Journal
JOURNAL OF POLYMER RESEARCH
Volume 16, Issue 5, Pages 537-543Publisher
SPRINGER
DOI: 10.1007/s10965-008-9257-4
Keywords
Polypropylene; Intumescent; Flame retardant; Combustion
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Funding
- QUST [0022355, 0022394]
- Foundation of State Key Laboratory of Fire Science [HZ2008-KF01]
- National Natural Science Foundation of China [50876048]
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The effects of hydroxy silicone oil as a synergistic agent on the flame retardancy of intumescent flame retardant polypropylene composites (IFR-PP) were studied, and the IFR system mainly consisted of the ammonium polyphosphate (APP), melamine (MEL) and pentaerythritol (PER). The UL 94 rating, thermogravimetric analysis (TGA), cone calorimeter (CONE) and digital photograph were used to evaluate the synergistic effects of hydroxy silicone oil (HSO). It has been found that the PP composite containing only APP, MEL and PER does not show good flame retardancy at 30% additive level. The cone calorimeter results show that the heat release rate, mass loss rate, mass, total heat release, carbon monoxide and carbon dioxide of PP/APP/MEL/PER/HSO composites decrease in comparison with the PP/APP/MEL/PER composite. The digital photographs demonstrated that HSO could promote to form the homogenous and compact intumescent char layer. Thus, a suitable amount of HSO plays a synergistic effect in the flame retardancy.
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