Mechanical Properties and Flame Retardancy Research of Montmorillonite Intercalate Polyamide 66 Composites

A series of exfoliated nanocomposites or microcomposites have been fabricated with different organophilic montmorillonite (OMMT) loading via in situ intercalation polymerization and melt intercalation. Their structure and mechanical properties were investigated and compared with XRD and other advanced facilities systematically. Flame retardancy was evaluated by conventional limiting oxygen index (LOI) and char residue ratio. Experiment results shows that fabricated technology have unobvious influence on micro-structure, tensile strength and tensile modulus of PA66/OMMT composites. On the contrary, the alteration of OMMT loading cause dramatic change on both mechanical performance and flame retardancy. The maximum tensile strength of PA66/OMMT composites is 106 MPa with 3 wt% OMMT loading. The addition of OMMT enhances obviously the mechanical property and flame retardancy of PA66.