Abstract
The polymer nanocomposites polystyrene (PS)/kaolinite (Kao) were synthesized by in situ emulsion polymerization. First Kao was modified using dimethylsulfoxide (DMSO) by a displacement method (Kao-DMSO) and then styrene monomer was intercalated into kaolinite. Two types of nanocomposites were synthesized using 1 and 3 % weight (wt) of Kao-DMSO, respectively, (based on the monomer). The comparison between TGA analyses of nanocomposites with 3 % Kao-DMSO and virgin PS revealed that the thermal decomposition of the nanocomposites with clay began at 20 °C above the temperature of the initial thermal decomposition of virgin PS. This result showed the effect of clay on the thermal stability of PS. The influence of 3 % Kao-DMSO clay on nanocomposites was also observed during a flame retarding test, in which the burning rate was reduced by 50 % when compared to the burning rate for virgin PS.
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Abbreviations
- Kao:
-
Kaolinite
- DMSO:
-
Dimethylsulfoxide
- Kao-DMSO:
-
Kaolinite-dimethylsulfoxide
- Wt:
-
Weight
- FTIR:
-
Fourier transform infrared spectroscopy
- XRD:
-
X-ray diffraction
- TEM:
-
Transmission electron microscopy
- PS:
-
Polystyrene
- DMTA:
-
Dynamic mechanical thermal analysis
- E′ :
-
Storage modulus
- Tg:
-
Glass transition temperature
- TGA:
-
Thermogravimetric analysis
- NMF:
-
N-Methylformamide
- HRSEM:
-
High-resolution scanning electron microscopy
- St:
-
Styrene
- KPS:
-
Potassium persulfate
- SLS:
-
Sodium lauryl sulfate
- PS/Kao-DMSO:
-
Polystyrene/kaolinite-dimethylsulfoxide
- tanδ :
-
Phase angle
- IR:
-
Intercalation rate
- T onset :
-
Thermal initial decomposition
- T 50 % :
-
Temperature at 50 % mass loss
- T 20 % :
-
Temperature at 20 % mass loss
- RW:
-
Residual weight
- KBr:
-
Potassium bromide
- CuKα :
-
Copper anode radiation
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de Macêdo Neto, J.C., Botan, R., Lona, L.M.F. et al. Polystyrene/kaolinite nanocomposite synthesis and characterization via in situ emulsion polymerization. Polym. Bull. 72, 387–404 (2015). https://doi.org/10.1007/s00289-014-1282-3
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DOI: https://doi.org/10.1007/s00289-014-1282-3