Release Time:2019-03-10  Hits:

Indexed by: Journal Article

Date of Publication: 2007-03-01

Journal: POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING

Included Journals: EI、SCIE

Volume: 46

Issue: 3

Page Number: 227-232

ISSN: 0360-2559

Key Words: ABS; intumescent flame retardant; montmorillonite; synergistic effects

Abstract: The synergistic effects of organic montmorillonite (OMMT) and intumescent flame retardant (IFR) based on the ammonium polyphosphate (APP) and pentaerythritol ( PER) on flame retardant enhancement of acrylonitrile-butadiene-styrene copolymer (ABS) were investigated by using the limiting oxygen index (LOI), the UL-94 (vertical flame) test, thermogravimetric analysis (TGA), x-ray diffractometry (XRD) and scanning electron microscopy (SEM). The LOI data and vertical flame tests show that OMMT has a synergistic flame retardant effect with IFR and the LOI value of ABS/OMMT/IFR (96/4/20) reaches 28.7%. The TGA data demonstrate that the incorporation of OMMT and IFR is very effective in enhancing the thermal stability of ABS/OMMT/IFR system at high temperature (T > 500 degrees C). The results of XRD show that the composite of ABS/OMMT is a kind of intercalated nano-composite and the gallery height of ABS/OMMT nanocomposite is 3.5 nm. The microstructures observed by SEM demonstrate that a suitable amount of OMMT with IFR can promote formation of compact intumescent charred layers in ABS blends.