AMPC  Vol.4 No.12 , December 2014
Preparation of MgAl LDHs Intercalated with Amines and Effect on Thermal Behavior for Poly(vinyl chloride)
MgAl LDHs intercalated with CO(NH2)2, NH4Cl and NH3·H2O were prepared by co-precipitation and XRD, FT-IR, TGA-DTA and SEM techniques were employed for characterization. The results indicated that the layer-layer spacing of LDHs was enlarged by 0.169, 0.285 and 0.227 Å with the intercalation of CO(NH2)2, NH+4 and NH3, separately. The effects on thermal stability and degradation behavior of synthesized LDHs where mole ratios of Mg/Al/urea = 3:1:1, Mg/Al/NH4Cl = 3:1:1.5 and Mg/Al/NH3·H2O = 3:1:0.5 were investigated by Congo Red Method and thermogravimetric analysis (TGA) from 25°C - 800°C under N2. The TGA and DTA results showed, by incorporating 5% MgAl-CO(NH2)2 LDH, the dehydrochlorination temperature of PVC composites is 12°C higher than MgAl-NH+4 and MgAl-NH3 LDHs. MgAl-NH3 LDH enhances the ending temperature of the first degradation stage of PVC composites by 8°C compared with MgAl LDH. The LDH intercalated with CO(NH2)2 is proved to be an effective thermal stabilizer for PVC processing.

Cite this paper
Xue, X. , Zhang, H. and Zhang, S. (2014) Preparation of MgAl LDHs Intercalated with Amines and Effect on Thermal Behavior for Poly(vinyl chloride). Advances in Materials Physics and Chemistry, 4, 258-266. doi: 10.4236/ampc.2014.412028.
[1]   Zhu, H., Wang, W.S. and Liu, T.X. (2011) Effects of Copper-Containing Layered Double Hydrotalcite on Thermal and Smoke Behavior of Poly(vinyl chloride). Journal of Applied Polymer Science, 122, 273-281.

[2]   Dietrich, B. (2002) Design of Anion Receptors: Applications. Pure and Applied Chemistry, 85, l457-1464.

[3]   Cavani, F., Trifiro, F. and Vaccari, A. (1991) Hydrotalcite-Type Anionic Clays Preparation, Properties and Applications. Catalysis Today, 11, 173-301.

[4]   Niu, X.N., Zhao, Y. and Zhu, H.T. (2010) Mg-Al-Fe Hydrotalcite Its Calcined Product Research on Reactive Red X-3B Decolorization Performance. Water Treatment Technology, 36, 35-40.

[5]   Goh, K.-H., Lim, T.-T. and Dung, Z.L. (2008) Application of Layered Double Hydroxidesfor Removal of Oxyanions: A Review. Water Research, 42, 1343-1368.

[6]   Li, K.R., Gu, X.Q., Hao, D.B., et al. (2010) Synthesis, Characterization and Catalytic Acetone Hydrotalcite Condensation Performance. Molecular Catalysis, 4, 309-314.

[7]   Wu, N. (2010) Hydrotalcite Compound Applications in Catalysis Field. Industrial Catalysis, 18, 28-31.

[8]   Liu, J., Chen, G.M. and Yang, J.P. (2008) Preparation and Characterization of Poly(vinyl chloride)/Layered Double Hydroxide Nano-Composites with Enhanced Thermal Stability. Polymer, 49, 3923-3927.

[9]   Lin, Y.J., Wang, J.R., Evans, D.G., et al. (2006) Layered and Intercalated Hydrotalcite-Like Materials as Thermal Stabilizers in PVC Resin. Journal of Physics and Chemistry of Solids, 67, 998-1001.

[10]   Yan, H.B., Li, M., Liu, Q.F., et al. (2009) Hydrotalcite/Ca-Zn Composite Heat Stabilizer for PVC Heat Stability. Polymer Materials Science and Engineering, 25, 75-77.

