Structure and Properties of Nanocomposites Based on Nylon-11 and -12 Compared with Those Based on Nylon-6

By T. D. Fornes, D. R. Paul. 2004

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An in-depth analysis was made on the effect of polyamide repeat structure on the morphology and mechanical properties of nanocomposites based on nylon-6, nylon-11, and nylon-12. Special care was taken to make comparisons under fixed thermal and rheological conditions. Increasing the aliphatic content relative to nylon-6 results in a decrease in the extent of organoclay exfoliation as revealed by transmission electron photomicrographs. The extent of platelet separation as judged by low-angle X-ray scattering is more complicated for nylon-11 and -12 nanocomposites than those based on nylon-6 due the presence of crystalline peaks associated with the polyamide matrix. An “exfoliation index” is used to compare stiffness effects observed in the different nanocomposites due to the large difference in the modulus of nylon-6 as compared to nylon-11 and -12. Interestingly, the exfoliation efficiency parallels morphological trends in that nylon-6 exhibits higher efficiencies than the more aliphatic nylon-11 and -12 ...

Subfields: Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/7ef499ef7b33e185e4a1ae1c9410a8f617d50185