Effect of Blend Ratio of h-LLDPE and LDPE on Tear Properties of Blown Films
-
K. Mezghani
, S. Furquan , S. H. Tabatabaei and A. Ajji
Abstract
In the present study, blown films of h-LLDPE, LDPE, and their blends were produced using a twin screw extruder. The tear properties of all films were determined in the machine direction (MD) and the transverse direction (TD). On one hand, similar values of the MD tear-resistance for the two virgin polymers, h-LLDPE and LDPE, were measured to be 100 and 120 kN/m, respectively. On the other hand, the TD tear-resistance value of h-LLDPE was 180 kN/m, four times higher than that of LDPE, 45 kN/m. It was observed that small additions of LDPE (5 to 20 wt.%) to h-LLDPE produced blends with better TD tear-resistance films, 400 kN/m. The main reason for this large increase in tear-resistance was attributed to the morphological changes induced by the addition of the LDPE polymer, as shown by SEM, FTIR, and birefringence techniques.
References
ASTM-D882, “Standard Test Method for Tensile Properties of Thin Plastic Sheeting”, in Annual Book of ASTM Standards, Philadelphia, PA (1995)Search in Google Scholar
ASTM-D1922, “Standard Test Method for Propagation Tear Resistance of Plastic Film and Thin Sheeting by Pendulum Method,” in Annual Book of ASTM Standards, Philadelphia, PA (1995)Search in Google Scholar
Crawford, R. J.: Plastics Engineering. 3rd Edition, Butterworth Heinemann, Oxford(2005)Search in Google Scholar
Fang, Y. L., et al., “Rheological Effects of Polyethylenes in Film Blowing”. Polym. Eng. Sci., 43, 1391–1406(2003), http://dx.doi.org/10.1002/pen.10118Search in Google Scholar
Fang, Y. L., et al., “Properties of mLLDPE/LDPE Blends in Film Blowing”. Polym. Eng. Sci., 45, 343–353(2005), http://dx.doi.org/10.1002/pen.20279Search in Google Scholar
Fatahi, S., et al., “Investigation on the Structure and Properties of Different PE Blown Films”. Int. Polym. Proc., 22, 334–345(2007), http://dx.doi.org/10.3139/217.0009Search in Google Scholar
Fu, Q., et al., “Understanding of the Tensile Deformation in HDPE/LDPE Blends Based on their Crystal Structure and Phase Morphology”. Polymer, 44, 1927–1933(2003), http://dx.doi.org/10.1016/S0032-3861(02)00940-0Search in Google Scholar
Huizenga, D., et al., “Optimized LLDPE/LDPE Film Properties through Correlation of Blend Analyses”, J. Plastic Film and Sheeting, 6, 318–326(1990), http://dx.doi.org/10.1177/875608799000600407Search in Google Scholar
Keller, A., Machin, M. J., “Oriented Crystallization in Polymers”. J. Macromol. Sci., Part B, 1, 41–91(1967)10.1080/00222346708212739Search in Google Scholar
Kim, S., et al., “Dynamics and Criteria for Bubble Instabilities in a Single Layer Film Blowing Extrusion”. Polym. Eng. Sci., 44, 283–302(2004), http://dx.doi.org/10.1002/pen.20027Search in Google Scholar
Lu, J., et al., “Dual Crystalline Texture in HDPE Blown Films and its Implication on Mechanical Properties”. Polymer, 42, 4635–4646(2001), http://dx.doi.org/10.1016/S0032-3861(00)00719-9Search in Google Scholar
Mark, J. E.: Physical Properties of Polymers Handbook. American Institute of Physics, New York(1996)Search in Google Scholar
Mezghani, K., et al., “Lamellar Thickening and the Equilibrium Melting-point of Polypropylene”. Macromolecules, 27, 997–1002(1994), http://dx.doi.org/10.1021/ma00082a017Search in Google Scholar
Micic, P., et al., “Transient Elongational Viscosity of LLDPE/LDPE Blends and its Relevance to Bubble Stability in the Film Blowing Process”. Polym. Eng. Sci., 38, 1685–1693(1998)http://dx.doi.org/10.1002/pen.10339Search in Google Scholar
Micic, P., Bhattacharya, S. N., “Rheology of LLDPE, LDPE and LLDPE/LDPE Blends and its Relevance to the Film Blowing Process”. Polym. Int., 49, 1580–1589(2000)http://dx.doi.org/10.1002/1097-0126(200012)49:12<1580::AID-PI547>3.0.CO;2-QSearch in Google Scholar
Miller, P., et al., “Correlation of Rheological and Mechanical Properties for Blends of Recycled HDPE and Virgin Polyolefins”. J. Appl. Polym. Sci., 82, 3505–3512(2001), http://dx.doi.org/10.1002/app.2212Search in Google Scholar
Morawiec, J., et al., “Preparation and Properties of Compatibilized LDPE/Organo-modified Montmorillonite Nanocomposites”. Euro. Polym. J., 41, 1115–1122(2005), http://dx.doi.org/10.1016/j.eurpolymj.2004.11.011Search in Google Scholar
