Synergistic effects of 4A zeolite on the flame retardant properties and thermal stability of a novel halogen-free PP/IFR composite

2013 ◽  
Vol 24 (5) ◽  
pp. 478-486 ◽  
Author(s):  
Caimin Feng ◽  
Yi Zhang ◽  
Siwei Liu ◽  
Zhenguo Chi ◽  
Jiarui Xu
Keyword(s):  
Thermal Stability ◽  
Flame Retardant ◽  
Synergistic Effects ◽  
4A Zeolite ◽  
Flame Retardant Properties ◽  
Halogen Free ◽  
Thermal Stability Of

Synthesis of a Novel Halogen-Free Intumescent Flame Retardant Agent

2014 ◽  
Vol 1004-1005 ◽  
pp. 1017-1021
Author(s):  
Wang Wang Yu ◽  
Tao Huang ◽  
Wen Lei
Keyword(s):  
Thermal Stability ◽  
Fourier Transform ◽  
Flame Retardant ◽  
Raw Materials ◽  
Intumescent Flame Retardant ◽  
Char Yield ◽  
Yield Performance ◽  
Flame Retardant Properties ◽  
Halogen Free ◽  
Thermal Stability Of

A novel non-halogen intumescent flame retardant agent (IFR) was prepared by using phosphoric acid, pentaerythritol and aniline as raw materials. The structure and thermal stability of IFR were investigated by means of Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The flame retardant properties of IFR were investigated based on its inflation and char yield performance at 500°C. The results show that both the reaction time and mole ratio of raw materials have effects on the inflation and char yield of IFR.

scholarly journals THE THERMAL STABILITY OF POLYMER CABLE COMPOUNDS WITH A FLAME-RETARDING FILLER

2018 ◽  
Vol 13 (6) ◽  
pp. 35-41
Author(s):  
A. Yu. Svatikov ◽  
I. D. Simonov-Emelyanov
Keyword(s):  
Thermal Stability ◽  
Flame Retardant ◽  
Magnesium Hydroxide ◽  
Fire Safety ◽  
Polymeric Materials ◽  
Crystalline Hydrate ◽  
Pressure Casting ◽  
Volatile Products ◽  
Halogen Free ◽  
Thermal Stability Of

Currently, halogen-free cable compositions are becoming increasingly common in the manufacture of cable compositions. The concept of halogen-free or “zero halogen” becomes a symbol of fire resistance, low-smoke characteristics, low toxicity of volatile products of combustion, the absence of the toxic, corrosive and irritating gas - hydrogen chloride - and other hydrogen halides in the volatile products. More and more manufacturers of cable products are beginning to pay increasing attention to the problems of processing, toxicity and fire safety. It should be noted that the requirements for improving the fire safety of cable products are constantly becoming tougher, since the main problem of most of these polymeric materials is their flammability, high smoke generation and high flame spread rate. In this regard, there is a burning question to increase these characteristics and bring them to the level of compounds based on PVC. The main way to increase the flame-retardant characteristics of halogenfree cable compositions is to introduce mineral fire retardants into these compositions. The study of the composition and packaging of these mineral fillers-flame retardants makes it possible to increase the level of flame-retardant characteristics of halogen-free cable compositions. The paper presents the results of studies on the thermal stability of cable compositions based on PE + EVA mixtures containing magnesium hydroxide crystalline hydrate as a filler-flame retardant. It is shown that cable compositions containing magnesium hydroxide crystal hydrate are characterized by higher heat resistance and thermal stability (~ 2-fold) compared to a polymeric matrix based on PE + SEVA. This allows to process them at high temperatures (more than 200°C) by extrusion and pressure casting.

