Structure and oxygen-barrier properties of (linear low-density polyethylene/ethylene-vinyl alcohol copolymer)/linear low-density polyethylene composite films prepared by microlayer coextrusion

2015 ◽  
Vol 132 (27) ◽  
pp. n/a-n/a ◽  
Author(s):  
Huijun Su ◽  
Juan Xue ◽  
Peiling Cai ◽  
Jiang Li ◽  
Shaoyun Guo
Keyword(s):  
Vinyl Alcohol ◽  
Composite Films ◽  
Barrier Properties ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Oxygen Barrier ◽  
Linear Low Density Polyethylene ◽  
Ethylene Vinyl Alcohol ◽  
Polyethylene Composite ◽  
Ethylene Vinyl Alcohol Copolymer

Barrier, mechanical, and thermal properties of the three-layered co-extruded blown polyethylene/ethylene–vinyl alcohol/low density polyethylene film without tie layers

2015 ◽  
Vol 30 (6) ◽  
pp. 794-807 ◽  
Author(s):  
Changfeng Ge ◽  
Kai Lei ◽  
Robert Aldi
Keyword(s):  
Vinyl Alcohol ◽  
Control Sample ◽  
Barrier Properties ◽  
Peel Strength ◽  
Low Density Polyethylene ◽  
Mechanical And Thermal Properties ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Ethylene Vinyl Alcohol ◽  
Blown Film

This article investigates three-layer co-extruded blown film comprised of low-density polyethylene (LDPE)/ethylene–vinyl alcohol (EVOH)/LDPE without adhesion layers. Various thicknesses of pure EVOH were sandwiched by outer LDPE layers blended with linear low-density polyethylene-grafted-maleic anhydride (LLDPE- g-MAH) as compatibilizer in concentrations from 0 wt% to 2.0 wt%. The study found that a mere 3-μ EVOH layer can achieve a 180 times improvement of oxygen barrier properties as compared to the control sample. When the EVOH loading is 10–15 wt% of the total film mass, the addition of LLDPE- g-MAH into the outer layers indicated a positive synergistic effect by enhancing barrier properties. In contrast, when the EVOH loadings are at 5 wt% and 7.5 wt%, the barrier properties of the film was reduced. Layer-to-layer interaction between the LDPE and EVOH was notably improved as demonstrated by a 26–42% increase of interlaminate peel strength in the presence of 0.5–2 wt% LLDPE- g-MAH in all samples. Congruently, the introduction of the LLDPE- g-MAH into the outer LDPE layers also resulted in an increased dart impact toughness and tensile strength for the film. The EVOH crystallinity showed a reduction after adding LLDPE- g-MAH, particularly apparent for the lower EVOH concentrations.

scholarly journals A study of the barrier properties of polyethylene coated with a nanocellulose/magnetite composite film

2016 ◽  
Vol 81 (5) ◽  
pp. 589-605 ◽  
Author(s):  
Nenad Djordjevic ◽  
Aleksandar Marinkovic ◽  
Jasmina Nikolic ◽  
Sasa Drmanic ◽  
Milica Rancic ◽  
...  
Keyword(s):  
Surface Modification ◽  
Maleic Anhydride ◽  
Hybrid Materials ◽  
Significant Contribution ◽  
Barrier Properties ◽  
Chemical Activity ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Oxygen Barrier ◽  
Magnetite Layer

The morphological, thermal and barrier properties of low-density polyethylene/polycaprolactone-modified nanocellulose hybrid materials were investigated in this paper. Nanonocelulose/magnetite (NC-Fe3O4) nanocomposite and maleic acid functionalized NC/magnetite (NCMA-Fe3O4) nanocomposite were prepared and used as filler at various concentrations (5, 10 and 15 wt. %) in polycaprolactone (PCL) layer. PE was coated with PCL/NC/magnetite layer. The addition of the filler did not unfavorably affect the inherent properties of the polymer, especially its barrier properties. Oxygen permeation measurements show that the oxygen barrier properties of magnetite enriched PCL film were improved due to chemical activity of added material. The highest level of barrier capacity was observed for PE samples coated with PCL based composite with NCMA-Fe3O4 micro/-nanofiller, which implies the significant contribution of nanocellulose surface modification with maleic anhydride residue to improved barrier properties.

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