The flame-retardant properties and mechanisms of poly(ethylene terephthalate)/hexakis (para-allyloxyphenoxy) cyclotriphosphazene systems

2015 ◽  
Vol 132 (44) ◽  
pp. n/a-n/a ◽  
Author(s):  
Jiawei Li ◽  
Feng Pan ◽  
Xiandong Zeng ◽  
Hong Xu ◽  
Linping Zhang ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Ethylene Terephthalate ◽  
Poly Ethylene Terephthalate ◽  
Flame Retardant Properties ◽  
Poly Ethylene

Investigation of Flame Retardant Properties of Poly(ethylene Terephthalate)/Silatrane Complex/Montmorillonite Nanocomposites

2013 ◽  
Vol 747 ◽  
pp. 43-46
Author(s):  
Phawittra Sonsilchai ◽  
Duangdao Aht-Ong
Keyword(s):  
Mechanical Properties ◽  
Flame Retardant ◽  
Ethylene Terephthalate ◽  
Synergistic Effects ◽  
One Pot ◽  
Poly Ethylene Terephthalate ◽  
Twin Screw ◽  
Ft Ir ◽  
Flame Retardant Properties ◽  
Poly Ethylene

Poly (ethylene terephthalate) or PET was used in many applications such as packagings, textiles, electrical devices, and auto parts as well due to its good mechanical properties and dimensional stabilities, etc. However, the main drawback of PET is poor flame retardant and melt-dripping, which needed to be solved. Therefore, the aim of this research was to improve the flame retardant properties of PET by investigating the synergistic effects of flame retardant agents between silatrane complex and montmorillonite (MMT) at various concentrations. Silatrane complex was synthesized from silica through one pot process. The characteristic of the obtained silatrane complex was determined by FT-IR, SEM, and TGA. Various ratios of PET/silatrane complex/MMT nanocomposites were prepared by melt bending using a twin screw extruder and compressed into standard shape according to ASTM standard by a compression molding, respectively. Morphology, flame retardant properties, and mechanical properties of PET nanocomposites were investigated. The flame retardant properties were evaluated by LOI values and UL-94V rating. The results showed that mechanical properties of PET/silatrane complex/MMT nanocomposites were slightly different from those of the neat PET. The flame retardant properties showed that the LOI values of PET/silatrane complex/MMT nanocomposites were greater than that of neat PET and increased with increasing the silatrane complex concentration. The LOI value of PET/7%silatrane/2%MMT nanocomposite was increased up to 60.75%, compared with that of neat PET. While neat PET was classified into V-2 rating since it showed sustainable burning and melt-dripping behavior during burning process, PET/silatrane complex/MMT nanocomposites did not show such behavior and thus could be designated as V-0 rating. In addition, the results indicated that the MMT could occur synergistic effect with silatrane complex as well.

Preparation and Characterization of Flame Retardant PET Fiber via Melt Blending

2018 ◽  
Vol 913 ◽  
pp. 729-737
Author(s):  
Hui Ling Xu ◽  
Hong Kun Bao ◽  
Chao Sheng Wang ◽  
Hua Ping Wang
Keyword(s):  
Flame Retardant ◽  
Ethylene Terephthalate ◽  
Carbon Layer ◽  
Melt Blending ◽  
Fiber Fracture ◽  
Limiting Oxygen Index ◽  
Poly Ethylene Terephthalate ◽  
Blending Method ◽  
Poly Ethylene

Poly(ethylene terephthalate) (PET) fiber with excellent flame retardant property was prepared with introducing a containing phosphorus flame retardant 10-(2’,5’-dihydroxyphenyl) -9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (ODOPB) into PET by melt blending method. The intrinsic viscosity of the modified PET was decreased after melt blending, indicated that ODOPB could promote the degradation of PET. The addition of ODOPB can increase the amount of carbon residue of PET, which can effectively reduce the heat transfer. The movement and regularity of PET molecular chain are affected by ODOPB, resulting in the reducing of the crystallization of PET. The Raman curves indicate that the addition of ODOPB can improve the regularity of carbon layer, which is conducive to achieve the effect of flame retardant. When the mass fraction of P is 0.7 %, the limiting oxygen index of sample reaches 32.4% and UL-94 vertical reaches V-2, the fiber fracture strength is 2.6 cN/dtex, which has excellent flame retardant and mechanical properties.

