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Your search keyword '"Di Maio, Luciano"' showing total 8 results
Start Over Author "Di Maio, Luciano" Topic rheology
8 results on '"Di Maio, Luciano"'

2. Evaluation of Performance of PET Packaging Films Based on Different Copolyester O2-Scavengers.

Author

Apicella, Annalisa, Scarfato, Paola, Di Maio, Luciano, Garofalo, Emilia, and Incarnato, Loredana

Subjects
ABSORPTION, FOOD packaging, PACKAGING film, CHEMICAL scavengers, RHEOLOGY, MOLECULAR structure
Abstract

The aim of this work is to compare the scavenging performance and oxygen absorption kinetics of active food packaging films, produced by adding the same percentage of two different formulations of polymeric oxygen scavengers, both copolyester based and designed for PET packaging. Rheological analyses were conducted to investigate possible differences among the macromolecular structure, while oxygen absorption measurements in continuous were performed to evaluate the influence of the different composition on the scavenging phenomenon. The results revealed differences in the molecular chains, and an enhanced formulation for one of the scavengers, with increased scavenging power and exhaustion times. [ABSTRACT FROM AUTHOR]

Published
2018
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6. Effect of Nanocomposite Composition on Shear and Elongational Rheological Behavior of PLA/MMT Hybrids.

Author

Garofalo, Emilia, Scarfato, Paola, Di Maio, Luciano, and Incarnato, Loredana

Subjects
POLYLACTIC acid, SHEAR (Mechanics), RHEOLOGY, TUNING (Machinery), SILICATES, POLYMERIC nanocomposites
Abstract

The present work focuses on the possibility of conveniently tuning materials in PLA based nanocomposites in order to improve their processability in manufacturing processes where extensional flow is mainly involved. Nanocomposites at a constant silicate loading were produced by melt compounding, using a commercial polylactide grade (PLA 4032D) and two different organo-silicates (Cloisite 30B and Nanofil SE3010). A morphological characterization in solid and molten state, realized by TEM investigations and shear rheological measurements, firstly pointed out the influence of composition on the nanostructure of the hybrid systems. All the samples were then submitted to uniaxial stretching and the rheological response of the different nanocomposites was correlated to the initial nanostructure and the different polymer-clay affinity. [ABSTRACT FROM AUTHOR]

Published
2014
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7. Effect of polymer/organoclay composition on morphology and rheological properties of polylactide nanocomposites.

Author

Di Maio, Luciano, Garofalo, Emilia, Scarfato, Paola, and Incarnato, Loredana

Subjects
*NANOCOMPOSITE materials, *POLYLACTIC acid, *ORGANOCLAY, *SURFACE morphology, *RHEOLOGY, *VISCOSITY
Abstract

In this work the relationships between system composition, polymer-organoclay interaction, morphology and rheological response, under shear, and elongational flow, of different melt compounded polylactic acid (PLA)/organoclay nanocomposites are investigated, with the aim to properly select the better organoclay for a well-specified PLA grade and processing technology. Polylactide nanocomposites are prepared using two commercial polylactide grades (PLA 4032D and PLA 2003D) and two different organomodified montmorillonites (Cloisite 30B and Nanofil SE3010). FTIR analysis evidences the occurrence of stronger polymer/organoclay interactions for the system PLA4032D+C30B, resulting in a higher clay dispersion and exfoliation levels. Moreover, rheological tests at low shear rates show that, if PLA 2003D is used as polymer matrix (differing from PLA4032D by the presence of a high molecular weight tail), a better dispersed nanomorphology can be obtained with Nanofil SE3010, characterized by a double d-spacing compared to Cloisite 30B, despite the higher polar character of this latter nanofiller. On the other hand, elongational rheological measurements evidence for NSE3010-based hybrids a marked extensional thickening, whilst the stronger polar interactions between the phases in both the polylactide grades filled with C30B, determine increments in elongational viscosity, but inhibit the strain hardening behavior. POLYM. COMPOS., 36:1135-1144, 2015. © 2015 Society of Plastics Engineers [ABSTRACT FROM AUTHOR]

Published
2015
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8. Polylactide Nanocomposites As a New Solution for Eco-compatible Packaging Materials.

Author

Incarnato, Loredana, Di Maio, Luciano, Garofalo, Emilia, and Scarfato, Paola

Subjects
*NANOCOMPOSITE materials, *PACKAGING equipment, *SILICATES, *NANOPARTICLES, *TRANSMISSION electron microscopy, *X-ray diffraction, *RHEOLOGY
Abstract

This work focuses on the possibility of improving performance properties of polylactide films for packaging applications by melt mixing silicate nanoparticles within PLA matrix. Nanocomposites at various silicate loadings were produced by cast-film extrusion using two different temperature profiles. Oxygen barrier and mechanical properties of the produced films were investigated and correlated to their nanostructure through analytical techniques sensitive to different aspect of the same morphology, such as TEM, XRD and rheological analyses. [ABSTRACT FROM AUTHOR]

Published
2010
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