Properties of fire agent integrated with molecular sieve and tetrafluoroborate ionic liquid in thermoplastic polyurethane elastomer

Abstract

Thermoplastic polyurethane (TPU) elastomer has a widely application because of its perfect physical and chemical properties. However, it was limited by its low reliability in fire safety. In this paper, a new fire agent integrated with molecular sieve and tetrafluoroborate ionic liquid ([EOOEMIm][BF 4 ]) was used to improve fire safety of TPU.The fire safety of TPU composites was investigated by cone calorimeter test, smoke density test, and thermogravimetric/infrared spectroscopy, respectively. The results showed that modified molecular sieve (MMS) can improve fire safety of TPU effectively. The luminous flux increased to 10.10%, total smoke release decreased by 58%, and heat release rate declined of 65% than pure TPU when the addition of MMS was 0.5 wt%. In addition, MMS can improve thermal stability of TPU even in nitrogen according to thermogravimetric/infrared spectroscopy test. These proved that MMS has a satisfactory application prospect in fire safe polymer materials.

Synergistic Effect of 4A Molecular Sieve on Intumescent Ternary H-Bonded Complex in Flame-Retarding of Polypropylene

“…This is because the incorporated TH-IFR additives decompose earlier and show a positive influence on the degradation and carbonization of the composites. The reason for the lowest T onset (290 °C) of TH-IFR/4A/PP1 FR material is that the introduction of the 4A synergist would change the pyrolysis process of the system [ 31 ], resulting in earlier degradation and carbonization of the entire system. In the meantime, the incorporation of the excessive 4A particles (≥2 wt%) would delay the degradation and carbonization of the FR composites.…”

“…Many studies have achieved the desired flame-retardant effect by adding different inorganic synergists, including graphene, montmorillonite, metal oxides, zeolite and polyoxometalate [ 24 , 25 , 26 , 27 , 28 ]. The 4A molecular sieve (4A) is a synthetic aluminosilicate with an effective aperture of about 0.4 nm and a three-dimensional network structure composed of SiO 4 and AlO 4 tetrahedrons combined with the common oxygen atoms [ 29 , 30 , 31 ]. Its unique structure and composition make 4A have good thermal stability, absorptivity, ion exchangeability and catalytic property.…”

“…Its unique structure and composition make 4A have good thermal stability, absorptivity, ion exchangeability and catalytic property. Recently, various types of molecular sieves have been used alone as flame retardants to achieve a certain flame-retardant effect, or used as synergists to achieve a good synergistic flame-retardant effect [ 30 , 31 , 32 , 33 ]. Thus, 4A could be a promising candidate as a flame-retardant synergist in PP flame retardancy.…”

Improvements in the Water Retention Characteristics and Thermophysical Parameters of Backfill Material in Ground Source Heat Pumps by a Molecular Sieve

“…Molecular sieves with different pore sizes can sieve different particles and the adsorption properties to the surrounding water can be adjusted by choosing different types of molecular sieves. Due to its excellent performance and affordable price, a 3A-MS has been widely used in catalysis, adsorption, ion exchange, and other fields [19][20][21]. However, it has not been used as a water adsorption material in the heat exchange borehole of GSHPs.…”

Construction of Charring-Functional Polyheptanazine towards Improvements in Flame Retardants of Polyurethane

“…Phosphorus can be used in flame retardants and may replace the halogenated variants currently in use [ 12 ]. Research on P-containing flame retardants is increasing due to environmental pollution caused by halogenated flame retardants [ 13 , 14 ]. A variety of halogen-free flame retardants for polymers have been developed, most of which contain P [ 15 , 16 , 17 , 18 ].…”