Investigation of Melt Flow Index and Impact Strength of Foamed LLDPE for Rotational Moulding Process

Ramkumar, Pl.; Kulkarni, Deepak; Abhijit, V.V.R.; Cherukumudi, Aditya

doi:10.1016/j.mspro.2014.07.046

Cited by 28 publications

(20 citation statements)

References 9 publications

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“…This phenomenon was mainly caused by different MFI, the MFI of OX4 was 3.8, and it was higher than the MFI of OX8 (2.7). The higher MFI of polyethylene, the lower viscosity, and resulted in the higher gas diffusion rate [15]. After 70 seconds, cross-linking reaction started and the pressure rate slowed down, the pressure rate of OX4 slower than OX6, which was opposite with the initial pressure rate discipline.…”

Section: Effect Of Xpe On Cellular Structurementioning

confidence: 99%

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Study on Cellular Structure and Mechanical Property of Foaming/Cross-linking Polyethylene System

Xia

Dong

2020

E3S Web Conf.

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The cellular structure and mechanical property of a sequential foaming/cross-linking polyethylene system were studied in this work. By adjusting the components, foaming starts before the cross-linking reaction initiated and the melt strength increases during the foaming process. Rubber Process Analyzer (RPA) was used for the in situ monitoring and measuring of the foaming and cross-linking process. The cellular structure and expansion ratio of polyethylene foam can be modulated by controlling the type and ratio of foaming agent and cross-linking agent, as well as the foaming/cross-linking conditions. The mechanical strength was tested by universal mechanical testing machine, the melt strength were also characterized and analyzed. Experimental results demonstrated that the cross-linking controlled the cellular size and improved mechanical strength.

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Section: Effect Of Xpe On Cellular Structurementioning

confidence: 99%

“…Similarly, it also has great influence on the dispersion of the foaming agent in the polyethylene, the gas diffusion speed, the interfacial tension between gas and liquid, and melt strength properties [15]. In this paper, 7042 was used as the dilution resin of XPE.…”

Section: Flexural Modulus Testmentioning

confidence: 99%

Study on Cellular Structure and Mechanical Property of Foaming/Cross-linking Polyethylene System

Xia

Dong

2020

E3S Web Conf.

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“…In the case of rotomolding, polyethylene with a high MFI is desirable because of its easier melt flow, whereas a low MFI produces a tougher part with greater resistance to cracking caused by environmental stress. 76,84 According to Ramkumar et al. 84 and the Braskem 85 company website, rotomolding-specific linear polyethylene have an MFI between 3.3 and 5.5 g/10 min (190°C/2.16 kg), based on ASTM D1238-13.…”

Section: Technical Aspects Of Rotomoldingmentioning

confidence: 99%

Rotomolding and polyethylene composites with rotomolded lignocellulosic materials: A review

León

Escócio

Visconte

et al. 2020

Journal of Reinforced Plastics and Composites

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Rotomolding is a versatile process used in the manufacture of thermoplastic polymeric materials to produce large hollow plastic parts. The aim of this review article was to discuss the rotomolding process and show the properties of the polyethylene composite and rotomolded lignocellulosic fibers, which are processed for prolonged periods under temperature. The main process parameters studied are the shaft speed of the equipment, molding temperature, polymer particle size, polymer melt flow index, and amount of material, which must be well controlled to achieve a non-degraded product with homogeneous thickness and no porosity. Rotomolded composites containing sisal, pine, coir, banana, flax, and maple wood fibers, among others, have been evaluated primarily for their mechanical (impact, flexural, and tensile strength) and morphological properties. The type, content, and treatment of lignocellulosic fillers are the most widely studied variables in polyethylene-based rotomolded composites. Fiber content was the variable that most influenced mechanical properties, particularly impact strength and hardness due to the voids formed by the hydrodynamic volume between the polymer matrix and lignocellulosic filler. Chemical treatment of the fiber by mercerization with NaOH made it more hydrophobic and the addition of maleic anhydride-grafted polyethylene as a coupling agent improved the interfacial adhesion between the non-polar polymer matrix and polar filler. However, the best mechanical property results were obtained with the use of maleic anhydride-grafted polyethylene.

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“…Some research studies feature these differentiated properties are a result to interaction in the molecular scale, in the interface between nanoparticles and polymer matrix .…”

Section: Introductionmentioning

confidence: 99%

Thermomorphological analysis of Al₂O₃/HDPE nanocomposites: One approach in function of the processing and vinyltrimethoxysilane (VTMS) content

Ladeira

Furtado²,

Pacheco

2019

Polymer Engineering & Sci

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The present study assesses the influence of processing and adding alumina (Al2O3) nanoparticles functionalized with vinyltrimethoxysilane (VTMS) on high‐density polyethylene (HDPE) matrix. The model proposed by Henk, Kortsen, and Kvarts is used to calculate the ideal alumina nanoparticle concentration, in order to provide a larger interface area with lower agglomeration. Two different processing techniques are used to add the alumina nanoparticles functionalized with VTMS to the HDPE: direct blending and masterbatches applying the same processing extrusion parameters'. The alumina's nanoparticle functionalization with VTMS is confirmed by Fourier transform infrared spectroscopy analysis. The MFI is measured and nanoparticles dispersion is evaluated by scanning electron microscopy and by energy dispersive spectroscopy. Thermal behavior is measured by thermogravimetric analysis and differential scanning calorimetry. The addition of Al2O3 nanoparticles increases the thermal stability of the nanocomposites. Functionalization with VTMS provides improve adhesion to the polymer matrix, while the masterbatch processing technique promotes better alumina nanoparticle dispersion in the HDPE matrix and produce high crystalline composites. © 2019 Society of Plastics Engineers POLYM. ENG. SCI., 59:1332–1343 2019. © 2019 Society of Plastics Engineers

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Investigation of Melt Flow Index and Impact Strength of Foamed LLDPE for Rotational Moulding Process

Cited by 28 publications

References 9 publications

Study on Cellular Structure and Mechanical Property of Foaming/Cross-linking Polyethylene System

Study on Cellular Structure and Mechanical Property of Foaming/Cross-linking Polyethylene System

Rotomolding and polyethylene composites with rotomolded lignocellulosic materials: A review

Thermomorphological analysis of Al₂O₃/HDPE nanocomposites: One approach in function of the processing and vinyltrimethoxysilane (VTMS) content

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Investigation of Melt Flow Index and Impact Strength of Foamed LLDPE for Rotational Moulding Process

Cited by 28 publications

References 9 publications

Study on Cellular Structure and Mechanical Property of Foaming/Cross-linking Polyethylene System

Study on Cellular Structure and Mechanical Property of Foaming/Cross-linking Polyethylene System

Rotomolding and polyethylene composites with rotomolded lignocellulosic materials: A review

Thermomorphological analysis of Al2O3/HDPE nanocomposites: One approach in function of the processing and vinyltrimethoxysilane (VTMS) content

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Product

Resources

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Thermomorphological analysis of Al₂O₃/HDPE nanocomposites: One approach in function of the processing and vinyltrimethoxysilane (VTMS) content