TITLE:
Structures of LDHs Intercalated with Ammonia and the Thermal Stability for Poly(vinyl chloride)
AUTHORS:
Xiaoyu Xue, Shuhua Zhang, Hongmei Zhang
KEYWORDS:
Ammonia, Layered Double Hydroxide, Poly(vinyl chloride), Thermal Stability
JOURNAL NAME:
American Journal of Analytical Chemistry,
Vol.6 No.4,
March
17,
2015
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.