[11]   Nyambo, C., Chen, D., Su, S.P. and Wilkie, C.A. (2009) Does Organic Modification of Layered Double Hydroxides Improve the Fire Performance of PMMA. Polymer Degradation and Stability, 94, 1298-1306.

[12]   Yang, Z.H., Chi, W.W., et al. (2008) Synthesis and Application of Mg-Al-Ca Ternary Hydrotalcite in PVC. Plastics Additives, 2008, 18-21.

[13]   Li, L., Mo, D. and Luo, Q.S. (2004) Reconstruction and Characterization of Zn, Al Hydrotalcite Like Compound. Chinese Journal of Inorganic Chemistry, 20, 256-260.

[14]   Abdel-Naby, A.S., Al-Ghamdi, R.F. and Al-Ghamdi, A.A. (2010) Effect of Cyanoguanidine-Metal and Urea-Metal Complexes on the Thermal Degradation of Poly(vinyl chloride). Journal of Vinyl and Additive Technology, 16, 15-22.

[15]   Xu, X.P., Chen, S., Tang, W., Qu, Y.J. and Wang, X. (2013) Synthesis and Application of Uracil Derivatives as Novel Thermal Stabilizers for Rigid Poly(vinyl chloride). Polymer Degradation and Stability, 98, 659-665.

[16]   Wang, G.L., Yang, M., Li, Z.W., Lin, K.F., Jin, Q., Xing, C.J., Hu, Z.D. and Wang, D. (2013) Synthesis and Characterization of Zn-Doped MgAl-Layered Double Hydroxide Nanoparticles as PVC Heat Stabilizer. Journal of Nanoparticle Research, 15, 1882-1890.

[17]   Lin, Y.J., Li, D.Q., Evans, D.G. and Duan, X. (2005) Modulating Effect of Mg-Al-CO3 Layered Double Hydroxides on the Thermal Stability of PVC Resin. Polymer Degradation and Stability, 88, 286-293.

[18]   Lin, Y.J., Wang, J.R., Evans, D.G. and Li, D.Q. (2006) Layered and Intercalated Hydrotalcite-Like Materials as Thermal Stabilizers in PVC Resin. Journal of Physics and Chemistry of Solids, 67, 998-1001.

[19]   Ren, L.L., He, J. and Duan, X. (2001) Intercalation Assembled Anionic Pillared Materials. Chemical Bulletin, 64, 686-691.

[20]   Costantino, U., Marmottini, F., Nocchetti, M. and Vivani, R. (1998) New Synthetic Routes to Hydrotalcite-Like Compounds—Characterization and Properties of the Obtained Materials. European Journal of Inorganic Chemistry, 10, 1439-1446.<1439::AID-EJIC1439>3.0.CO;2-1

[21]   Kannan, S. and Swamy, C.S. (1992) Synthesis and Physicochemical Characterization of Cobalt Aluminum Hydrotalcite. Journal of Materials Science Letters, 11, 1585-1587.

[22]   Xie, X.M., Yan, K., Hu, Q.X., Song, J.L. and Wang, Z.Z. (2008) Preparation and Catalytic Application of Copper-Containing Hydrotalcite-Like Compounds. Chinese Journal of Inorganic Chemistry, 24, 32-36.

[23]   Purmova, J., Pauwels, K.F.D., van Zoelen, W., Vorenkamp, E.J. and Schouten, A.J. (2005) New Insight into the Formation of Structural Defects in Poly(vinyl chloride). Macromolecules, 38, 6352-6366.

[24]   Yurco, M., Bagnasco, G., Costantino, U., Marmottini, F., Montanari, T., Ramis, G. and Busca, G. (2004) Production of Hydrogen from Oxidative Steam Reforming of Methanol: I. Preparation and Characterization of Cu/ZnO/Al2O3 Catalysts from a Hydrotalcite-Like LDH Precursor. Journal of Catalysis, 228, 43-55.