Correlation between rheological and mechanical properties of black PE100 compounds – Effect of carbon black masterbatch

Pircheraghi, Gholamreza; Sarafpour, Amirhosein; Rashedi, Reza; Afzali, Kamal; Adibfar, Mohammad

doi:10.3144/expresspolymlett.2017.60

Cited by 20 publications

(20 citation statements)

References 31 publications

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“…The same phenomena would be observed in polyethylene melts with very broad molecular weight distribution. On the other hand, in PE100‐MN sample because of the presence of lubricants and lower molecular weight of CB carrier, some potential entanglements of long chains would not be formed, resulting in decreased viscosity and increased Newtonian region, or a higher a parameter in Carreau‐Yasuda model.…”

Section: Resultsmentioning

confidence: 99%

“…Values of Avrami index vs (A) consistency constant in power law model and (B) zero shear viscosity and parameter a obtained from Carreau-Yasuda model illustration of PE100-MPa sample which does not have a preferenceof spherulite growth. One can assume that these different microstructures would show different mechanical properties, which is addressed in our previous work [8]. 4 | CONCLUSIONEffects of different CB concentrated dispersions on microstructure and crystallization behavior of bimodal polyethylene black compounds were studied.…”

mentioning

confidence: 92%

“…Further details of sample preparation, as well as used CB masterbatches can be found in our previous work. [8] The composition of the permanganic chemical etchant (H 2 SO 4 :H 3 PO 4 :water = 5:2:1 and 1 wt% KMnO 4 ) used for electron microscopy was obtained from relevant reference [23]. Samples' code name and composition are also given in Table 1.…”

Section: Introductionmentioning

confidence: 99%

“…In our previous study, we have discussed effects of different grades of CB masterbatch on rheological and mechanical properties of PE100 black compounds. [8] The crystallization of polyethylene can be of great importance because of the close relationship between the semi-crystalline structure and its mechanical properties and performance. [9][10][11] It is shown that preferential placement of short chain branches (SCB) on low-or high-molecular weight fraction of a bimodal polyethylene system can significantly alter its mechanical properties, with short chains on the high molecular weight fraction exhibiting excellent resistance to slow crack growth (SCG) by establishing inter-lamellar tie molecules.…”

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confidence: 99%

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Correlation between isothermal crystallization and morphological/rheological properties of bimodal polyethylene/carbon black systems

Sarafpour

Pircheraghi

Rashedi³

et al. 2018

Polymer Crystallization

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Studying factors that can cause changes in microstructure and different properties of polyethylene pipe materials are important to better predict pipe behavior. In this study, bimodal polyethylene compounds were prepared using three different grades of carbon black (CB) concentrated dispersion to investigate the role of CB carrier's molecular weight on microstructure, crystallization, and rheological properties of samples. Isothermal crystallization and Avrami equation showed the nucleating effect of CB and a decrease in overall crystallinity caused by CB particles, with no major effect of carrier molecular weight on polyethylene unit cell parameters, confirmed with WAXD measurements. Similarly, it was revealed by FE‐SEM images that the higher the molecular weight of CB carrier, the lower the compound's ability to form three‐dimensional spherulites. The melt miscibility of samples was evaluated based on rheological properties, while a correlation between rheological parameters and Avrami index was observed. It is concluded that a small amount of CB carrier can change the balanced molecular weight distribution of bimodal polyethylene resin and strongly influence crystallization behavior and microstructure development of samples. The microstructure of bimodal black polyethylene compounds can determine their properties, especially long‐term performance like resistance to slow crack growth.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Correlation between isothermal crystallization and morphological/rheological properties of bimodal polyethylene/carbon black systems

Sarafpour

Pircheraghi

Rashedi³

et al. 2018

Polymer Crystallization

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“…Masterbatch are widely used to improve the processing characteristics, physical properties of the compounds, and to disperse fillers uniformly concentrated in the polymer matrix [3,6]. In different studies, the masterbatch technique has been used to obtain uniform dispersions of carbon nanotubes in polymers such as polycarbonate and polypropylene [7]; to increase the dispersion of carbon black in ethyl poly terephthalate (PET) and polypropylene (PP) [6,8] and to provide color to polymers such as polyethylene (PE) [9].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of a biodegradable color concentrate in bags for coffee seedlings

Parra-Campos

Alban-Bolaños

Castillo

et al. 2020

DYNA

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The aim of this study was to evaluate different formulations of a biodegradable black concentrate obtained from cassava starch and carbon black, on the mechanical properties, color, and water absorption of a film destined to the production of biodegradable bags for coffee seedlings. The modulus of elasticity, tensile strength and elongation properties is found to show significant variation due to the pigment, plasticizer, and lubricant concentration, both longitudinally and transversely of the film, the treatment being 40% pigment with the absence of plasticizer and lubricant for the pigment, which presented greater integrity in the mechanical properties evaluated in both directions. It is also noticeable that the different masterbatch formulations had an influence on the changes in the color parameters and weight gain of the film by the influence of water absorption.

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The UV stability of polyethylene pipes with different comonomer content: Effect of carbon black masterbatch

Davand

Hassanajili

Rahimpour

et al. 2022

Polymer Engineering & Sci

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The relationship between career resin of carbon black (CB) masterbatch and the performance of bimodal polyethylene pipes (PE100) under ultraviolet (UV) irradiation and the long-term stability of black PE100 with different comonomer content have been investigated. For this purpose, two different CB masterbatches varying in carrier resin were selected and added to two PE100 pipes.Samples were exposed to UV irradiation, and then thermal, mechanical, and rheological properties were explored using differential scanning coloriemetry (DSC), tensile, and rheometry analyses. Additionally, Fourier transformed-infrared spectroscopy (FTIR) has been performed to characterize the structural changes of PE100 samples under UV irradiation. According to rheological results, the PE100 sample containing more comonomer underwent a higher degree of degradation. Thermal and mechanical results reveal that the masterbatch composed of highdensity polyethylene (HDPE) as carrier resin has a better influence on PE pipes' UV stability with less comonomer content.

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Correlation between rheological and mechanical properties of black PE100 compounds – Effect of carbon black masterbatch

Cited by 20 publications

References 31 publications

Correlation between isothermal crystallization and morphological/rheological properties of bimodal polyethylene/carbon black systems

Correlation between isothermal crystallization and morphological/rheological properties of bimodal polyethylene/carbon black systems

Evaluation of a biodegradable color concentrate in bags for coffee seedlings

The UV stability of polyethylene pipes with different comonomer content: Effect of carbon black masterbatch

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