Release Time:2019-03-10  Hits:

Indexed by: Journal Article

Date of Publication: 2008-06-01

Journal: POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING

Included Journals: EI、SCIE

Volume: 47

Issue: 6

Page Number: 613-618

ISSN: 0360-2559

Key Words: halogen-free flame retardant ABS; intumescent flame retardant; synergistic effect; zeolite

Abstract: Ammonium polyphosphate (APP) and pentaerythritol (PER) were selected to form intumescent flame-retardant (IFR) and halogen-free flame-retardant ABS/IFR/zeolite composites were prepared by melt blending. The influences of zeolite 4A, 13X on thermal behavior of mass loss, flame-retardant performance, microstructure, mechanical properties, and processability of composites were investigated. The results showed that zeolite 4A with a lower Si/Al ratio, stronger surface polarity, and lower loading not only had a better synergistic effect with IFR, which promoted the catalytic esterification of IFR, stabilized the charred residue, and made ABS/IFR composites possess higher flame-retardant performance, but also was beneficial to improving the mechanical properties and processability of composites. When the content of zeolite 4A was 1wt%, ABS/IFR composites had better comprehensive properties. Its limiting oxygen index (LOI) value, impact strength, tensile strength, flexural strength, modulus, and melt index were 32.6%, 3.4KJ/m(2), 39MPa, 38.7MPa, 1337MPa, and 24.5 g/10 min, respectively.