TY - JOUR
T1 - The disorderly exfoliated LDHs/PMMA nanocomposites synthesized by in situ bulk polymerization
T2 - The effects of LDH-U on thermal and mechanical properties
AU - Wang, Guo An
AU - Wang, Cheng Chien
AU - Chen, Chuh Yung
N1 - Funding Information:
The authors would like to thank the Nation Science Council of the Republic of China for financially supporting this research under Contract No. NSC94-2216-E-006-039.
PY - 2006/10
Y1 - 2006/10
N2 - The disorderly exfoliated layered double hydroxides/poly(methyl methacrylate) (LDHs/PMMA) nanocomposites were obtained in a two-stage process by the in situ bulk polymerization of methyl methacrylate (MMA) in the presence of 10-undecenoate intercalated LDH (LDH-U). The dispersed behavior of the LDH-U in the PMMA matrix was identified by using X-ray diffraction (XRD), transmission electron microscopy (TEM), and UV/visible transmission spectroscopy. All these nanocomposites showed significantly enhancement of glass transition temperature (Tg) and the decomposition temperatures compared to pristine PMMA, as identified in differential scanning calorimetry (DSC) and thermogravimetric (TGA) analysis. The tensile modulus of these nanocomposites was also enhanced by incorporating the LDH-U into the PMMA matrix and increased as the amount of LDH-U increased. According to the analytical method of Ozawa-Flynn, the degradation activation energies of these nanocomposites are higher than that of pristine PMMA.
AB - The disorderly exfoliated layered double hydroxides/poly(methyl methacrylate) (LDHs/PMMA) nanocomposites were obtained in a two-stage process by the in situ bulk polymerization of methyl methacrylate (MMA) in the presence of 10-undecenoate intercalated LDH (LDH-U). The dispersed behavior of the LDH-U in the PMMA matrix was identified by using X-ray diffraction (XRD), transmission electron microscopy (TEM), and UV/visible transmission spectroscopy. All these nanocomposites showed significantly enhancement of glass transition temperature (Tg) and the decomposition temperatures compared to pristine PMMA, as identified in differential scanning calorimetry (DSC) and thermogravimetric (TGA) analysis. The tensile modulus of these nanocomposites was also enhanced by incorporating the LDH-U into the PMMA matrix and increased as the amount of LDH-U increased. According to the analytical method of Ozawa-Flynn, the degradation activation energies of these nanocomposites are higher than that of pristine PMMA.
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U2 - 10.1016/j.polymdegradstab.2006.03.008
DO - 10.1016/j.polymdegradstab.2006.03.008
M3 - Article
AN - SCOPUS:33745514066
SN - 0141-3910
VL - 91
SP - 2443
EP - 2450
JO - Polymer Degradation and Stability
JF - Polymer Degradation and Stability
IS - 10
ER -