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Abstract

Silane-crosslinked polyethylene/magnesium hydroxide/organomontmorillonite nanocomposite is prepared from linear low density polyethylene (LLDPE), vinyltrimethoxysilane, magnesium hydroxide (MH), and organo-montmorillonite (OMT). The morphology is characterized by the X-ray diffraction and high resolution electron microscopy. It is indicated that the intercalated morphology is formed in the polymer matrix. The mechanical properties, thermal stability, flammability, and crystallization are investigated by tensile, limiting oxygen index, cone calorimetry, thermogravimetry, and differential scanning calorimetry experiments. Results indicate that the crosslinked nanocomposite shows lower thermal-oxidative stability and fire safety than the crosslinked LLDPE/MH composite at the same additive level, the reason is postulated to be that the presence of MH and OMT decreases the crosslinking degree and the crosslinking network structure prevents the migration of OMT layers to the surface.

Keywords

polyethylene crosslinking magnesium hydroxide montmorillonite.

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References

Shieh, Y.T. and Liu, C.M. (1999). Silane Crafting Reactions of LDPE, HDPE, and LLDPE , J. Appl. Polym. Sci., 74: 3404-3411.

Scott, H.G. (1972). U.S. Patent 3,646,155.

Sengupta, S.S. and Parent, J.S. (2006). Comparative Analysis of Radical-mediated Polyethylene Modifications: Vinyltriethoxysilane Versus Mercaptopropyltriethoxysilane Addition, Polym. Engi. Sci. , 46: 480-485.

Zhang, G.Q. , Wang, G.L. , Zhang, J. , Wei, P. and Jiang, P.K. (2006). Performance Evaluation of Silane Crosslinking of Metallocene-based Polyethylene-octene Elastomer, Appl. Polym. Sci., 102: 5057-5061.

Bhatt, C.U. , Royer, J.R. , Hwang, C.R. and Khan, S.A. (1999). Compressive Stress Relaxation of Metallocene-based Polyolefin Foams: Effect of Gamma-ray-induced Crosslinking, J. Polym. Sci. Part B: Polym. Phys., 37: 1045-1056.

Wong, B. and Baker, W.E. (1997). Melt Rheology of Graft Modified Polypropylene , Polymer, 38: 2781-2789.

Sultan, B.A. and Palmlof, M. (1994). Advance in Cross-linking Technology, Plast. Rub. Comp. Proc. Appl., 21: 65-73.

Fiaz, M. and Gilbert, M. (1998). Silane Crosslinking of Plasticized Poly(vinyl chloride), Adv. Polym. Technol., 17: 37-51.

Matsuda, Y. (1999). Preparation of Flame-Retardant Silane-Crosslinked Polyolefin. JP11181188.

10.

Wang, Z.Z. , Hu, Y. , Gui, Z. and Zong, R.W. (2003). Halogen-free Flame Retardation and Silane Crosslinking of Polyethylenes, Polym. Test, 22: 533-538.

11.

Marushige, T. and Yagi, K. (2000). Flame-Retardant, Silane-Crosslinked Polyolefin Resin Composition. JP2000327864.

12.

Leswzynska, A. , Njuguna, J. , Pielichowski, K. and Banerjee, J.R. (2007). Polymer/Montmorillonite Nanocomposites with Improved Thermal Properties. Part II. Thermal Stability of Montmorillonite Nanocomposites based on Different Polymeric Matrixes, Thermo . Acta, 454: 1-22.

13.

Laoutid, F. , Gaudon, P. , Taulemesse, J.M. et al. (2006). Study of Hydromagnesite and Magnesium Hydroxide based Fire Retardant Systems for Ethylene-vinyl Acetate containing or Gano-modified Montmorillonite, Polym. Degrad. Stab., 91: 3074-3082.

14.

Tang, Y. , Hu, Y. , Li, B.G. et al. (2004). Polypropylene/Montmorillonite Nanocomposites and Intumescent, Flame-retardant Montmorillonite Synergism in Polypropylene Nanocomposites, J. Poly. Sci. Part A-Poly. Chem., 42: 6163-6173.

15.

Lu, H.D. , Hu, Y. , Yang, L. , Wang, Z.Z. , Chen, Z.Y. and Fan, W.C. (2005). Preparation and Thermal Characteristics of Silane-grafted Polyethylene/ Montmorillonite Nanocomposites , J. Mater. Sci., 40: 43-46.

16.

Beyer, G. (2001). Flame Retardant Properties of EVA-nanocomposites and Improvements by Combination of Nanofillers with Aluminium Trihydrate, Fire and Mater., 25: 193-197.

17.

Lu, H.D. , Hu, Y. , Xiao, J.F. , Wang, Z.Z. , Chen, Z.Y. and Fan, W.C. (2006). Magnesium Hydroxide Sulfate Hydrate Whisker Flame Retardant Polyethylene/Montmorillonite Nanocomposites , J. Mater. Sci., 41: 363-367.

18.

Ravadits, I. , Toth, A. , Marosi, G. , Marton, A. and Szep, A. (2001). Organosilicon Surface Layer on Polyolefins to Achieve Improved Flame Retardancy through an Oxygen Barrier Effect, Polym. Degrad. Stab., 74: 419-422.

19.

Zanetti, M. , Camino, G. , Reichert, P. and Mulhaupt, R. (2001). Thermal Behaviour of Poly(propylene) Layered Silicate Nanocomposites, Macromol. Rapid. Commun., 22: 176-180.

20.

Lu, H.D. , Hu, Y. , Kong, Q.H. , Cai, Y.B. , Chen, Z.Y. and Fan, W.C. (2005). Influence of Gamma Irradiation on High Density Polyethylene/Ethylenevinyl Acetate/Clay Nanocomposites, Polym. Adv. Technol., 15: 601-605.

Study on Preparation and Properties of Silane-crosslinked Polyethylene/ Magnesium Hydroxide/ Montmorillonite Nanocomposites

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