Mechanical properties, flammability and char morphology of epoxy resin/montmorillonite nanocomposites
Source abstract
Abstract
Abstract Epoxy resin/montmorillonite nanocomposites were obtained via in-situ intercalative polymerization. Na-montmorillonites modified with octadecyl, hexadecyl and dodecyl trimethylammonium, benzyl triethylammonium and tetramethylammonium ions were used in diglycidyl ether of bisphenol-A epoxy resin. Montmorillonites modified with long alkyl ammonium ions yielded intercalated nanocomposites whereas those with benzyl or very short alkyl ammonium ions gave phase separated microcomposites. Significant improvements in flexural strength and stiffness were obtained, especially at a low clay mineral level of 0.5 mass% with octadecyl trimethylammonium ions. Fracture toughness values double that of neat epoxy resin could be reached together with improved stiffness and strength by nanocomposite formation. The largest improvement in fracture toughness was also obtained by octadecyl trimethylammonium montmorillonite. Regarding flexural strength and fracture toughness, optimum clay mineral levels were assessed as 0.5 mass% for intercalated nanocomposites. Flammability was evaluated by oxygen index measurements with varying clay mineral level and surface modification. Largest improvement, i.e. from 20.9% to 23.2%, was attained with 2 mass% dodecyl trimethylammonium montmorillonite containing epoxy resin. Basal spacings in char residues of oxygen index tests were around 1.3 nm, irrespective of the montmorillonite content, type of modification and oxygen index performance.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Polymer Nanocomposites and Properties · Silicone and Siloxane Chemistry · Synthesis and properties of polymers
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (48)
Show source-provided references
1. Layered silicate polymer nanocomposites: new approach or illusion for fire retardancy? Investigations of the potentials and the tasks using a model system10.1002/pat.483 ↗
2. Morphology, thermal relaxations and mechanical properties of layered silicate nanocomposites based upon high-functionality epoxy resins10.1016/S0032-3861(02)00269-0 ↗
3. Processing of mica/epoxy nanocomposites by ultrasound mixing10.1002/app.26292 ↗
4. Thermoset-layered silicate nanocomposites. Quaternary ammonium montmorillonite with primary diamine cured epoxies10.1021/cm000477+ ↗
5. Synthetic clay minerals and purification of natural clays
6. Preparation of clay/epoxy nanocomposites by layered-double-hydroxide initiated self-polymerization10.1016/j.polymer.2008.08.062 ↗
7. Preparation, characterization, and nanostructural evolution of epoxy nanocomposites10.1002/app.12901 ↗
8. Processing and morphological development of montmorillonite epoxy nanocomposites10.1088/0957-4484/14/6/315 ↗
9. Fully exfoliated layered silicate epoxy nanocomposites10.1002/polb.20259 ↗
10. Nylon 6 nanocomposites by melt compounding10.1016/S0032-3861(00)00380-3 ↗
11. The effect of organoclay on the mechanical properties and morphology of injection-molded polyamide 6/polypropylene nanocomposites10.1002/app.13244 ↗
12. Thermal degradation of ethylene–vinyl acetate copolymer nanocomposites10.1016/j.polymer.2005.05.084 ↗
13. The thermal degradation of poly(methyl methacrylate) nanocomposites with montmorillonite, layered double hydroxides and carbon nanotubes10.1002/pat.697 ↗
14. The influence of carbon nanotubes, organically modified montmorillonites and layered double hydroxides on the thermal degradation and fire retardancy of polyethylene, ethylene–vinyl acetate copolymer and polystyrene10.1016/j.polymer.2007.08.059 ↗
15. Comparative studies for the effect of intercalating agent on the physical properties of epoxy resin–clay based nanocomposite materials10.1016/j.eurpolymj.2008.06.015 ↗