Synthesis and Flame Retardant Properties of Melamine Modified EH Lignin

2011 ◽  
Vol 236-238 ◽  
pp. 482-485 ◽  
Author(s):  
Ru Lin Fu ◽  
Xian Su Cheng
Keyword(s):  
Thermal Stability ◽  
Enzymatic Hydrolysis ◽  
Flame Retardant ◽  
Flame Retardancy ◽  
Hydrolysis Lignin ◽  
Char Residue ◽  
Red Phosphorus ◽  
Environmental Friendly ◽  
Flame Retardant Properties ◽  
Thermal Stability Of

A novel intumescent flame retardant (IFR), melamine modified enzymatic hydrolysis lignin (MEHL), was synthesized and well characterized by FTIR and TGA. The results showed that the decompose temperature of MEHL is much higher than that of enzymatic hydrolysis lignin (EHL). In order to improve flame retardancy and dripping resistance of EPDM, MEHL and microencapsulated red phosphorus (MRP) were added into EPDM as IFR system. The flame ability and thermal stability of IFR and EPDM composites were investigated by UL-94 vertical burning test and LOI measurements. The results indicated that FV-0 was reached and the LOI value was 35 when per hundred rubber (phr) together with 12 phr MRP and 50 phr EHLM were added. SEM photos showed that the char residue was continuous, and a barrier between flame and rubber was formed, while there were also small holes in its surfaces. On all accounts, EHL used as a carbonization agent instead of petroleum chemicals, such as pentaerythritol, was more environmental friendly and beneficial to economy.

scholarly journals Investigation of the Flammability and Thermal Stability of Halogen-Free Intumescent System in Biopolymer Composites Containing Biobased Carbonization Agent and Mechanism of Their Char Formation

Polymers ◽  
2018 ◽  
Vol 11 (1) ◽  
pp. 48 ◽  
Author(s):  
Muhammad Maqsood ◽  
Gunnar Seide
Keyword(s):  
Flame Retardant ◽  
Cone Calorimetry ◽  
Limiting Oxygen Index ◽  
Melt Compounding ◽  
Char Formation ◽  
Peak Heat Release Rate ◽  
Flame Retardant Properties ◽  
Halogen Free ◽  
Intumescent System ◽  
Thermal Stability Of

Starch, being a polyhydric compound with its natural charring ability, is an ideal candidate to serve as a carbonization agent in an intumescent system. This charring ability of starch, if accompanied by an acidic source, can generate an effective intumescent flame retardant (IFR) system, but the performance of starch-based composites in an IFR system has not been tested in detail. Here, we describe a PLA-based IFR system consisting of ammonium polyphosphate (APP) as acidic source and cornstarch as carbon source. We prepared different formulations by melt compounding followed by molding into sheets by hot pressing. The thermal behavior and surface morphology of the composites was investigated by thermogravimetric analysis and scanning electron microscopy respectively. We also conducted limiting oxygen index (LOI), UL-94, and cone calorimetry tests to characterize the flame-retardant properties. Cone calorimetry revealed a 66% reduction in the peak heat release rate of the IFR composites compared to pure PLA and indicated the development of an intumescent structure by leaving a residual mass of 43% relative to the initial mass of the sample. A mechanism of char formation has also been discussed in detail.

Preparation, thermal stability and flame-retardant properties of halogen-free polypropylene composites

2012 ◽  
Vol 24 (6) ◽  
pp. 478-487 ◽  
Author(s):  
Yi-Luen Li ◽  
Chen-Feng Kuan ◽  
Shu-Wei Hsu ◽  
Chia-Hsun Chen ◽  
Hsu-Chiang Kuan ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Flame Retardant ◽  
Polypropylene Composites ◽  
Flame Retardant Properties ◽  
Halogen Free

Preparation, characterization, and thermal stability of novel PMMA/expandable graphite halogen-free flame retardant composites

2009 ◽  
pp. NA-NA ◽  
Author(s):  
Chia-Hsun Chen ◽  
Wei-Hsin Yen ◽  
Hsu-Chiang Kuan ◽  
Chen-Feng Kuan ◽  
Chin-Lung Chiang
Keyword(s):  
Thermal Stability ◽  
Flame Retardant ◽  
Expandable Graphite ◽  
Halogen Free ◽  
Thermal Stability Of
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