Triazole-, piperazine-, and DOPO-containing eugenol-based reactive flame retardant for unsaturated polyester resin

Özükanar Ö., Sagdic G., ÇAKMAKÇI E., Özmen F. K., Üreyen M. E., Günay U. S., ...Daha Fazla

Journal of Applied Polymer Science, cilt.141, sa.43, 2024 (SCI-Expanded, Scopus)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 141 Sayı: 43
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1002/app.56127
  • Dergi Adı: Journal of Applied Polymer Science
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Aerospace Database, Applied Science & Technology Source, Biotechnology Research Abstracts, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: flame retardance, radical polymerization, resins, thermal properties, thermosets
  • Marmara Üniversitesi Adresli: Evet

Özet

The flammability of unsaturated polyester resins (UPRs) limits their applications. Herein, a reactive P- and N-containing flame retardant (DPET) having triazole and piperazine rings is reported. The 9,10-Dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO) was used to introduce P atoms, and eugenol was used to import reactive double bonds to DPET. Different ratios of DPET were mixed with a commercial UPR and the thermal, mechanical, optical, and flame retardancy properties were measured. The addition of 15% of DPET into neat UPR led to a decrease in the water contact angle from 70° ± 2 to 61° ± 2. The gel content values of the UPRs were found to change between 97.5% and 89%. The optical properties of the UPR were adversely affected by the incorporation of DPET. The modulus of the DPET-containing UPRs increased with increasing amount of DPET and 15% of DPET-containing UPR displayed a modulus value of 1784 ± 86 MPa. When 15% DPET was added to neat UPR, char yields were increased (from 5.6% to 16.6%). Limiting oxygen index (LOI) values increased with increasing amounts of DPET and reached up to 23.4%. Micro cone calorimeter (MCC) test results showed up to a 20.5% reduction in the peak heat release rate (PHRR) of the UPR when 15% DPET was added.