Flammability and thermal behaviors of polypropylene composite containing modified kaolinite

Abstract

Exfoliatied kaolinite (E‐Kaol) was prepared by intercalating DMSO and KAc into kaolinite successively followed by irradiation under ultrasonic. The modified kaolinite was then introduced to polypropylene (PP) by melt blending in order to improve the fire performance of the composite. The flammability and thermal behaviors of PP composite were analyzed by limit oxygen index, vertical burning test, cone calorimeter test, and thermal‐gravimetric analysis, respectively. The microstructure of PP composites was characterized by Fourier‐transformed infrared spectroscopy, X‐ray diffraction, and scanning electron microscope (SEM). It was demonstrated the presence of only 1 phr E‐Kaol could improve the LOI values of PP/MCAPP/ATH composite from 26.4 to 28.0, and decrease the peak value of heat release rate and smoke production rate of the PP/MCAPP/ATH by 60.7% and 39.1%, respectively, compared with that of PP sample. Morphology analysis by SEM showed that E‐Kaol in PP composite was beneficial to forming rigid and compact char structure. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41761.

Synergistic effects of modified hydrotalcite on improving the fire resistance of ethylene vinyl acetate containing intumescent flame retardants

“…The results implied that the best synergist effect of SA‐LDH/IFR occurred at relatively low SA‐LDH content. The similar trend has also been found in other nano‐sized particles/IFR system .…”

Synthesis of 4A zeolite containing la from kaolinite and its effect on the flammability of polypropylene

“…Intumescent flame retardants (IFR) have been successfully used in many polymers including PP . In this work, the combination of microencapsulation of ammonium polyphosphate (MCAPP) and pentaerythritol phosphate (PEPA) at mass ratio of 2:1 were selected as IFR, which can improve water resistance and compatibility with PP.…”

Influence of expandable graphite on flame retardancy and mechanical properties of organic–inorganic hybrid material based on sodium silicate and polyisocyanate

“…In order to assess the fire performance of materials more comprehensively, the fire performance index (FPI) (TTI/ PHRR) and fire growth index (FGI) (PHRR/T PHRR ) are introduced [14,25]. Table 2 gives the details of FPI and FGI.…”

“…But these common additives cannot meet the demand for low emission of toxic gas, good flame-retardant property [12,13]. In recent years, kaolinite [14], glass fibers [15], montmorillonite [16] and other fillers have been widely used to improve the properties of polymer materials.…”