Colloidal boehmite particles have been included into a polyethylene terephthalate matrix by in situ polymerization. Boehmite nanoparticles were produced by the controlled hydrolysis of aluminium isopropylate. The nano...Colloidal boehmite particles have been included into a polyethylene terephthalate matrix by in situ polymerization. Boehmite nanoparticles were produced by the controlled hydrolysis of aluminium isopropylate. The nanoparticles were characterized using Transmitted Electronic Microscopy (TEM) and X-ray Diffraction (XRD), which revealed the particles of magnitude about 10 nm. The particles have been used without any surface modification. Characterization of the nanocomposite has been carried out using TEM and differential scanning calorimetry (DSC). TEM images indicate that the particles have been homogeneously dispersed in the polymer. DSC results show that the presence of boehmite affects the process of crystallization of polyethylene terephthalate.展开更多
The vermiculite(VMT) was treated at high temperature or by microwave and modified by treatment with different intercalaling agents:reagent A, which was synthesised in our lab, hexadecyl trimethyl ammonium chloride and...The vermiculite(VMT) was treated at high temperature or by microwave and modified by treatment with different intercalaling agents:reagent A, which was synthesised in our lab, hexadecyl trimethyl ammonium chloride and octadecylamine to give organo-vermiculite(OVMT). The polyethylene terephthalate(PET)/vermiculite composite was obtained from OVMT with in situ polymerized PET. The cation exchange capacity of VMT was found increased apparently after chemical treatments. The spacing of layers in VMT was increased to 4.65 nm after intercalation with different organic reagents. The structure of PET/VMT nanocomposites synthesized was studied by FTIR、 XRD and TEM. The DSC results showed that the PET/VMT nanocomposite has T g of 137.16 ℃ and melting point of 235.76 ℃.展开更多
基金Supported by Ningbo Natural Science Foundation (No.2006A610067)
文摘Colloidal boehmite particles have been included into a polyethylene terephthalate matrix by in situ polymerization. Boehmite nanoparticles were produced by the controlled hydrolysis of aluminium isopropylate. The nanoparticles were characterized using Transmitted Electronic Microscopy (TEM) and X-ray Diffraction (XRD), which revealed the particles of magnitude about 10 nm. The particles have been used without any surface modification. Characterization of the nanocomposite has been carried out using TEM and differential scanning calorimetry (DSC). TEM images indicate that the particles have been homogeneously dispersed in the polymer. DSC results show that the presence of boehmite affects the process of crystallization of polyethylene terephthalate.
文摘The vermiculite(VMT) was treated at high temperature or by microwave and modified by treatment with different intercalaling agents:reagent A, which was synthesised in our lab, hexadecyl trimethyl ammonium chloride and octadecylamine to give organo-vermiculite(OVMT). The polyethylene terephthalate(PET)/vermiculite composite was obtained from OVMT with in situ polymerized PET. The cation exchange capacity of VMT was found increased apparently after chemical treatments. The spacing of layers in VMT was increased to 4.65 nm after intercalation with different organic reagents. The structure of PET/VMT nanocomposites synthesized was studied by FTIR、 XRD and TEM. The DSC results showed that the PET/VMT nanocomposite has T g of 137.16 ℃ and melting point of 235.76 ℃.
