Preparation and characterization of poly(butylene terephthalate) nanocomposites with various organoclays

Abstract

Layered-silicate-based polymer-clay nanocomposite materials were prepared depending on the surface modification of montmorillonite (MMT). Nanocomposites consisting of poly(butylene terephthalate) (PBT) as a matrix and dispersed inorganic clay modified with cetyl pyridinium chloride (CPC), benzyl dimethyl N-hexadecyl ammonium chloride, and hexadecyl trimethyl ammonium bromide by direct melt intercalation were studied. The organoclay loading was varied from 1 to 5 wt %. The organoclays were characterized with X-ray diffraction (XRD) to compute the crystallographic spacing and with thermogravimetric analysis to study the thermal stability. Detailed investigations of the mechanical and thermal properties as well as a dispersion study by XRD of the PBT/clay nanocomposites were conducted. X-ray scattering showed that the layers of organoclay were intercalated with intercalating agents. According to the results of a differential scanning calorimetry analysis, clay acted as a nucleating agent, affecting the crystallization. The PBT nanocomposites containing clay treated with CPC showed good mechanical properties because of intercalation into the polymer matrix.

Role of Polymer Interactions with Clays and Modifiers on Nanomechanical Properties and Crystallinity in Polymer Clay Nanocomposites

“…High viscosity PBT nanocomposites show improved mechanical, dynamic mechanical properties [16]. Several experimental studies conducted on PBT clay nanocomposites can be found in the literature [6,[13][14][15][16][17][18][19][20][21][22][23]. In this paper, PCN containing Nylon6 is referred to as Nylon6-PCN and the PCN containing PBT is referred to as PBT-PCN.…”

Preparation and relaxation dynamics of ethylene–propylene–diene rubber/clay nanocomposites with crosslinking interfacial design

“…The reaction between the MMT and the VD or CTAB readily occurred for 6 h. Then the organo‐MMT containing double bonds (VMMT) was obtained after washing with water and diethyl ether several times, filtering, and drying in a vacuum oven. In order to compare with VMMT, the organo‐MMT (OMMT) modified with CTAB without double bonds was also prepared as reported in the literature …”

Flammability, Thermal and Mechanical Properties of Polybutylene Terephthalate/Dolomite Composites

“…This result is similar to a study reported by Nirukhe and Shertukde on the effect of surface treatments and content of montmorillonite (MMT) on PBT. 25 They revealed that the addition of MMT significantly reduced the impact strength of the PBT/MMT composites, regardless the surface treatment of MMT, from approximately 52 MPa to 10 MPa for untreated MMT and to 20-30 MPa for treated MMT. It is also worth noting that the impact strength has similar trend to elongation at break where the addition of dolomite has detrimental effect on the composites.…”