Polymer nanocomposites PE/PE-g-MA/EPDM/nanoZnO and TiO2 dynamically crosslinked with sulphur and accelerators

Alexandrescu, Laurenţia; Sönmez, Maria; Georgescu, Mihai; Niţuică, Mihaela; Ficai, Anton; Trușcă, Roxana; Gurau, Dana

doi:10.1016/j.prostr.2017.07.040

Cited by 7 publications

(6 citation statements)

References 9 publications

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“…The extent of the interface between silica and PEG matrix would cause shorter PEG‐silica interactions. The short interaction (which increases with silica content) is dominated by the enthalpic effect . In this case, the enthalpic interaction is focused near the interface region and enables the tight binding between PEG and q‐SiO 2 .…”

Section: Resultsmentioning

confidence: 99%

Thermal and dynamic mechanical properties of polyethylene glycol/quartz composites for phase change materials

Fauziyah

Hilmi

Zainuri

et al. 2019

J of Applied Polymer Sci

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Polyethylene glycol (PEG)/quartz (denoted as BP/Q) composites have been investigated as candidates of phase change materials (PCMs) due to their thermomechanical properties around the glass transition temperature as well as thermal properties between 30 and 600 C. Quartz (q-SiO 2 ) powders were extracted from local sand in Tanah Laut, Pelaihari, South Kalimantan, Indonesia. The composites were prepared by dispersing q-SiO 2 powders in the PEG matrix followed by the wet mixing process. The thermal properties of the composites were characterized using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), while the thermomechanical properties were examined using a dynamic mechanical analyzer (DMA) in a three-point bending mode around the PEG glass transition temperature range (−100-50 C). The morphology and interface bonding were investigated using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). From the DSC measurement, the endothermic peak of the composites showed a shift of approximately 7-12 C toward higher temperatures than that of the pure polymer. The melting enthalpy values (ΔH m ) of the BP/Q composites covered the required PCM application range, that is, between 139 and 182 J/g. The TGA of the composites showed that thermal degradation occurs in the range of 250-450 C. We found that solid-solid PCMs (ssPCMs) were successfully fabricated with the addition of 10 and 20 wt% q-SiO 2 . From DMA characterization, the BP/Q 20 wt% composite exhibited the maximum E' and the minimum energy dissipation (E"). Its E' value was approximately 250 MPa more than that of the pure PEG. The glass transition (T g ) temperatures of PEG and BP/Q composites (5, 10, and 20 wt%) were around −24.5, −19.1, −17.1, and − 5.3 C, respectively. In addition, the E" and tan δ values decreased with q-SiO 2 filler content. Furthermore, the Cole-Cole plots of the BP/Q composites revealed a better interfacial bonding between the q-SiO 2 and the PEG matrix in the composites with higher silica content. A compact morphology was shown by the BP/Q 20 wt% composite due to high silica concentration.

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Section: Resultsmentioning

confidence: 99%

Thermal and dynamic mechanical properties of polyethylene glycol/quartz composites for phase change materials

Fauziyah

Hilmi

Zainuri

et al. 2019

J of Applied Polymer Sci

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“…There are different types of nanoparticles which can be incorporated in the polymeric matrix, selected according to their properties and their application. ZnO found various applications in plastic industry, medical packaging, cosmetics, medical devices (Saehana et al, 2013), dentistry, and orthopedics, antibacterial coating (Arenas et al, 2013), the textile industry (Bazant et al, 2014;Alexandrescu et al, 2017), etc. Antibacterial activity has been proven on various bacterial strains (Stegarus and Lengyel, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…The paper present the obtaining process and characterization of polymeric composites based on rigid PVC. In order to obtain composites with antibacterial and antifungal properties, zinc oxide nanoparticles (ZnO) (Bazant et al, 2014;Alexandrescu et al, 2017) were used. To improve dispersion in the polymeric matrix of ZnO nanoparticles, they were functionalized (Mallakpour and Darvishzadeh, 2018a;Chung et al, 2016;Mallakpour and Darvishzadeh, 2018b).…”