scholarly journals Construction of Carbon Microspheres-Based Silane Melamine Phosphate Hybrids for Flame Retardant Poly(ethylene Terephthalate)

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 545 ◽  
Author(s):  
Baoxia Xue ◽  
Ruihong Qin ◽  
Jie Wang ◽  
Mei Niu ◽  
Yongzhen Yang ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Ethylene Terephthalate ◽  
Hydrothermal Reaction ◽  
Reaction System ◽  
Fire Risk ◽  
Carbon Microspheres ◽  
Limiting Oxygen Index ◽  
Melamine Phosphate ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

To improve the flame retardancy and inhibit the smoke of poly(ethylene terephthalate) (PET), carbon microspheres (CMSs)-based melamine phosphate (MP) hybrids (MP-CMSs) were constructed in situ with the introduction of CMSs into the hydrothermal reaction system of MP. The integrated MP-CMSs were modified by 3-Aminopropyltriethoxysilane (APTS) to obtain the silane MP-CMSs (SiMP-CMSs) to strengthen the interface binding between the MP-CMSs and PET matrix. The results showed that the SiMP layer was loaded on the CMSs surface. The addition of only 3% SiMP-CMSs increased the limiting oxygen index (LOI) value of the PET from 21% ± 0.1% to 27.7% ± 0.3%, reaching a V-0 burning rate. The SiMP-CMSs not only reduced heat damage, but also inhibited the smoke release during PET combustion, whereupon the peak heat release rate (pk-HRR) reduced from 513.2 to 221.7 kW/m2, and the smoke parameters (SP) decreased from 229830.2 to 81892.3 kW/kg. The fire performance index (FPI) rose from 0.07 m2s/kW to 0.17 m2s/kW, demonstrating the lower fire risk. The proportion of the flame-retardant mode in the physical barrier, flame inhibition, and char effects were recorded as 44.53%, 19.04%, and 9.04%, respectively.

scholarly journals Novel Oligo-Ester-Ether-Diol Prepared by Waste Poly(ethylene terephthalate) Glycolysis and Its Use in Preparing Thermally Stable and Flame Retardant Polyurethane Foam

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 236 ◽  
Author(s):  
Cuong N. Hoang ◽  
Chi T. Pham ◽  
Thu M. Dang ◽  
DongQuy Hoang ◽  
Pyoung-Chan Lee ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Polyurethane Foam ◽  
Flame Retardancy ◽  
Ethylene Terephthalate ◽  
Recycled Pet ◽  
Pet Bottles ◽  
Poly Ethylene Terephthalate ◽  
Ul 94 ◽  
Poly Ethylene ◽  
Fire Properties

Rigid polyurethane foam (PUF) was successfully prepared from a novel oligo-ester-ether-diol obtained from the glycolysis of waste poly(ethylene terephthalate) (PET) bottles via reaction with diethylene glycol (DEG) in the presence of ZnSO4 7H2O. The LC-MS analysis of the oligodiol enabled us to identify 67 chemical homologous structures that were composed of zero to four terephthalate (T) ester units and two to twelve monoethylene glycol (M) ether units. The flame retardant, morphological, compression, and thermal properties of rigid PUFs with and without triphenyl phosphate (TPP) were determined. The Tg values showed that TPP played a role of not only being a flame retardant, but also a plasticizer. PUF with a rather low TPP loading had an excellent flame retardancy and high thermal stability. A loading of 10 wt % TPP not only achieved a UL-94 V-0 rating, but also obtained an LOI value of 21%. Meanwhile, the PUF without a flame retardant did not achieve a UL-94 HB rating; the sample completely burned to the holder clamp and yielded a low LOI value (17%). The fire properties measured with the cone calorimeter were also discussed, and the results further proved that the flame retardancy of the PUF with the addition of TPP was improved significantly. The polymeric material meets the demands of density and compression strength for commercial PUF, as well as the needs of environmental development. The current study may help overcome the drawback of intrinsic high flammability and enlarge the fire safety applications of materials with a high percentage of recycled PET.

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