机构地区: 上海交通大学化学化工学院
出 处: 《高等学校化学学报》 2003年第10期1907-1910,共4页
摘 要: 在聚合物熔体插层蒙脱土 ( MMT)过程中 ,流场的作用使得蒙脱土晶粒表面的片层在超过临界值时发生弯曲 ,与内核之间形成一楔状 ,并进一步发生断裂 ,形成剥离结构 .结果表明 ,合适的流场强度是得到适当大小的片状粒子的关键 . There is a critical value(velocity gradient X viscosity) at which the shear-induced plane compresion causes the slices of montmorillonite(MMT) to buckle and produces a cuneate space between the outside slice and the crystallite during the melt intercalation. The outest slice can be broken when it bends exceed the minimal curvature radius and yields exfoliation further. The appropriate intensity of flow is the key point of getting suitable slice configuration in the nano-composition process.