Section: Introductionmentioning

confidence: 99%

Polymeric Composites Based on Rigid PVC and Zinc Oxide Nanoparticles

Géorgescu¹,

ALEXANDRESCU²,

SÖNMEZ³

et al. 2018

The International Conference on Advanced Materials and Systems

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The paper presents the processing and characterization of polymeric nanocomposites based on polyvinyl chloride plasticized with only 20% diisononyl phthalate for rigid and medical applications. In order to obtain materials with antibacterial and antifungal properties, functionalized zinc oxide nanoparticles were used. The functionalization was achieved with polydimethylsiloxane by ultrasonographic method in a control temperature environment. The influence of 1, 3, and 7 percent of functionalized zinc oxide nanoparticles were tested on the physical-mechanical properties, and the structure. The polymeric composites were processed on a Plasti-Corder Brabender 350 E mixer at 165-180°C and 150-180 revolutions per minute. The results show that adding zinc oxide nanoparticles into the composition led to an improvement in tear resistance, and tensile strength. Abrasion resistance present extremely good values. The FTIR spectra of the samples indicate that the new composites have a stable structure, due to a very good compatibility / interaction with the polymer matrix, the plasticizer does not tend to migrate to the surface.

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“…There are different types of nanoparticles which may be incorporated in the polymeric matrix, selected according to their properties and their application. ZnO found various applications in everyday life, such as the rubber and plastic industry, medical packaging, cosmetics, medical devices (Saehana et al, 2013), dentistry, and orthopedics, antibacterial coating (Arenas et al, 2013), the textile industry (Bazant et al, 2014;Alexandrescu et al, 2017), etc. Antibacterial activity has been proven on various bacterial strains (Staphylococcus aureus, Staphylococcus epidermidis, E. coli, Listeria monocytogenes, Bacillus subtilis, Pseudomonas fluorescens, Pseudomonas aeruginosa, Salmonella enteritidis, Salmonella typhimurium etc.)…”

Section: Introductionmentioning

confidence: 99%

Antibacterial Polymeric Nanocomposites with Matrix of PET and TiO2 Functionalized Nanoparticles with Application in Medical and Food Industry

Alexandrescu¹,

Sönmez²,

Georgescu³

et al. 2018

The International Conference on Advanced Materials and Systems

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Thermoplastic polyesters represent an important class of polymers used in a variety of products and applications, one of which is poly (ethylene terephthalate) (PET). Currently, PET is the most cost-effective polyester. PET can be processed in a variety of domestic and industrial shapes and products by melt processing techniques such as spinning, extrusion, injection, blowing, thermoforming. Polymer composite materials are systems consisting of one or more discontinuous phases dispersed in a continuous phase. In this paper, elastomeric nanocompound materials were selected, due to performance properties such as: antimicrobial, resistance to aggressive chemical agents, mechanical properties, especially hardness which, depending on the degree of plastification, can present values from very low to high 30-100°Sh D, thermal, impermeability, resilience, low density, elasticity, thermostability, processability, impact resistance etc. The new compounds produced by a simple and efficient technology for obtaining polyethylene terephthalate (PET) composite, TiO2 functionalized nanoparticles, provide flexibility in adapting superficial chemistry and molecular structure to the polymer / nanoparticle interface. These nanomorphic molecules form the "molecular bridges" between individually dispersed compounding agents and the continuous phase polymer matrix resulting in a maximized performance of the composite material by optimized interface compatibility and bonding.

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Polymer nanocomposites PE/PE-g-MA/EPDM/nanoZnO and TiO2 dynamically crosslinked with sulphur and accelerators

Cited by 7 publications

References 9 publications

Thermal and dynamic mechanical properties of polyethylene glycol/quartz composites for phase change materials

Thermal and dynamic mechanical properties of polyethylene glycol/quartz composites for phase change materials

Polymeric Composites Based on Rigid PVC and Zinc Oxide Nanoparticles

Antibacterial Polymeric Nanocomposites with Matrix of PET and TiO2 Functionalized Nanoparticles with Application in Medical and Food Industry

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