二苯基甲烷二异氰酸酯改性凹凸棒石的合成与表征

Preparation and characterization of 4,4′-diphenylmethane diisocyanate modified attapulgite

为改善凹凸棒石(ATTP)和聚合物之间的相容性,以二苯基甲烷二异氰酸酯(MDI)为改性剂,利用MDI含有的异氰酸酯基与ATTP表面的羟基反应制备了MDI改性ATTP。测定结果表明反应程度达到74.15%;表征结果证实MDI接枝到了凹凸棒石表面,ATTP的结构未发生改变,MDI/ATTP分散性能良好。

To ensure good compatibility between polymer and inorganic phase （silicate）, 4,4＇-diphenylmethane diisocyanate modified attapulgite（MDI/ATTP） is prepared through the reaction between --NCO in MDI and --OH on ATTP surface. The reaction degree is evaluated and the degree can reach 74. 15%. The structure of MDI/ATTP is characterized and the results indicate that after the MDI reacted with the layers of ATTP the fiber structure of AATP is not changed.