The Surface Modification Research on Hydrocalumite
Hydrocalumite is a kind of hydrotalcite-like heat stabilizer,the special lamellar structure and interlayer material of which determines that it has thermal stability for PVC.The hydrocalumite synthesized by normal way can't have a perfect crystal form,leading to bad dispersibility in PVC.In this research,sodium stearate,silicane as well as aluminic acid ester were respectively used to modify the surface of hydrocalumite,what's more,the static oven heat aging experiments were used to compare thermal stability for PVC which used hydrocalunite before and after these modifications as stabilizer.As a result,the hydrocalumite which after being modified shows better thermal stability.
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