Effect of ammonium polyphosphate and melamine pyrophosphate on fire behavior and thermal stability of unsaturated polyester synthesized from poly(ethylene terephthalate) waste

• Published in: Macromolecular research Vol. 26; no. 1; pp. 22 - 28
• Main Authors: Nguyen, ThuHien, Hoang, DongQuy, Kim, Jinhwan
• Format: Journal Article
• Language: English
• Published: Seoul The Polymer Society of Korea 01.01.2018; Springer Nature B.V; 한국고분자학회
• Subjects: Additives; Characterization and Evaluation of Materials; Chemical industry; Chemistry; Chemistry and Materials Science; Complex Fluids and Microfluidics; Decomposition; Ethylene; Flame retardants; Flammability; Fourier transforms; Melamine; Nanochemistry; Nanotechnology; Physical Chemistry; Polyesters; Polyethylene terephthalate; Polymer Sciences; Proofing; Quality; Soft and Granular Matter; Spectrum analysis; Stability analysis; Thermal stability; Thermogravimetric analysis; X ray photoelectron spectroscopy; 고분자공학; melamine pyrophosphate; fire proofing; ammonium polyphosphate; unsaturated polyester; thermal stability; PET waste
• ISSN: 1598-5032; 2092-7673
• DOI: 10.1007/s13233-018-6004-5

The fire behavior and thermal stability of unsaturated polyester prepared from recycled poly(ethylene terephthalate) (RUP) in the present of two phosphorus-nitrogen flame retardants (FRs) including ammonium polyphosphate (APP) and melamine polyphosphate (MPP) have been investigated. The effectiveness of FRs on the fire proofing of material was test by UL-94 vertical classification and limiting oxygen index (LOI). The obtained data showed that the fire retardancy and thermal stability were remarkably enhanced with addition of FRs. The best grade of UL-94V standard, V-0 ranking was attained as loading of 25 wt% of APP or 30 wt% of MPP. LOI significantly were enhanced from 20 to 36%. Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and Scanning electron microscope (SEM) were applied to determine the structure and morphology of char layers of RUP and RUP/FR mixtures. Thermogravimetric analysis (TGA) method was applied to investigate thermal stability of neat RUP, FRs, and RUP/FR and to evaluate kinetic parameters of the decomposition of RUP/FR. The mechanism of action of FRs, schemes for the possible decomposition mechanism RUP and FRs, and the cooperation of matrix and additives were also discussed.