Effect of expandable graphite on flame retardant, thermal and mechanical properties of thermoplastic polyurethane composites filled with huntite&hydromagnesite mineral

Guler T., Tayfun U., Bayramli E., DOĞAN M.

THERMOCHIMICA ACTA, cilt.647, ss.70-80, 2017 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 647
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1016/j.tca.2016.12.001
  • Dergi Adı: THERMOCHIMICA ACTA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.70-80
  • Anahtar Kelimeler: Thermoplastic polyurethane, Huntite&hydromagnesite, Fire retardancy, Expandanle graphite, Mechanical properties, MAGNESIUM-HYDROXIDE, FLAMMABILITY CHARACTERIZATION, COMBUSTION CHARACTERISTICS, SYNTHETIC HYDROMAGNESITE, AMMONIUM POLYPHOSPHATE, POLYMER COMPOSITES, DEGRADATION, BEHAVIOR, TPU, NANOCOMPOSITES
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

The effect of expandable graphite (EG) was studied on the flame retardant, thermal and mechanical properties of thermoplastic polyurethane (TPU) containing huntite&hydromagnesite (HH). According to the flammability tests results, the synergistic interaction was observed between HH and EG. The maximum limiting oxygen index (LOI value was observed at a ratio of 1:1 (HH:EG) and the highest vertical burning test (UL-94) rating of V0 was observed at a ratios of 4:1, 3:2 and 1:1. The synergistic interaction between EG and HH was also deduced at low percentage of EG (10%) by the help of the mass loss calorimeter test results. Mechanical test observations revealed that the inclusion of HH reduced the tensile strength and elongation at break values and increased the elastic modulus and glass transition temperature of pristine TPU. The addition of EG was further improved the elastic modulus of composites as the loaded amount of EG increased. (C) 2016 Elsevier B.V. All rights reserved.