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Effects of copper‐containing layered double hydroxide on thermal and smoke behavior of poly(vinyl chloride)
Author(s) -
Zhu Hong,
Wang Winson,
Liu Tianxi
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.34027
Subject(s) - thermogravimetric analysis , thermal stability , vinyl chloride , hydroxide , materials science , layered double hydroxides , intumescent , polymer chemistry , fire retardant , char , hydrolysis , composite material , nuclear chemistry , chemical engineering , chemistry , pyrolysis , inorganic chemistry , organic chemistry , engineering , copolymer , polymer
Thermal and smoke properties of poly(vinyl chloride)/copper‐containing layered double hydroxide (MgCuAl‐LDH) composites were studied in this article. Highly crystallized LDH with platelet size at micrometer scale was prepared via urea hydrolysis and further intercalated with a variety of anions. X‐ray diffraction results indicated an enlargement of basal spacing to 2.54 nm for dodecylsulfonate‐intercalated LDH. The effects of LDHs on thermal stability and degradation behavior of PVC were investigated by Congo Red tests and thermogravimetric analysis (TGA). By incorporating 3 wt % LDHs, the thermal stability times of carbonated MgAl‐LDH and MgCuAl‐LDH/PVC composites were even three and five times of that of neat PVC. The TGA showed an increase of polyene sequences and char residues formed during PVC pyrolysis. MgCuAl‐LDH/PVC composites gave the best reduction in maximum density of smoke, i.e., 25% lower than that of MgAl‐LDH/PVC composites. However, the organomodification of LDH by anion exchange gave no contribution to improvement of thermal stability of PVC. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011