摘要
用熔融法制备了聚苯乙烯／蒙脱土插层复合材料，用Ｘ射线衍射、ＤＳＣ等手段研究了复合材料的结构与性能．聚苯乙烯熔体不能插层于钠基蒙脱土中，但能插层于经有机化合物处理过的蒙脱土中．
Polystyrene/montmorillonite nanocomposites were prepared by melt intercalation.Their structure and properties were studied with X ray diffraction and differential scanning calorimetry.X ray diffraction results proved that polystyrene melt could not be intercalated in original Na+ montmorillonite,but could be intercalated in organically modified montmorillonite.The gallery distance of organo montmorillonite increased from 2.16nm to 3.25nm after intercalation of polystyrene chains.The presence of the alkylammonium cations in the galleries of organo montmorillonite rendered the hydrophilic montmorillonite organophilic.The role of alkylammonium cations was to lower the surface energy of the inorganic montmorillonite and improve the wetting characteristics with polystyrene.The glass transition temperatures of polystyrene/organo montmorillonite composites for various heating time were all 1～2° higher than that of bulk polystyrene.Also the enthalph changes at glass transition of polystyrene/organo montmorillonite were larger than that of bulk polystyrene.The results indicated that polystyrene/organo montmorillonite hybrid formation required no additional processing time than currently required by conventional polymer processing techniques.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
1998年第2期129-133,共5页
Acta Polymerica Sinica
基金
国家自然科学基金
关键词
聚苯乙烯
蒙脱土
纳米复合材料
插层复合
Montmorillonite,Polystyrene,Composite,Structure and properties
