Highly oriented single-phase blend films of high- and low-density polyethylene

1988 ◽  
Vol 23 (7) ◽  
pp. 2546-2552 ◽  
Author(s):  
Decai C. Yang ◽  
Jean M. Brady ◽  
Edwin L. Thomas
Keyword(s):  
Single Phase ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Blend Films

Preparation of Linear Low Density Polyethylene/Poly(Ethylene-Co-Vinyl Acetate) Blend Films with Various Transparencies

2009 ◽  
Vol 17 (9) ◽  
pp. 575-580
Author(s):  
Kun Young Kwak ◽  
Young Jae Lee ◽  
Kyeong Il Oh ◽  
Du Hyun Song ◽  
Eun Joo Shin ◽  
...  
Keyword(s):  
Vinyl Acetate ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Blend Films ◽  
Poly Ethylene

Use of Near-Infrared Spectroscopy to Determine the Composition of High-Density/Low-Density Polyethylene Blend Films

1993 ◽  
Vol 47 (2) ◽  
pp. 222-228 ◽  
Author(s):  
Charles E. Miller
Keyword(s):  
Near Infrared ◽  
Principal Component Regression ◽  
Nir Spectroscopy ◽  
Principal Component ◽  
High Density ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Blend Films ◽  
Polyethylene Blend

The ability of near-infrared (NIR) spectroscopy, combined with principal component regression (PCR), to nondestructively determine the blend ratio of high-density polyethylene (HDPE) and low-density polyethylene (LDPE) in extruded films is demonstrated. Results indicate that the NIR spectrum in the region 2100 to 2500 nm can be used to determine the HDPE mass percentage of 60–80- μm-thick film samples to within 2.5%, over a range of 0 to 100%. NIR spectral effects from scattering are important for the determination of the HDPE % for HDPE contents above 50%, and spectral effects from changes in the methyl group concentration and perhaps the PE crystallinity are important for the determination of the HDPE % for HDPE contents below 50%. In addition, a large variation between the spectra of replicate samples, probably caused by variations in the degree or direction of molecular orientation in the samples, was observed.

Low density polyethylene/starch blend films for food packaging applications

2004 ◽  
Vol 23 (1) ◽  
pp. 32-45 ◽  
Author(s):  
Baldev Raj ◽  
Udaya Sankar K. ◽  
Siddaramaiah
Keyword(s):  
Food Packaging ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Blend Films

Thermal degradation and physical aging of linear low density polyethylene and poly(l-lactic acid) blends

2012 ◽  
Vol 32 (1) ◽  
Author(s):  
Gursewak Singh ◽  
Haripada Bhunia ◽  
Pramod K. Bajpai ◽  
Veena Choudhary
Keyword(s):  
Lactic Acid ◽  
Physical Aging ◽  
Hydrolytic Degradation ◽  
Low Density Polyethylene ◽  
Mechanical And Thermal Properties ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Thermal Index ◽  
Blend Films ◽  
Blown Film

Abstract Melt blending of linear low density polyethylene (LLDPE) and poly(l-lactic acid) (PLLA) was performed in an extrusion mixer with post extrusion blown film attachment with and without a compatibilizer-maleic anhydride grafted low density polyethylene. The blend compositions were optimized for tensile properties as per ASTM D 882-91. Based on this, LLDPE 80 (80 wt% LLDPE and 20 wt% PLLA) and M-g-L 80/4 (80 wt% LLDPE, 20 wt% PLLA and 4 parts compatibilizer/100 parts of resin were found to be an optimum composition. The thermal gravimetric profile and thermal endurance of these blends were characterized as per ASTM E1641-07 and E1877-05. The effect of physical aging on mechanical and thermal properties of these blends was evaluated. The PLLA showed the highest Arrhenius activation energy, relative thermal index and strongest thermal endurance of all samples followed by M-g-L 80/4 and LLDPE 80. The thermo-oxidation coefficient improved with addition of compatibilizer in the blends. With increasing pH, the hydrolytic degradation of the blend films increased, while both the tensile strength and the elongation at the break of the blend films decreased.

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