Impact modified Nylon 66-Organoclay nanocomposites

Mert, Miray
PA 66 nanocomposites and PA 66 blends were prepared using Cloisite 15A, Cloisite 25A and Cloisite 30B as organoclays and Lotader 2210 (E-BA-MAH), Lotader AX8840 (E-GMA) and Lotader AX8900 (E-MA-GMA) as impact modifiers. The effects of the composition, types of the components and the addition order of the nanocomposites on the morphology, mechanical, flow and thermal properties were investigated. Melt compounding step was carried out twice in a co-rotating twin-screw extruder. This was called as All-S mixing sequence when all the components were melt mixed, simultaneously. The concentration of the elastomer was determined as 5 wt% and the organoclay as 2 wt% to minimize agglomeration of the organoclay and decrease in the mechanical properties. The components which exhibited the best mechanical results and organoclay delamination in All-S mixing sequences were compounded by using different addition orders. Substantial increases were not observed in the tensile, impact, flexural and hardness test results of the nanocomposites compared to the polymer matrix that was twice extruded. Addition order of the components affected the properties of the nanocomposites and dispersion of the elastomeric domains and the organoclay. The best mechanical test results were obtained for All-S mixing sequence of (PA 66-15A-2210). The degree of organoclay dispersion is better in Cloisite 15A and Cloisite 25A containing nanocomposites than the ones which have Cloisite 30B. Low melt flow index values aided dispersion of the organoclay whereas the slight changes in the crystallinity did not significantly contribute to the changes in the mechanical properties of the nanocomposites or the blends.


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The effects of melt state compounding and addition order of ethylene-butyl acrylate-maleic anhydride (E-BA-MAH), ethylene-glycidyl methacrylate (E-GMA), ethylene-methyl acrylate-glycidyl methacrylate (E-MA-GMA) terpolymer and/or three types of organoclays (Cloisite® 15A, 25A and 30B) on morphology, thermal, mechanical and dynamic mechanical properties of polyamide-6 are investigated. XRD patterns show that the interlayer spacing for Cloisite® 15A remained unchanged; however it increased for the organoclays ...
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Alyamaç, Elif; Yılmazer, Ülkü; Department of Chemistry (2004)
This study was conducted to investigate the effects of component concentrations and addition order of the components, on the final properties of ternary nanocomposites composed of poly(ethylene terephthalate), organoclay, and an ethylene/methyl acrylate/glycidyl methacrylate (E-MA-GMA) terpolymer acting as an impact modifier for PET. In this context, first, the optimum amount of the impact modifier was determined by melt compounding binary PET-terpolymer blends in a corotating twin-screw extruder. The amoun...
Synthesis and characterization of conducting copolymers of thiophene ended poly(ethyleneoxide) : their electrochromic properties and use in enzyme immobilization
Yıldız, Hüseyin Bekir; Toppare, Levent Kamil; Department of Chemistry (2007)
Thiophene ended poly(ethylene oxide) (ThPEO) and random copolymer (RPEO) of 3-methylthienyl methacrylate and p-vinylbenzyloxy poly (ethyleneoxide) units were synthesized chemically. Further graft copolymerization of RPEO and ThPEO with pyrrole (Py) and thiophene (Th) were achieved in H2O - sodium dodecylsulfate (SDS), H2O - p-toluenesulphonic acid (PTSA) and acetonitrile (AN) - tetrabutylammonium tetrafluoroborate (TBAFB) solvent electrolyte couples via constant potential electrolyses. Characterizations wer...
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Gündüz, Hüseyin Özgür; Kaynak, Cevdet; Department of Polymer Science and Technology (2009)
In the first part of this dissertation, glass fiber reinforced/unreinforced polyamide 6 (PA6) and polyamide 66 (PA66) were compounded with three different flame retardants, which were melamine cyanurate, red phosphorus and brominated epoxy with antimony trioxide, by using an industrial scale twin screw extruder. Then, to investigate flame retardancy of these specimens, UL-94, Limiting Oxygen Index (LOI) and Mass Loss Cone Calorimeter (MLC) tests were carried out. In addition to flammability tests, thermogra...
Spray coatable electrochromic dioxythiophene polymers with high coloration efficiencies
REEVES, Benjamin D.; GRENIER, Christophe R.G.; ARGUN, Avni A.; Çırpan, Ali; MCCARLEY, Tracy D.; REYNOLDS, John R. (2004-10-05)
Four new disubstituted propylenedioxythiophene polymers have been synthesized by Grignard metathesis on the 1-5 g scale. All polymers were found to be soluble in chloroform, methylene chloride, toluene, and tetrahydrofuran and were fully structurally characterized having GPC determined number-average molecular weights ranging from 33000 to 47000 g mol(-1). Dilute polymer solutions in toluene exhibited strong red fluorescence with moderate quantum efficiencies from 0.38 to 0.50. Homogeneous thin films were f...
Citation Formats
M. Mert, “Impact modified Nylon 66-Organoclay nanocomposites,” M.S. - Master of Science, Middle East Technical University, 2007.