16. Elastic constants for an intercalated layered-silicate/polymer nanocomposite using the effective particle concept — a parametric study using numerical and analytical continuum approaches10.1016/j.commatsci.2008.09.005 ↗
17. Modeling properties of nylon 6/clay nanocomposites using composite theories10.1016/S0032-3861(03)00471-3 ↗
18. Effect of organoclay structure on nylon 6 nanocomposite morphology and properties10.1016/S0032-3861(02)00400-7 ↗
19. Combustion behaviour of epoxide based nanocomposites with ammonium and phosphonium bentonites10.1002/macp.200300047 ↗
20. Preparation and properties of montmorillonite/organo-soluble polyimide hybrid materials prepared by a one-step approach10.1023/A:1004834730883 ↗
21. The effect of clay on the thermal degradation of polyamide 6 in polyamide 6/clay nanocomposites10.1016/j.polymer.2005.02.078 ↗
22. Study on epoxy molding compounds modified by novel phosphorus-containing flame retardant and OMMT
23. Flame retardant mechanism of polyamide 6–clay nanocomposites10.1016/j.polymer.2003.11.036 ↗
24. The discovery of polymer–clay hybrids10.1002/pola.10961 ↗
25. Effects of production parameters on the structure of resol type phenolic resin/layered silicate nanocomposites10.1016/j.eurpolymj.2006.03.008 ↗
26. Real time exfoliation behavior of clay layers in epoxy–clay nanocomposites10.1021/cm0205837 ↗
27. Synthesis of epoxy–clay nanocomposites: influence of the nature of the clay on structure10.1016/S0032-3861(00)00346-3 ↗
28. Synthesis of epoxy–clay nanocomposites. Influence of the nature of the curing agent on structure10.1016/S0032-3861(00)00801-6 ↗
29. Mechanism of clay tactoid exfoliation in epoxy–clay nanocomposites10.1021/cm00059a023 ↗
30. Polymer interleaved layered double hydroxide: a new emerging class of nanocomposites10.1021/cm0110268 ↗
31. Synthesis and characterization of layered silicate–epoxy nanocomposites10.1021/cm00046a026 ↗
32. The effect of chemical modification on the fracture toughness of montmorillonite clay/epoxy nanocomposites10.1163/1568561042411204 ↗
33. Mechanical properties and failure surface morphology of amine-cured epoxy/clay nanocomposites10.1002/app.21357 ↗
34. Intercalation and exfoliation of clay nanoplatelets in epoxy-based nanocomposites: TEM and XRD observations10.1002/pen.20477 ↗
35. Thermal, mechanical and vibration characteristics of epoxy–clay nanocomposites10.1007/s10853-006-0278-2 ↗
36. Flame retarded polymer layered silicate nanocomposites: a review of commercial and open literature systems10.1002/pat.685 ↗
37. Use of different alkylammonium salts in clay surface modification for epoxy-based nanocomposites10.1002/pc.20667 ↗
38. Microcompounding of organoclay-ABS/PA6 blend-based nanocomposites10.1002/pc.20392 ↗
39. Epoxy/montmorillonite nanocomposites: influence of organophilic treatment on reactivity, morphology and fracture properties10.1016/j.polymer.2005.10.089 ↗
40. Clay mineral- and organoclay-polymer nanocomposite
41. Fire retardancy of polymer clay nanocomposites: is there an influence of the nanomorphology?10.1016/j.polymdegradstab.2008.02.013 ↗
42. Fire behaviour of polyamide 6/multiwall carbon nanotube nanocomposites10.1016/j.eurpolymj.2004.11.023 ↗
43. Phosphonium-modified layered silicate epoxy resins nanocomposites and their combinations with ATH and organo-phosphorus fire retardants10.1002/pat.686 ↗
44. Interfacial effects on the reinforcement properties of polymer–organoclay nanocomposites10.1021/cm960227m ↗
45. New age of polymer nanocomposites containing dispersed high-aspect-ratio silicate nanolayers10.1021/cm702860m ↗
46. Mechanical and thermal behavior of clay/epoxy nanocomposites10.1016/j.compscitech.2006.03.011 ↗
47. Fire properties of polystyrene–clay nanocomposites10.1021/cm000984r ↗
48. Morphology and toughness/stiffness balance of nanocomposites based upon anhydride-cured epoxy resins and layered silicates10.1002/(SICI)1521-3935(19990301)200:3<661::AID-MACP661>3.0.CO;2-4 ↗