Properties and thermo-switch behaviour of LDPE mixed with carbon black, zinc metal and paraffin wax

Motloung, Benison T.; Dudić, Duško; Mofokeng, J.P.; Luyt, Adriaan S.

doi:10.1007/s10965-017-1205-8

Cited by 9 publications

(9 citation statements)

References 31 publications

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“…In contrast, the crystallization temperatures corresponding to LLDPE show a slight increase with the content of carbon structures, reaching higher crystallization temperatures for films with MWCNTs and graphene. This behavior has been attributed to heterogeneous nucleation induced by carbon nanostructures 40,43 . Table 3 shows the melting enthalpies and crystallinity of the films with and without carbon structures.…”

Section: Resultsmentioning

confidence: 96%

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Influence of carbon structures on the properties and photodegradation of LDPE/LLDPE films

López‐Martínez¹,

Martínez‐Colunga²,

Ramı́rez-Vargas³

et al. 2022

Polymers for Advanced Techs

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The effect of different carbon structures on the properties of low density polyethylene film and linear low density polyethylene blends (LDPE/LLDPE) subjected to artificial weathering, was studied. The carbon structures used were carbon black (CB), multi wall carbon nanotubes (MWCNT) and Graphene nanoparticles (GNP), at various loadings: 0.05, 0.1, 0.3, 0.5, 1.0, and 2 wt%. The PE-Carbon structure composite films were characterized by optical microscopy (MOP), Haze, visible light transmission, UV-visible, thermogravimetric analysis (TGA), melt flow determinations (MFI) and tensile properties. Weathering measurements were evaluated in a QUV panel chamber with UV fluorescent lamps. The films degradation was analyzed following the change in carbonyl index of FTIR spectra, mechanical properties, and molecular weight. A noticeable better dispersion of CB and CNT particles in polyethylene matrix was observed compared with GNP. MWCNTs and CB produced high Haze and low visible light transmission. Thermal stability measured by TGA increased with the presence of GNP and CB. The crystallinity, melting, and crystallinity temperature (T m and T c ) of the polymers increased with MWCNT and GNP. All the films with carbon structures presented an increase in the modulus of elasticity, with CB giving the highest elastic modulus. Artificial weathering of films with carbon structures showed that CB particles and CNT provided the highest UV protection to polyethylene, with a noticeable increase in low molecular weights and a retention in tensile strength and elongation at break which was reflected in maintaining their flexibility. Films with CNT showed the least significant changes in their properties, being more resistant to photo-degradation.

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Section: Resultsmentioning

confidence: 96%

“…This behavior has been attributed to heterogeneous nucleation induced by carbon nanostructures. 40,43 Table 3 shows the melting enthalpies and crystallinity of the films with and without carbon structures. The crystallinity was calculated according to the equation:…”

Section: Resultsmentioning

confidence: 99%

Influence of carbon structures on the properties and photodegradation of LDPE/LLDPE films

López‐Martínez¹,

Martínez‐Colunga²,

Ramı́rez-Vargas³

et al. 2022

Polymers for Advanced Techs

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“…Significantly higher increase in conductivity of the samples treated in salt solutions at room temperature (black in Figure 5) than the conductivities of the samples treated at 80 C (red in Figure 5) are rather strange. Based on the results in Figure 1 and the pronounced coefficient of thermal expansion of polyolefins [28], it was expected that higher temperatures of polymer treatment in solutions will contribute to a better diffusion of impurities and thus to a higher conductivity of the polymer. However, the results in Figure 5 suggest an opposite effect.…”

Section: Resultsmentioning

confidence: 99%

Ionic diffusion in iPP: DC electrical conductivity

Škipina

Petronijević

Luyt

et al. 2020

Surfaces and Interfaces

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“…The nucleation effect is the highest at intermediate PC content (i.e., 13wt.%), however, this might not suggest optimum miscibility. Elsewhere in literature [37], carbon black was fairly dispersed in a polyolefin matrix and gave rise to low melting enthalpy values, in contrast, zinc metal particles formed agglomerates in the same matrix and showed a high nucleation efficiency which led to a high crystallinity index as compared to carbon black. This is a clear indication that the nucleation ability of a dispersed phase should not be mistaken for its miscibility with a continuous phase.…”

Section: Structural Properties: X-ray Diffraction Analysis (Xrd)mentioning

confidence: 97%

Miscibility effect of biodegradable aliphatic poly(butylene succinate)/aromatic polycarbonate blends

Gumede

Shingange

Mbule

et al. 2021

Preprint

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Biodegradable polymers are gaining attention for applications in drug delivery, tissue engineering, and wound management. Methods for enhancing their potential in these applications include blending non-biodegradable polymers with biodegradable polymers to form blends with unique properties. Herein we report on the effect of non-biodegradable PC on the physical, mechanical, and thermal properties of biodegradable PBS. The PBS/PC blends contained 3, 13, and 27 wt.% PC and were prepared by melt extrusion. The FTIR results revealed apparent compatibility between the two polymers. Even though the blends are compatible, the extent of miscibility depends on how well PC is dispersed in the PBS matrix. According to the SEM micrographs, adding 3 wt.% PC resulted in a miscible polymer blend. However, above this content, agglomeration was observed suggesting possible phase segregation. XRD results revealed peak shifts to higher angles and new peaks forming between

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Properties and thermo-switch behaviour of LDPE mixed with carbon black, zinc metal and paraffin wax

Cited by 9 publications

References 31 publications

Influence of carbon structures on the properties and photodegradation of LDPE/LLDPE films

Influence of carbon structures on the properties and photodegradation of LDPE/LLDPE films

Ionic diffusion in iPP: DC electrical conductivity

Miscibility effect of biodegradable aliphatic poly(butylene succinate)/aromatic polycarbonate blends

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