Permeation of Selected Organic Compounds Through Untreated and Barrier-Treated High-Density Polyethylene

1990 ◽  
Vol 215 ◽  
Author(s):  
Daniel J. Kathios ◽  
Robert M. Ziff
Keyword(s):  
Organic Compounds ◽  
Aromatic Hydrocarbons ◽  
High Density Polyethylene ◽  
Permeation Rate ◽  
High Density ◽  
Chemical Characteristics ◽  
Individual Contributions ◽  
The Individual ◽  
And Diffusion

AbstractThe permeation rates of alkanes, alcohols, and aromatic hydrocarbons through untreated, fluorinated, and sulfonated high-density polyethylene (HDPE) were measured at a variety of temperatures and solvent compositions. The results were then analyzed to separate the individual contributions that solubility and diffusion make to the overall permeation rate. These results are discussed in terms of the chemical characteristics of the permeating constituents, and the barrier treatments on the HDPE surface.

scholarly journals DSC ANALYSIS OF NOVEL POLYETHILENE BIOFILM CARRIERS

2019 ◽  
Vol 2019 ◽  
pp. 204-207
Author(s):  
Ovidiu IORDACHE ◽  
Irina SANDULACHE ◽  
Ioana Corina MOGA ◽  
Cornelia MITRAN ◽  
Lucia SECAREANU ◽  
...  
Keyword(s):  
Organic Compounds ◽  
High Density Polyethylene ◽  
High Density ◽  
Biofilm Reactor ◽  
Treated Wastewater ◽  
Dsc Analysis ◽  
Treatment Technology ◽  
Inorganic Substances ◽  
Biofilm Development ◽  
Inorganic And Organic

MBBR (Moving Bed Biofilm Reactor) wastewater treatment technology relies heavily on the type of used HDPE (High Density Polyethylene) carriers, that use immobilized biofilm for the removal of organic and inorganic substances in the treated wastewater. Present work explored DSC (Differential Scanning Calorimetry) analysis on four novel variants of HDPE carriers. DSC is a thermoanalytical technique in which the difference in the amount of heat required to increase the temperature of a sample and reference is measured as a function of temperature. The four novel carriers were composed of novel recipes of mixes of polyethylene with inorganic and organic compounds (patent pending), designed for greater microbial biofilm development. DSC analysis. DSC analysis was carried out in order to understand the behavior of the developed carriers, in various scenarios. High density polyethylene (HDPE) is a weak, semi- crystalline, thermoplastic polymer that is part of the polyolefin class. Analysis revealed that the temperatures at which the melting process of crystalline zones in the macromolecular structures occur, gradually decreases from the sample with only HDPE in composition to the one with addition of a mix of inorganic and organic compounds.

Production of aromatic hydrocarbons by hydro-liquefaction of high-density polyethylene (HDPE) over Ni/HZSM-5

2018 ◽  
Vol 136 ◽  
pp. 208-214 ◽  
Author(s):  
Zeyou Pan ◽  
Xiangfei Xue ◽  
Changsen Zhang ◽  
Dengtai Wang ◽  
Yunyun Xie ◽  
...  
Keyword(s):  
Aromatic Hydrocarbons ◽  
High Density Polyethylene ◽  
High Density

scholarly journals Effect of the surface finishing methods on particleboard volatile organic compounds and formaldehyde emission

BioResources ◽  
2020 ◽  
Vol 15 (3) ◽  
pp. 5450-5463 ◽  
Author(s):  
Feng Chen ◽  
Jun Shen ◽  
Xinghua Xia
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
High Density Polyethylene ◽  
Indoor Air Pollution ◽  
Formaldehyde Emission ◽  
High Density ◽  
Surface Finishing ◽  
Volatile Organic ◽  
Total Volatile Organic Compounds ◽  
Water Borne

Chemical contaminants from wood-based panels, such as volatile organic compounds (VOCs) and formaldehyde, are the main sources of indoor air pollution. The particleboards were used as the substrate and five common finishing methods, including melamine-impregnated paper, high-density polyethylene decorative film, wood veneer, polypropylene water borne paintings coatings, and polyurethane water borne paintings coatings, were selected for this study. The emission curves in the first 6 h and the equilibrium concentrations of the total volatile organic compounds (TVOC) and formaldehyde processed with the finishing wood-based panel method for 24 h were obtained and measured using an airtight environmental chamber. The ingredients of the VOCs were investigated using the small chamber method and gas chromatography and mass spectrometry (GC/MS). The results indicated that the finishing methods were effective for reducing the emissions of TVOC (except the water borne coating) and formaldehyde of the particleboards. High density polyethylene film was the best finishing material to reduce the release of TVOC. The concentration of the veneered particleboard from the third to the tenth hour was higher than the unfinished particleboards. The veneered particleboard released six volatile ingredients to a lesser extent than the unfinished particleboard.

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