scholarly journals Low density polyethylene/silica nanocomposite foams. Relationship between chemical composition, particle dispersion, cellular structure and physical properties

2016 ◽  
Vol 81 ◽  
pp. 173-185 ◽  
Author(s):  
Ester Laguna-Gutierrez ◽  
Cristina Saiz-Arroyo ◽  
Jose I. Velasco ◽  
Miguel A. Rodriguez-Perez
2013 ◽  
Vol 701 ◽  
pp. 202-206
Author(s):  
Ahmad Aroziki Abdul Aziz ◽  
Sakinah Mohd Alauddin ◽  
Ruzitah Mohd Salleh ◽  
Mohammed Iqbal Shueb

Effect of nanoMagnesium Hydroxide (MH) nloading amount to the mechanical and physical properties of Low Density Polyethylene (LDPE)/ Poly (ethylene-co vinyl acetate)(EVA) nanocomposite has been described and investigated in this paper. The tensile strength results show that increased amount of nanofiller will decrease and deteriorate the mechanical properties. The elongation at break decreased continuously with increasing loading of nanofiller. Generally, mechanical properties become poorer as loading amount increase. Melt Flow Index values for physical properties also provide same trend as mechanical properties results. Increase filler amount reduced MFI values whereby increased resistance to the flow.


Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2311 ◽  
Author(s):  
Zahir Razzaz ◽  
Denis Rodrigue

In this work, hollow fiber porous nanocomposite membranes were successfully prepared by the incorporation of a porous nanoparticle (zeolite 5A) into a blend of linear low-density polyethylene (LLDPE)/low-density polyethylene (LDPE) combined with azodicarbonamide as a chemical blowing agent (CBA). Processing was performed via continuous extrusion using a twin-screw extruder coupled with a calendaring system. The process was firstly optimized in terms of extrusion and post-extrusion conditions, as well as formulation to obtain a good cellular structure (uniform cell size distribution and high cell density). Scanning electron microscopy (SEM) was used to determine the cellular structure as well as nanoparticle dispersion. Then, the samples were characterized in terms of mechanical and thermal stability via tensile tests and thermogravimetric analysis (TGA), as well as differential scanning calorimetry (DSC). The results showed that the zeolite nanoparticles were able to act as effective nucleating agents during the foaming process. However, the optimum nanoparticle content was strongly related to the foaming conditions. Finally, the membrane separation performances were investigated for different gases (CO2, CH4, N2, O2, and H2) showing that the incorporation of porous zeolite significantly improved the gas transport properties of semi-crystalline polyolefin membranes due to lower cell wall thickness (controlling permeability) and improved separation properties (controlling selectivity). These results show that mixed matrix membranes (MMMs) can be cost-effective, easy to process, and efficient in terms of processing rate, especially for the petroleum industry where H2/CH4 and H2/N2 separation/purification are important for hydrogen recovery.


2012 ◽  
Vol 31 (1) ◽  
pp. 31-38 ◽  
Author(s):  
Tapas Kuila ◽  
Saswata Bose ◽  
Ananta Kumar Mishra ◽  
Partha Khanra ◽  
Nam Hoon Kim ◽  
...  

2009 ◽  
Vol 115 (2-3) ◽  
pp. 744-750 ◽  
Author(s):  
Jui-Ming Yeh ◽  
Kung-Chin Chang ◽  
Chih-Wei Peng ◽  
Mei-Chun Lai ◽  
Chih-Bing Hung ◽  
...  

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