The polyacrylamide(PAM)/α-zirconium phosphate(α-ZrP) nanocomposite was synthesized by in situ intercalative polymerization of acrylamide monomer with α-ZrP exfoliated by methylamine.Its structure and morphology wer...The polyacrylamide(PAM)/α-zirconium phosphate(α-ZrP) nanocomposite was synthesized by in situ intercalative polymerization of acrylamide monomer with α-ZrP exfoliated by methylamine.Its structure and morphology were characterized by X-ray diffraction(XRD) and transmission electron microscopy(TEM).The results demonstrated that the interlayer distance of α-ZrP was expanded effectively after the polymerization of acrylamide,even forming exfoliated nanocomposite.Both XRD and TEM image confirmed that the most of the layers of α-ZrP were dispersed well in the polymer matrix,and the PAM/α-ZrP intercalated nanocomposite with the d-spacing of about 1.5 nm can be obtained at a high loading of α-ZrP(mass fraction ≥10%).At the same time,some of the layers of α-ZrP were exfoliated and dispersed disorderly in the PMA matrix.展开更多
Polybutadiene(PB)/Montmorillonite(MMT) nanocomposites were prepared by in situ polymerization through anionic polymerization technique.The structure of the nanocomposites was characterized by using XRD and H\|NMR.XRD ...Polybutadiene(PB)/Montmorillonite(MMT) nanocomposites were prepared by in situ polymerization through anionic polymerization technique.The structure of the nanocomposites was characterized by using XRD and H\|NMR.XRD results showed that the crystalline spacing in clay was increased,indicating the intercalation of PB chains in MMT crystallites, and both intercalated and exfoliated nanocomposites were prepared.From the H NMR spectra of PB and PB/MMT nanocomposites,it could be seen that the microstucture of PB was influenced by MMT.The 1,2 units content of PB molecules increased with the introduction of MMT.The dynamic properties of nanocomposites were measured by DMA.The results showed that T g and storage modulus were increased ,tan δ was decreased with MMT added,indicating that MMT has strong interaction with PB so as to reduce the friction among the chains of PB.The results of TGA revealed that the nanocomposites have better thermal stability than PB.展开更多
文摘The polyacrylamide(PAM)/α-zirconium phosphate(α-ZrP) nanocomposite was synthesized by in situ intercalative polymerization of acrylamide monomer with α-ZrP exfoliated by methylamine.Its structure and morphology were characterized by X-ray diffraction(XRD) and transmission electron microscopy(TEM).The results demonstrated that the interlayer distance of α-ZrP was expanded effectively after the polymerization of acrylamide,even forming exfoliated nanocomposite.Both XRD and TEM image confirmed that the most of the layers of α-ZrP were dispersed well in the polymer matrix,and the PAM/α-ZrP intercalated nanocomposite with the d-spacing of about 1.5 nm can be obtained at a high loading of α-ZrP(mass fraction ≥10%).At the same time,some of the layers of α-ZrP were exfoliated and dispersed disorderly in the PMA matrix.
文摘Polybutadiene(PB)/Montmorillonite(MMT) nanocomposites were prepared by in situ polymerization through anionic polymerization technique.The structure of the nanocomposites was characterized by using XRD and H\|NMR.XRD results showed that the crystalline spacing in clay was increased,indicating the intercalation of PB chains in MMT crystallites, and both intercalated and exfoliated nanocomposites were prepared.From the H NMR spectra of PB and PB/MMT nanocomposites,it could be seen that the microstucture of PB was influenced by MMT.The 1,2 units content of PB molecules increased with the introduction of MMT.The dynamic properties of nanocomposites were measured by DMA.The results showed that T g and storage modulus were increased ,tan δ was decreased with MMT added,indicating that MMT has strong interaction with PB so as to reduce the friction among the chains of PB.The results of TGA revealed that the nanocomposites have better thermal stability than PB.
