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Mechanical and Barrier Properties of LLDPE-LDPE Blend Film with Micro Clay

S. Soundararajan, S. K. Nayak

Abstract


The present study    LLDPE-LDPE(50-50 wt%)  were compounded with added microclay filler using silicone oil as dispersing agent by twin screw compounding. The three  formulations were  taken as 1%, 3%, 5% of  microclay. The extruded standard has been cut into pellets by cutter. Then  films were made using blown film extrusion and then tested.   

As the filler content increases, the flow behaviour of the film increases. Tensile strength  increases upto 1%  because of the  reinforcing effect, after that it decreases in both machine direction and transverse direction.  The Elongation at break increases upto 1% microclay after that it decreases for  3% and 5% microclay filled LLDPE-LDPE blends in machine direction. The Eb increases for all formulations in  transverse direction.  M/D  Tear strength is higher than LLDPE-LDPE blend for all formulation because of the  reinforcement effect. Similarly the tear strength  in Transverse  direction  is also  higher  up to 5%.  As microclay concentration is high, Burst strength is high. Burst strength is higher for 5% microclay formulation.  As microclay concentration  increases, drop impact strength increases upto 5%. As concentration of microclay  increases  the  OTR    and  WVTR  decreases. 

Key words: LLDPE, LDPE, Microclay, Twin screw compounding, Blown film extrusion, Mechanical and Barrier Properties tesing.


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References


Brydson JA. Polymer Materials. 7th edition. Elsevier; 2005.

John Briston. Advanced in Plastics Packaging Technology. Pira International; 1992.

Rasika Tankhiwale, SK Bajpai. Preparation, characterization and antibacterial applications of ZnO-nanoparticles coated polyethylene films for food packaging. Colloids and Surfaces B: Biointerfaces. 2012; 90 (1 February): 16–20, https://doi.org/10.1016/j.colsurfb.2011.09.031

Yage Xing, Xihong Li, Li Zhang, Qinglian Xu, Zhenming Che, Weili Li ,Yumin Bai, Ke Li. Effect of TiO2 nanoparticles on the antibacterial and physical properties of polyethylene-based Film. Progress in Organic Coatings. 2012; 73 (2–3): 219–224. https://doi.org/10.1016/j.porgcoat.2011.11.005

Poonsub Threepopnatkul, ChanikarnWongnarat, Wirawan Intolo, Sunantha Suato, Chanin Kulsetthanchalee. Effect of TiO2 and ZnO on thin film properties of PET/PBS blend for food packaging applications. Energy Procedia. 2014; 56: 102–111. https://doi.org/10.1016/j.egypro.2014.07.137

mparo Llorens, Elsa Lloret, Pierre A Picouet, Raul Trbojeich, Avelina Fernandez. Review, Metallic-based micro and nanocomposites in food contact materials and active food packaging. Trends in Food Science & Technology. 2012; 24(1): 19– 29. https://doi.org/10.1016/j.tifs.2011.10.001

Kontov E, Niaounakis M. Thermo mechanical properties of LLDPE/SiO2 nano composites. Polymer. 2006; 47(4): 1267–1280.

Riko Uotila, Ulla Hippi, Santeri Paavola, Jukka Seppala. Compatibilization of PP/elastomer/microsilica composites with funtionalized poly olefins: effect on microstructure and mechanical properties. Polymer. 2005; 46(19): 7923–7930.

Dorigato A, Pegoretti A, Penati A. Linear low-density poly ethylene/silica micro- and nano composites: dynamic rheological measurements and modelling. Express Polymer Letters. 2010: 4(2): 115–129.

Supri AG, Salmah H, Hazwan K. Low density polyethylene-nanoclay composites: the effect of poly(Acrylic Acid) on mechanical properties, XRD, morphology, properties, and water absorption. Malaysian Polymer Journal (MPJ). 2008; 3(2): 30–53.

Ruijun Gu, Mohini M Sain. Effect of wood fiber and micro clay on the performance of soy based polyureathane foams. J. Polymers and Environment. 2013; 21(1): 39–53.

Li Xie, Xia-Yan Lv, Zhong-Jie Han, Ji-Hao Ci, Chang-Qing Fang, Peng-Gang Ren. Preparation and performance of high-barrier low density polyethylene/organic montmorrionite nanocomposites. Polymer-Plastics Technology and Engineering. 2012; 51(12): 1251–1257.

Susan Dadbin, Mohsen Noferesti, Masoud Frounchi. Oxygen barrier LDPE/LLDPE/organo nanocomposites films for food packaging. Macromolecular Symposia. Polymer Science and Technology. 2008; 274(1): 22–27.

Srinivastava D, Garg R, Kumar P, Axena DC, Mathur GN. Optimization studies of blend composition and ageing parameters for making LDPE/HDPE/LLDPE films by response surface methodology. Macromolecular Materials. 2000; 283(11): 81–87.

Lu JJ, Sue HJ. Morphology and mechanical properties of blown films of a low-density polyethylene/linear low-density polyethylene blend. Journal of Polymer Science Part B: Polymer Physics. 2002; 40(6): 507–518.

Mic P, Bhattacharya SN, Field G. Transient elongational viscosity of

LLDPE/LDPE blends and relevance to bubble stability in the film blowing process. Polymer Engineering and Science. 1998; 38(10): 1685–1693.

Micic P, Bhattacharya SN. Rheology of LLDPE, LDPE and LLDPE/LDPE blends, and its relevance to the film blowing process. Polymer International. 2000; 49(12): 1580–1589.

Yilmazer U. Effects of the processing conditions and blending with linear low- density polyethylene on the properties on low-density polyethylene films. Journal of Applied Polymer Science. 1991; 42(9): 2379–2384.

Zhang XM, Elkoun S, Ajji A. Effect of crystalline structure on tear resistance of LDPE and LLDPE-blown films. Journal of Plastic Film and Sheeting. 2004; 20(1): 43–53.


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