Poly(etherimide)/montmorillonite nanocomposites prepared by melt intercalation

Abstract

ABSTRACT:A novel aromatic amine organo-modifier synthesized in our previous work was used to treat montmorillonite (MMT) and the organo-modified MMT was used to prepare poly(etherimide) (PEI)/MMT nanocomposites by a melt intercalation method. MMT treated by this amine exhibited large layer-to-layer spacing and a high ion-exchange ratio (Ͼ95%). The nanocomposites were characterized with X-ray diffraction (XRD), transmission electron microscopy (TEM), dynamic mechanical analysis, a universal tester, thermogravimetric analysis, and by differential scanning calorimetry. The results of XRD and TEM showed that the nanocomposites formed exfoliated structures even when the MMT content was 10 wt %. When the MMT content was below 3 wt %, the PEI/MMT nanocomposites were strengthened and toughened at the same time. The nanocomposites also showed marked decreases in coefficient of thermal expansion and solvent uptake.

The TiO2–Clay-LDPE Nanocomposite Packaging Films: Investigation on the Structure and Physicomechanical Properties

“…The presence of nanoclays in packaging films increased the thermal quality and stability of nanocomposite films [11] . According to Liang and Yin, the exfoliated montmorillonite in poly-etherimide (PEI) resulted in improvement in the onset temperature of thermal degradation from 522 C for PEI to 534 C for the PEI-clay nanocomposite containing about 10 wt.% organo-clay [12] .…”

MoS2 Nanoplatelet Fillers for Enhancement of the Properties of Waterborne Pressure-Sensitive Adhesives

“…1 The use of inorganic nanoparticles with different shapes, e.g, platelets, spheres or tubes, as fillers in a polymer matrix has attracted increasing interest owing to the attractive properties arising from their small size and large aspect ratios, with applications in structural engineering, drug delivery, etc. 2,3 These polymer nanocomposites can be produced by different methods such as in situ polymerization, 4,5 where the polymerization is performed in the presence of nanoparticles; melt blending, [6][7][8] where a polymer is blended with nanoparticles and then annealed at a temperature above the glass transition temperature of the polymer to form the nanocomposite; or solution blending, [9][10][11] where the blending of polymer and nanoparticles is performed in a suitable solvent. For the production of waterborne nanocomposites for application as paints, coatings and adhesives, two main methods have been reported: (1) emulsion mixing and (2) in situ polymerization in suspension, 12 emulsion [13][14][15][16] and miniemulsion.…”

Processability, Structure and Mechanical Properties of Poly(ether imide)/Amorphous Copolyester Blends

“…However, it offers poor processability (injection molding temperature from 310 to 350 8C) and reduced solvent resistance. [4][5][6] Many studies on PEI based blends have been carried out to ameliorate the global performance of the end products. Thus, studied miscible blends of PEI include those with poly(ether ether ketone) (PEEK), [7][8][9] poly(butylene terephthalate) (PBT), [4,5] poly(trimethylene terephthalate) (PTT), [10] poly(ethylene naphthalate) (PEN), [11] poly(butylene naphthalate) [12] and polyphenylsulfone.…”