02188nam a2200217Ia 4500003001000000005001700010040000900027245008600036490003900122520148100161650001201642650001901654650002001673700001701693700001501710700001701725700001601742700001501758856015601773008004101929MX-MdCICY20260521091032.0  cCICY10aEffect of organoclay structure on nylon 6 nanocomposite morphology and properties0 vPolymer, 43(22), p.5915-5933, 20023 aA carefully selected series of organic amine salts were ion exchanged with sodium montmorillonite to form organoclays varying in amine structure or exchange level relative to the clay. Each organoclay was melt-mixed with a high molecular grade of nylon 6 (HMW)using a twin screw extruder; some organoclays were also mixed with a low molecular grade of nylon 6 (LMW). Wide angle X-ray scattering, transmission electron microscopy, and stress-strain behavior were used to evaluate the effect of amine structure on nanocomposite morphology and physical properties. Three surfactant structural issues were found to significantly affect nanocomposite morphology and properties in the case of the HMW nylon 6: decreasing the number of long alkyl tails from two to one tallows, use of methyl rather than hydroxy-ethyl groups, and use of an equivalent amount of surfactant with the montmorillonite, as opposed to adding excess, lead to greater extents of silicate platelet exfoliation, increased moduli, higher yield strengths, and lower elongation at break. LMW nanocomposites exhibited similar surfactant structure-nanocomposite behavior. Overall, nanocomposites based on HMW nylon 6 exhibited higher extents of platelet exfoliation and better mechanical properties than nanocomposites formed from the LMW polyamide, regardless of the organoclay used. This trend is attributed to the higher melt viscosity and consequently the higher shear stresses generated during melt processing.14aNYLON 614aNANOCOMPOSITES14aMELT PROCESSING12aFornes, T.D.12aYoon, P.J.12aHunter, D.L.12aKeskkul, H.12aPaul, D.R.40uhttps://drive.google.com/file/d/16CZnmarKXVdGLGRDy9NhP4EEa076aD5q/view?usp=drivesdkzPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx250602s9999    xx |||||s2   |||| ||und|d