a graft or block copolymer, surface modification (functionalization) of the filler to reduce the interfacial tension between the filler particles and the polymer matrix, improving the thermodynamic stability of the polymer system. 19 Many chemicals have been used to incorporate new functional groups at the polymer-polymer or polymerfiller interface, and they usually increase the adhesion through the formation of primary chemical bonds in this critical region of multiphase systems.…”

Section: Introductionmentioning

confidence: 99%

Composites ofABSwithSEBS‐g‐MAand copper microparticles modified by mussel‐bioinspired polydopamine: A comparative rheological study

Sakahara

Silva

Wang

2021

J of Applied Polymer Sci

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Characterizing and understanding composite polymeric systems' rheological behavior is essential to tune their melt flow in polymer processing machinery. Also, rheological tests are suitable tools to evaluate the microstructure and interface adhesion of polymeric composites, which are relevant parameters on the composite performance in their applications. Poly(acrylonitrile‐co‐butadiene‐co‐styrene) (ABS) and its composites are essential materials used to manufacture consumer goods necessary to maintain the quality of life of human beings. In this work, we report on polymer systems based on ABS and poly(styrene‐block‐ethylene‐co‐butylene‐block‐styrene)‐graft‐maleic anhydride (SEBS‐g‐MA) as polymer matrix containing dispersed copper microparticles (ABS:SEBS‐g‐MA:Cu). Polydopamine, a bioinspired polymer, was applied as a filler‐matrix interface compatibilizer of the composites. The linear viscoelastic rheological measurements evidence a shear‐thinning behavior for the composites, and the polydopamine coating affects the polymer phase's relaxation time. The cohesive energy density (Ec) and SEM micrographs indicate good adhesion between copper and ABS:SEBS‐g‐MA due to polydopamine interfacial adherence.

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Morphological, interfacial and rheological properties in multilayer polymers: A review

Cited by 37 publications

References 139 publications

High‐pressure treatment of water‐filled co‐extruded polylactide films: Effect on microstructure, barrier, thermal, and rheological properties

High‐pressure treatment of water‐filled co‐extruded polylactide films: Effect on microstructure, barrier, thermal, and rheological properties

Common Nettle (Urtica dioica L.) as an Active Filler of Natural Rubber Biocomposites

Composites ofABSwithSEBS‐g‐MAand copper microparticles modified by mussel‐bioinspired polydopamine: A comparative rheological study

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