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Study on a novel and efficient flame retardant synergist–nanoporous nickel phosphates VSB‐1 with intumescent flame retardants in polypropylene
Author(s) -
Nie Shibin,
Hu Yuan,
Song Lei,
He Shuqing,
Yang Dandan
Publication year - 2008
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1088
Subject(s) - intumescent , ammonium polyphosphate , fire retardant , materials science , polypropylene , pentaerythritol , x ray photoelectron spectroscopy , nuclear chemistry , nanoporous , chemical engineering , composite material , chemistry , nanotechnology , engineering
Nanoporous nickel phosphate VSB‐1 was synthesized by hydrothermal method and its structure was characterized. Then VSB‐1 was added to the ammonium polyphosphate (APP) and pentaerythritol (petol) system in a polypropylene (PP) matrix for the first time, and the synergistic effect of VSB‐1 with intumescent flame retardants (IFR) was studied. With the addition of 2 wt% VSB‐1 and 23 wt% IFR, the LOI value of PP/IFR composites increased from 28.0 to 35.5. The UL‐94 test showed that PP with 20% IFR burned and had no rating, but with the addition of 2 wt% of VSB‐1 and 18% of IFR, it could reach V‐0 rating. The results of the X‐ray photoelectron spectroscopy (XPS) showed that the ratios of P/C and N/C of PP/IFR/VSB‐1 systems changed significantly from 0.133 to 0.205 (54% increase) and from 0.0328 to 0.047 (45.4% increase), respectively under 800°C for 10 min. Compared with the organophilic montmorillonite (OMT), 4 Å zeolite, and zinc tetraborate (ZB), VSB‐1 showed better synergistic effect at the same loading. Copyright © 2008 John Wiley & Sons, Ltd.