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144. Effects of Copper-Containing Layered Double Hydroxide on Thermal and Smoke Behavior of Poly(vinyl chloride).
作者:Hong Zhu, Winson Wang, Tianxi Liu*
關(guān)鍵字:poly(vinyl chloride), layered double hydroxides, degradation, thermal properties, smoke density
論文來源:期刊
具體來源:J. Appl. Polym. Sci., 2011, 122(1), 273-281.
發(fā)表時間:2011年

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.

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