• Elastomers and Composites
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• v.52 no.2
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• pp.105-113
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• 2017

The curing behavior, mechanical properties, hot-air aging resistance, abrasion properties,thermal properties, etc., of EVM/EPM/APP (ammonium polyphosphate)/DPER (dipentaerythritol)/EG (expandable graphite) and EVM/EPM/ATH (aluminium trihydroxide) flame retarding systems in ethylene vinyl acetate rubber (EVM) blends with EPM (ethylene propylene rubber) were sequentially examined. For both flame retarding systems, the torque values increased with the content of EPM rubber and with the vulcanization time. As the content of EPM rubber increased, the scorch time became shorter, whereas the optimum cure time followed an increasing trend. For the EVM/EPM/APP/DPER/EG flameretarding system, as the content of EPM rubber increased, the hardness did not change,whereas the tensile strength and elongation at break decreased. A hot-air aging resistance test at $150^{\circ}C$ showed that the heat resistance decreased with the EPM content regardless of the kinds and contents of flame retardants. As the EPM content increased, the abrasion rate became higher and the abrasion resistance of the EVM/EPM/APP/DPER/EG flame retarding systems exceeded that of the EVM/EPM/ATH flame retarding counterparts. In comparison with the EVM/EPM/ATH flame retarding systems, the thermal stability of the EVM/EPM/APP/DPER/EG flame retarding system showed an increasing tendency.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2004.11a
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• pp.57-63
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• 2004

• Journal of the Korea Furniture Society
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• v.27 no.2
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• pp.137-144
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• 2016

Wood plastic composite (WPC) is a green composite made of wood flour and thermoplastics to provide better performance by removing the defects of both wood and plastics. However, relatively low thermal stability and poor fire resistance of wood and plastics included in WPC have been still issues in using WPC as a building material for interior applications. This study investigated the effect of environmentally-friendly flame retardants (EFFRs) on the mechanical, thermal, morphological, and water absorption properties of wood flour (WF)/talc/polypropylene (PP) composites in comparison with neat PP. The whole EFFRs-filled WF/talc/PP composites showed higher values in flexural strength, flexural modulus, and impact strength compared to neat PP. In thermal properties, aluminum hydroxide (AH)-filled composite showed a $36^{\circ}C$ reduction in maximum thermal decomposition temperature ($T_{max}$) compared to neat PP, but magnesium hydroxide (MH) played an important role in improving thermal stability of filled composite by showing the highest $T_{max}$. From this research, it can be said that MH has potentials in reinforcing PP-based WPCs with improvement of thermal stability.

• Polymer(Korea)
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• v.31 no.4
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• pp.273-277
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• 2007

Cyclophosphazene derivatives were synthesized in order to use as a non-halogen flame retardant for ABS. Chlorocyclophosphazene was reacted with phenol, catechol, aniline, 1,2-diaminobenzene respectively, and each product was characterized by UL94 and LOI test for ABS resin. The physical properties of the sample containing these flame retardants were also characterized. The derivative synthesized from catechol showed best flame retardancy, and the derivative from phenol exhibited the flame retardancy in which the synergic effect was shown with novolac.

• Nuclear Engineering and Technology
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• v.13 no.4
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• pp.245-253
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• 1981

The properties of polyethylene materials exhibit good insulation and radiation resistance, but exhibit poor flame resistance. Flame retardant properties of the polyethylene were improved by the radiation induced grafting or crosslinking. When the various flame retardants were fixed onto polyethylene, the amount of fixation in grafting was increased with the increase of radiation dosages. In the case of grafting, it is necessary for high grafting yield that the polyethylene films were swelled before irradiation with ${\gamma}$-rays or electron beams. It is the suitable method for the fixation of flame retardant that polyethylene samples were blended with various flame retardants at 1$25^{\circ}C$ and then blended polymers were crosslinked by the electron beams at room temperature.

• Polymer(Korea)
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• v.27 no.6
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• pp.569-575
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• 2003

The flame retardancy was investigated when the halogenated flame retardant, decabromodiphenyl oxide (DBDPO) and chlorinated paraffin wax (CPW), was added to the polypropylene (PP) / montmorillonite (MMT) nanocomposites. The flame retardancy of polymer resin could be improved not only by addition of flame retardant but also with nanoparticles compositions. The effect of the contents of flame retardant and nanoparticles on the flame retardancy of polypropylene/ montmorillonite nanocomposite systems was thoroughly examined in terms of limited oxygen index (LOI) and cone calorimetry. As a results of cone calorimetry, the heat release rate (HRR) was reduced by the flame retardant DBDPO and CPW, and CPW was a little better than DBDPO. The LOI increased from flammable region (LOI<19) to nonflammable region (LOI>20) for all the flame retardants used in this study. Especially, the improvement in flame retardancy by compounding with PP and MMT was better than that by adding flame retardant to polypropylene. So, the addition of flame retardant after compounding with montmorillonite was more efficient than simple addition of flame retardant.

• Korean Chemical Engineering Research
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• v.52 no.2
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• pp.187-190
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• 2014

Four excellent halogen-free biphosphonate flame retardants (EBDMP, EBDEP, MBDMP, MBDEP) were synthesized through polycondensation and Arbuzov rearrangement reactions without using any solvents. The products were characterized by ESI-MS, FT-IR and $^1H$ NMR. The application of EBDEP in polyurethane soft foam was studied and the results illustrated its excellent flame-proofing properties.

• Journal of the Korean Wood Science and Technology
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• v.42 no.4
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• pp.477-482
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• 2014

Consumer demand for wood use has diversified recently. Laminated wood has been used for large-scale buildings and public buildings, not only the durability but also the demand for fire safety has increased. In this study. it was performed for the purpose of developing a standard and flame-retardant treatment technology suitable for structural laminated wood, which was prepared in domestic larch. In this study, by using the domestic larch and Korean pine lumber which treated with flame-retardants, to manufacture the glulam, the effect of strength properties were investigated. In the case of fire retardant treated larch Glulam was satisfactory conditions of the strength of structural laminated wood, but had to be improved, such as the occurrence of delamination and decrease strength by the flame retardant treatment. Development of application-type flame retardant treatment technology or injection-type flame retardant treatment after production of laminated lumber were required.

• Journal of the Korean Institute of Gas
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• v.17 no.1
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• pp.35-41
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• 2013

In this study, flame retardancy of polyurethane foam and phenolic foam were investigated by addition of phosphorous flame retardants. The thermal degradation behavior of polyurethane foam and phenolic foam in the presence of flame retardants has been studied by thermogravimetric analysis(TGA). Heat release rate(HRR), mean HRR, mass loss rate(MLR), total smoke released(TSR) and limited oxygen index(LOI) were tested by cone calorimeter. From the test results, Phenolic foam showed low HRR, MLR and TSR than polyurethane foam.

• Proceedings of the Korea Contents Association Conference
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• 2014.06a
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• pp.219-220
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• 2014