Diffusion of nitrogen gas through polyethylene based films

Abstract

Polyethylene-based films can be used as sealant materials at room temperature in packaging applications. They can be also melted and sealed with glass, acting as sealant material in solar cells. The polyethylene-based polymers investigated in this paper are a linear low-density polyethylene modified with maleic anhydride (or PE-MAH), and an ethylene acrylic acid copolymer (or EMAA). Measurements of nitrogen gas diffusion coefficient (D) have been performed at three different temperatures ranging between 23 C and 32 C. The experimental apparatus used to measure the diffusion coefficients is original compared with other commonly used. The obtained D results have been correlated with the polymeric structure and morphology by means of differential scanning calorimetry (DSC), thermogravimetric-analyses (TGA), X-ray diffraction (XRD), and scanning electron microscopy (SEM) experimental analyses. Furthermore, D-coefficients are compared with the literature data of other polyethylenes with different structural organization (HDPE, LLDPE, and LDPE). The thermal activation energy is evaluated for the two polymers. Arrhenius plot has been used to calculate the activation energies of both polymers and to predict the D-coefficient at other temperatures, close to these analyzed.

Preparation, characterization, and life cycle assessment of banana rachis-recycled high-density polyethylene composites

“…The HDPE polymer presents two characteristic peaks of polyethylene (C 2 H 4 ). These peaks can be found at 2θ of 24.78° and 27.58° 50 – 52 . Figure 2 shows the XRD results of rHDPE composites.…”

Comparison of Two Methods for Measuring the Temperature Dependence of H2 Permeation Parameters in Nitrile Butadiene Rubber Polymer Composites Blended with Fillers: The Volumetric Analysis Method and the Differential Pressure Method

“…The diffusion coefficient in a polymer composite is a function of the shape and size of the penetrant molecule, the kinetic diameter of the gas molecule, and the filler species [ 1 , 2 ]. The diffusion characteristics of gas molecules through polymers are very important for various scientific and engineering fields, such as the medical, textile, membrane separation, food packaging, solvent extraction, contaminant extraction, and gas sealing industries [ 3 , 4 , 5 , 6 ].…”

Investigation of the Gas Permeation Properties Using the Volumetric Analysis Technique for Polyethylene Materials Enriched with Pure Gases under High Pressure: H2, He, N2, O2 and Ar

“…Polyethylene (PE) materials play a crucial role in a wide range of industrial applications across a variety of sectors, including packaging, electronics, gas transportation, storage and medical devices [1][2][3][4][5][6][7]. In the packaging industry, PE ensures product safety, extends shelf life and contributes to a sustainable supply chain due to its versatility, costeffectiveness and excellent barrier properties [8].…”

“…The permeation of gas molecules into polymers is primarily a function of the polymer structure, gas penetrant, temperature and applied pressure gradient [7]. In particular, the relationship between the polymer structure and gas permeability has been extensively investigated.…”