Tensile properties and fire residue morphology of flame-retarded-polypropylene composites

Liang, Ji‐Zhao

doi:10.1177/0892705720925127

Cited by 5 publications

(2 citation statements)

References 30 publications

(68 reference statements)

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“…This observation suggests that the incorporation of Ti 4 O 7 not only hinders the premature decomposition of the silicone rubber but also reduces its rate of mass loss. 25,26 An intriguing phenomenon is noted: while the thermal decomposition of pure silicone rubber exhibits a single decomposition phase, the addition of Ti 4 O 7 introduces two decomposition phases, particularly in the temperature range of 660-690°C, where a distinctive peak of thermal weight loss emerges. 27 This phenomenon is likely attributed to the presence of Ti 4 O 7 , which exhibits the capacity to absorb a substantial amount of gases released during the fracture of silicone rubber molecular chains, particularly in the intermediate and later phases of decomposition.…”

Section: Thermal Properties Of Sr and Its Compositesmentioning

confidence: 99%

A novel application of titanium suboxide to enhance the flame retardancy, thermal stability, and thermal and electrical conductivity of silicone rubber

Feng,

Xu,

Liu

et al. 2023

Journal of Thermoplastic Composite Materials

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This study investigates the impact of Titanium Suboxide (Ti4O7) on the flame retardancy, mechanical properties, thermal stability, and electrical and thermal conductivity of silicone rubber composites. The addition of 1.0 part of Ti4O7 to the silicone rubber composites results in a total heat release (THR) of 45 MJ/m2, which is 45.7% lower than the silicone rubber without Ti4O7, leading to a decrease in the peak of heat release rate (PHRR). Furthermore, Ti4O7 exhibits temperature stability at low temperatures and acts as a physical barrier, inhibiting the early decomposition of silicone rubber and enhancing the thermal stability of the composites. However, at temperatures exceeding 450°C, the catalytic activity of Ti4O7 is activated, promoting the decomposition of the silicone rubber composites and generating more residue. The addition of an appropriate amount of Ti4O7 can further improve the mechanical properties of the silicone rubber composites and enhance their electrical and thermal conductivity.

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Section: Thermal Properties Of Sr and Its Compositesmentioning

confidence: 99%

A novel application of titanium suboxide to enhance the flame retardancy, thermal stability, and thermal and electrical conductivity of silicone rubber

Feng,

Xu,

Liu

et al. 2023

Journal of Thermoplastic Composite Materials

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“…Adding flame retardants to WPCs during processing is the primary method to enhance the fire-safety performance of WPCs. Among the flame retardants, the use of halogen flame retardants has been banned because of their harmful effects to the environment and the release of toxic gases during combustion. − Although the high contents of inorganic flame retardants, such as Al(OH) 3 and Mg(OH) 2 , enhance the flame retardancy, they usually affect the mechanical properties of WPCs adversely. − For comparison, phosphorus-containing flame retardants have excellent flame-retardant properties. Ammonium polyphosphate (APP), as a commercial flame retardant, has excellent effects when it is combined with synergists, such as expanded graphite, layered double hydroxide, new triazine polymers, and nano-silicon dioxide .…”

Section: Introductionmentioning

confidence: 99%

Bio-Based Flame-Retardant and Smoke-Suppressing Wood Plastic Composites Enabled by Phytic Acid Tyramine Salt

Leng

Zhao

et al. 2022

ACS Sustainable Chem. Eng.

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Using bio-based chemicals and recycling waste plastics are essential components of the circular economy. Wood−plastic composites (WPCs), fabricated from recycled plastic and wood-processing wastes, are new, green, and environmentally friendly materials. However, their flammability causes potential fire risks and hazards. Although bio-based flame retardants possess the essential advantage over inorganic or petroleum-based chemicals, their application, particularly that of fully bio-based flame retardants, in WPC has been seldom reported. Herein, we designed and synthesized a fully bio-based flame retardant, phytic acid-tyramine salt (referred to as PATA), using a green and environmentally friendly approach with only deionized water as the reaction solvent. PATA is subsequently utilized in conjunction with ammonium polyphosphate (APP) to synergistically impart flame-retardant properties to WPCs. PATA/APP shows a good flame-retardant effect, improving the flame retardant and smoke suppression properties of WPCs. The PATA/APP system can increase the limiting oxygen index by 31% and achieve a vertical combustion V-0 rating. Furthermore, the PATA/APP system can reduce the peak heat release rate, total heat release, and maximum smoke density by 49, 22, and 15%, respectively. The PATA/APP system can generate phosphoric acid substances during combustion, which promote the decomposition of wood flour to form stable char layers containing P−N−C or P−O−C structures. Consequently, we provide an environmental-friendly approach to enhance the flame retardancy of WPCs.

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Improvement of flame retardancy and thermal stability of highly loaded low density polyethylene/magnesium hydroxide composites

Yücesoy,

Balçik Tamer,

Berber

2023

J of Applied Polymer Sci

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This study aims to enhance the flame retardant efficiency and thermal stability of low density polyethylene (LDPE) by using halogen‐free inorganic additives. To prepare the highly loaded flame retardant polymer composites, LDPE melt mixes with magnesium hydroxide and magnesium carbonate at different weight ratios using a twin‐screw extruder. The composites are characterized by thermogravimetric analysis, crystallinity degree, tensile strength, morphological analysis, limiting oxygen index and UL‐94 vertical burning test. An optimum MH/MC weight ratio of 60/40 provides satisfactory composite properties with increased maximum thermal degradation temperature from 472.3 to 483.5°C, the highest LOI value of 32.5% and a UL‐94 V‐0 rating without melt dripping. The homogeneity of this composite is improved by using a polymeric compatibilizer, MAH‐g‐PE and an enhancement in tensile strength, elongation at break and elastic modulus values of 33.68%, 33.02% and 23.55%, respectively, are obtained. In order to create synergism between the flame retardant additives, 1, 3 and 5 wt% zinc borate is added to the composite system. The incorporation of 5 wt% ZB causes a significant delay in the thermal decomposition of MH with an improvement of 51.8°C in maximum degradation temperature. This composite also exhibits a satisfactory flame retardant grade with a UL‐94 V‐0 rating.

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Tensile properties and fire residue morphology of flame-retarded-polypropylene composites

Cited by 5 publications

References 30 publications

A novel application of titanium suboxide to enhance the flame retardancy, thermal stability, and thermal and electrical conductivity of silicone rubber

A novel application of titanium suboxide to enhance the flame retardancy, thermal stability, and thermal and electrical conductivity of silicone rubber

Bio-Based Flame-Retardant and Smoke-Suppressing Wood Plastic Composites Enabled by Phytic Acid Tyramine Salt

Improvement of flame retardancy and thermal stability of highly loaded low density polyethylene/magnesium hydroxide composites

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