PVC复合稀土改性剂的合成与检测

he content introduce a method of Compound Rare Earth Modifier using acrylic acid(AA)/ lanthanum oxide/ butyl acrylate(BA) and methyl methacrylate(MMA).At the same time the infrared spectroscopic analysis is used to detect the modifier,then analysis by titration test the content of lanthanum acrylic acid;at last Congo red experiment and Harker rheometer to test the dynamic/static heat stability,test impact resistance by impact test enginery.The result showed that Four-dammarane can be synthesized compound PVC modifier,which can improve PVC heat stability and impact resistance,besides the effectiveness of heat stability can reach or exceed the effectiveness of lead salt,but its impact resistance is not so better as ACR and PVE.Also at the critical point,the sample with compound modifier is easy to discolour, which with lead salt can protect the color better.