Back
 AJAC  Vol.6 No.4 , March 2015
Structures of LDHs Intercalated with Ammonia and the Thermal Stability for Poly(vinyl chloride)
Abstract: MgAl-NH3 LDHs (layered double hydroxides), ZnAl-LDHs and ZnAl-NH3 LDHs with different molar ratio of Al/ammonia were synthesized by co-precipitation method. The synthetic LDHs samples were characterized by XRD, FT-IR, TGA-DTG and SEM techniques and tested by Congo red method. In addition, after PVC (Poly vinyl chloride) and DOP (Dioctylphthalate) were added to LDHs, the thermal stability for PVC was characterized by TGA-DTG. The results indicated that LDHs intercalated with ammonia improved thermal stability for PVC significantly, MgAl-NH3 LDHs (Mg2+:Al3+: NH3·H2O = 3:1:0.5) and ZnAl-NH3 LDHs (Zn2+:Al3+:NH3·H2O=2:1:1.5) showed the best thermal stability for PVC, interlayered space of LDHs became larger by intercalating ammonia.
Cite this paper: Xue, X. , Zhang, S. and Zhang, H. (2015) Structures of LDHs Intercalated with Ammonia and the Thermal Stability for Poly(vinyl chloride). American Journal of Analytical Chemistry, 6, 334-341. doi: 10.4236/ajac.2015.64032.
References

[1]   Xu, X.P., Chu, W., Wang, N., et al. (2011) Hydrogen Production by Ethanol Steam Reforming on NiCuMgAl Catalysts Derived from Hydrotalcite-Like Precursors. Catalysis Letters, 141, 1228-1236.
http://dx.doi.org/10.1007/s10562-011-0608-0

[2]   Nyambo, C., Chen, D., Su, S.P., et al. (2009) Does Organic Modification of Layered Double Hydroxides Improve the Fire Perform Ance of PMMA. Polymer Degradation and Stability, 94, 1298-1306.
http://dx.doi.org/10.1016/j.polymdegradstab.2009.03.023

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

[4]   Li, K.R., Xiao, Q. and De, B. (2010) Synthesis, Characterization and Catalytic Properties for Acetone Condensation of Mg-Al Hydrotalcite. Molecular Catalysis, 309-314.

[5]   Xu, X.P., Chu, W., Wang, N., et al. (2011) Hydrogen Production by Ethanol Steam Reforming on NiCuMgAl Catalysts Derived from Hydrotalcite-Like Precursors. Catalysis Letters, 141, 1228-1236.
http://dx.doi.org/10.1007/s10562-011-0608-0

[6]   Zhang, Z., Zhang, Y., Su, Q., et al. (2010) Determination of Intermediatesand Mechanism for Soot with NO/O2 on Potassium-Supported Mg-Al Hydrotalcitemixed Oxides by in Situ FTIR. Environmental Science & Technology, 44, 8254-8258.
http://dx.doi.org/10.1021/es102363f

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

[8]   Zeng, H.Y., Wang, J., Feng, Z., You, K.Y., Zhao, C., Sun, J.W. and Liu, P.L. (2010) Synthesis of Propylene Glycol Monomethyl Ether Over Mg/Al Hydrotalcite Catalyst. Catalysis Letters, 137, 94-103.
http://dx.doi.org/10.1007/s10562-010-0335-y

[9]   Kannan, C.S.S. (1992) Synthesis and Physicochemical Characterization of Cobalt Aluminium Hydrotalcite. Journal of Materials Science Letters, 11, 1585-1587.
http://dx.doi.org/10.1007/BF00740840

[10]   Jindra, P. and Kim, F.D. (2005) New Insight into the Formation of Structural Defects in Poly(vinyl chloride). Marcromolecules, 38, 6352-6366.
http://dx.doi.org/10.1021/ma050035p

[11]   Chen, L.Q., Han, B. and Liu, Q. (2011) Synthesis and Characterization of Mg-Al and Mg-Zn-Al Hydrotalcite. Salt Industry, 43, 38-41.

[12]   Roy, S. and Baiker, A. (2009) NOx Storage-Reduction Catalysis: From Mechanism and Materials Properties to Storage-Reduction Performance. Chemical Reviews, 109, 4054-4091.
http://dx.doi.org/10.1021/cr800496f

[13]   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.
http://dx.doi.org/10.1016/S0021-9517(04)00412-9

 
 
Top