Thermal characterization and flammability of polypropylene containing sepiolite-APP combinations

KAYNAK URAZ E., Ureyen M. E., Koparal A. S.

E-POLYMERS, cilt.17, sa.4, ss.341-348, 2017 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 17 Sayı: 4
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1515/epoly-2016-0275
  • Dergi Adı: E-POLYMERS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.341-348
  • Anahtar Kelimeler: cone calorimetry, flame retardant, polypropylene, sepiolite, simultaneous thermal analysis, FLAME-RETARDANT POLYPROPYLENE, ORGANICALLY MODIFIED SEPIOLITE, ZINC BORATE, NANOCOMPOSITES, COMPOSITES, FIRE, INTUMESCENT, PHOSPHORUS, BEHAVIOR, POLYMER
  • Anadolu Üniversitesi Adresli: Evet

Özet

The effects of sepiolite on fire behavior of ammonium polyphosphate-based intumescent flame retardant (IFR)/polypropylene (PP) were investigated. The disaggregation of sepiolite bundles has been provided by wet-milling as the zeta potential value decreased from -9.6 to -31.3 mV.PP and additives were compounded by a twin-screw extruder and molded by injection. A total additive content of 20 wt% in PP and various proportions of sepiolite (1.0-10.0 wt%) in flame retardant (FR) formulation were studied. The flammability of the samples was measured by limit oxygen index (LOI) test and cone calorimetry. The LOI of neat PP (19%) was increased to 32.2% when sepiolite and IFR were used. The peak heat release rate of neat PP (1566.4 kW/m(2)) was also significantly reduced (94.7 kW/m(2)) when sepiolite was added with IFR. Thermal analyses results showed that, at higher temperature (700 degrees C), IFR and sepiolite increased the char residue (9 wt%) compared to neat PP (0 wt%).