Nadanasabapathi, S., et al., “Effect of Starch on Thermal Mechanical, and Barrier Properties of Low Density Polyethylene Film”. J. Appl. Polym. Sci., 99, 3355–3364(2006), http://dx.doi.org/10.1002/app.22358Search in Google Scholar
Olley, R. H., Bassett, D. C., “An Improved Permanganic Etchant for Polyolefines”. Polymer, 23, 1707–1710(1982), http://dx.doi.org/10.1016/0032-3861(82)90110-0Search in Google Scholar
Ross, J. F., MacAdams, J. L.: The Polymeric Materials Encyclopedia – Polyethylene Commercial, CRC Press, New York(1996)Search in Google Scholar
Silvestre, C., et al., “Structure and Morphology Development in Films of mLLDPE/LDPE Blends during Blowing”. Macromol. Mater. Eng., 291, 1477–1485(2006), http://dx.doi.org/10.1002/mame.200600239Search in Google Scholar
Tabatabaei, S. H., et al., “Microporous Membranes Obtained from PP/HDPE Multilayer Films by Stretching”. J. Membr. Sci., 345, 148–159(2009), http://dx.doi.org/10.1016/j.memsci.2009.08.038Search in Google Scholar
Ward, I. M., Sweeney, J.: An Introduction to the Mechanical Properties of Solid PolymersJohn Wiley & Sons Ltd., England(2005)Search in Google Scholar
Wong, C. M.et al., “Effect of Various Polyethylene Structures on Film Extrusion”. J. Reinf. Plast. Compos., 17, 945–954(1998)Search in Google Scholar
Zhang, X. M.et al., “Oriented Structure and Anisotropy Properties of Polymer Blown Films: HDPE, LLDPE and LDPE”. Polymer, 45, 217–229(2004), http://dx.doi.org/10.1016/j.polymer.2003.10.057Search in Google Scholar
© 2012, Carl Hanser Verlag, Munich
Articles in the same Issue
- Contents
- Contents
- Review Papers
- Rheo-chemistry in Reactive Processing of Polyolefin
- Regular Contributed Articles
- Visualization Analysis of a Multilayer Foam Development Process in Microcellular Injection Molding
- Visualization Analysis of Resin Flow Behavior around a Flow Front Using a Rotary Runner Exchange System
- Influence of the Calendering Step on the Adhesion Properties of Coextruded Structures
- The Effect of Silane Treated Hybrid Filler on the Mechanical and Thermal Performance of Carboxylated Nitrile Butadiene Rubber (XNBR) Composites
- Bioplastics from Blends of Cassava and Rice Flours: The Effect of Blend Composition
- A Warpage Optimization Method for Injection Molding Using Artificial Neural Network Combined Weighted Expected Improvement
- Bi-axially Oriented Blown Film Technology
- Stretch-Blow Molding of PET Copolymers – Influence of Molecular Architecture
- Rotational Molding of Polyamide-6 Nanocomposites with Improved Flame Retardancy
- Effect of Blending Protocol on the Rheological Properties and Morphology of HDPE/LLDPE Blend-based Nanocomposites
- High-Strength PET Fibers Produced by Conjugated Melt Spinning and Laser Drawing
- Effect of Blend Ratio of h-LLDPE and LDPE on Tear Properties of Blown Films
- PPS-News
- PPS News
- Seikei Kakou Abstracts
- Seikei-Kakou Abstracts
Articles in the same Issue
- Contents
- Contents
- Review Papers
- Rheo-chemistry in Reactive Processing of Polyolefin
- Regular Contributed Articles
- Visualization Analysis of a Multilayer Foam Development Process in Microcellular Injection Molding
- Visualization Analysis of Resin Flow Behavior around a Flow Front Using a Rotary Runner Exchange System
- Influence of the Calendering Step on the Adhesion Properties of Coextruded Structures
- The Effect of Silane Treated Hybrid Filler on the Mechanical and Thermal Performance of Carboxylated Nitrile Butadiene Rubber (XNBR) Composites
- Bioplastics from Blends of Cassava and Rice Flours: The Effect of Blend Composition
- A Warpage Optimization Method for Injection Molding Using Artificial Neural Network Combined Weighted Expected Improvement
- Bi-axially Oriented Blown Film Technology
- Stretch-Blow Molding of PET Copolymers – Influence of Molecular Architecture
- Rotational Molding of Polyamide-6 Nanocomposites with Improved Flame Retardancy
- Effect of Blending Protocol on the Rheological Properties and Morphology of HDPE/LLDPE Blend-based Nanocomposites
- High-Strength PET Fibers Produced by Conjugated Melt Spinning and Laser Drawing
- Effect of Blend Ratio of h-LLDPE and LDPE on Tear Properties of Blown Films
- PPS-News
- PPS News
- Seikei Kakou Abstracts
- Seikei-Kakou Abstracts