Third Day Poster Session, 17 June 2010 - NanoTR-VI

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Poster Session, Thursday, June 17
Theme F686 - N1123
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Poly(Vinyl Chloride)/Kaolinite Nanocomposites
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UYasemin TurhanUP P*, Mehmet DoanP Mahir AlkanP
PBalikesir University, Faculty of Science and Literature, Department of Chemistry, 10145 Balikesir, Turkey
Abstract- Nanocomposites of poly(vinyl chloride) (PVC) have been prepared by solution intercalation method using both natural and
modified kaolinites. Kaolinite was modified with dimethyl sulfoxide (DMSO) to expand the interlayer basal spacing. The characterization of
PVC/kaolinite nanocomposites was made by X-ray diffraction (XRD) and transmission electron microscopy (TEM); the interactions between
kaolinite and PVC was discussed by FTIR-ATR; the thermal stability was determined by simultaneous DTA/TG. FTIR-ATR confirms
hydrogen bonds formed between dimethyl sulfoxide molecules and the inner surface hydroxyl groups of kaolinite. XRD and TEM results
give evidence that kaolinite was dramatically intercalated into nanoscale and homogenously dispersed in the PVC matrix. Thermogravimetric
analysis indicated that introduction of clay to the polymer network resulted in an increase in thermal stability. Ultraviolet (UV) absorbance
experiments showed that nanocomposites have a higher UV transmission than PVC film.
The synthesis and characterization of new and novel
materials are one of the main objectives of advanced
material research. Polymer nanocomposites, especially
polymer-layered silicate nanocomposites, have become a
valuable alternative to conventionally filled polymers and
are of current interest because of the fundamental questions
they address and their potential technological
applications.[1-4]
In this study, we synthesed nanocomposites with different
relative compositions based on PVC and both natural and
modified kaolinites by solution intercalation method.
Modified kaolinit was prepared with succunimide via questdisplacement
reaction. Figures 1, 2 and 3 show these
reactions.
the formation of residue and improve the thermal stability of
the polymer matrix. The intercalated composites exhibit
bigger UV transparency, but this transparency decreases with
increase in kaolinite amount. TEM results have showed that
the nanocomposites have both intercalated and exfloited
morphology as shown Figure 4.
Figure 1. Quest-displacement reaction
Figure 4. Processing of nanocomposite and tem image of clay and
nanocomposite
0,71nm +
Ultra saund field
120 h stirring
1,11 nm
The work was financially supported by Balikesir University
Research Fund (Project 2008/20).
DMSO
Figure 2. Intercalation of kaolinite with DMSO.( :O, :H, :S,
: C )
Figure 3. Quest-displacement reaction of DMSO between
SIM.( :O, :H, :S , :N, :C )
As a result, a series of nanocomposite materials consisting
of PVC and layered kaolinite clay were prepared by
effectively dispersing of the inorganic nanolayers of
kaolinite clay in PVC matrix by the solution intercalation
method FTIR-ATR, XRD, TEM, DTA/TG, BET and UV-
Vis spectrophotometer experiments were carried out to
characterize the morphology and properties of the
nanocomposites. By means of intercalation of kaolinite with
DMSO, the basal spacing of a natural kaolinite expanded
from 0.71 to 1.11 nm as shown in Figure 2. It has also been
observed that the organophilicity of kaolinite was enhanced.
The intercalation of KDMSO with SIM are intercalated in
the interlayer spaces of kaolinite by guest-displacement
method as shown in Figure 3.
Evidence from several spectroscopic and thermal
analysis shows that SIM replaces the DMSO molecules. The
incorporation of nanoparticle with polymer results in an
increase in thermal stability. The nanocomposites enhance
*Corresponding author:yozdemir@balikesir.edu.tr
[1] Pinnavaia, T.J., Beall, G.W.,2000. Polymer-Clay
Nanocomposites. United Kingdom, U.K: Wiley Series in Polymer
Science; Wiley Chichester.
[2] Viville, P., Lazzaroni, R., Pollet, E., Alexandre, M., Dubois, P.,
Borcia, G., Pireaux, J. J.,2003. Surface characterization of poly(_-
caprolactone)-based nanocomposites,, Langmuir, 19: 9425–9433.
[3] Alexandre, M., Dubois, P., 2000. Polymer-layered silicate
nanocomposites:Preparation, properties, and uses of a new class of
materials,, Mater. Sci.Eng., 28 (1-2): 1–63.
[4] Turhan, Y., Doan, M.,Alkan, M., 2010. Poly(vinyl
chloride)/Kaolinite Nanocomposites: Characterization and Thermal
and Optical Properties,, Ind. Eng. Chem. Res.,49: 1503-1513.
6th Nanoscience and Nanotechnology Conference, zmir, 2010 725