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

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 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.

Preparation of expandable graphite using a hydrothermal method and flame-retardant properties of its halogen-free flame-retardant HDPE composites

2010 ◽  
Vol 18 (4) ◽  
pp. 483-488 ◽  
Author(s):  
Kuang-Chung Tsai ◽  
Hsu-Chiang Kuan ◽  
Huang-Wen Chou ◽  
Chen-Feng Kuan ◽  
Chia-Hsun Chen ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Hydrothermal Method ◽  
Expandable Graphite ◽  
Flame Retardant Properties ◽  
Halogen Free

scholarly journals Phosphated Avocado Seed: A Renewable Biomaterial for Preparing a Flame Retardant Biofiller

2021 ◽  
Author(s):  
DAVID Zuluaga-Parra ◽  
L.F Ramos-deValle ◽  
Saul Sanchez ◽  
J.R. Torres-Lubián ◽  
J.A. Rodríguez-Gonzalez ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Chemical Modification ◽  
Flame Retardant ◽  
Photoelectron Spectroscopy ◽  
Morphological Changes ◽  
Ethylene Vinyl Acetate ◽  
Chemically Modified ◽  
Air Atmosphere ◽  
Thermal Stability Of ◽  
Avocado Seed

Abstract The cellulose and starch present in the avocado seed can be chemically modified to obtain biofillers with fire retarding characteristics. The resulting composites could be used as substitute of the corresponding halogenated composites. For this, the avocado seed was first washed, dehydrated and pulverized, and thereafter, chemically modified with phosphoric acid in the presence of urea. This was studied using infrared spectroscopy, nuclear magnetic resonance and X-Ray photoelectron spectroscopy, in order to determine the resulting chemical structure and confirm the presence of the proposed functional groups. In addition, scanning electron microscopy and elemental analysis were used, respectively, to establish the resulting morphological changes, as well as the elements present on the surface of the modified material. Thermogravimetric analysis was also carried out in order to establish the thermal stability of the material and predict the effect on the flame retardancy due to the mentioned chemical modification. Further tests established that the obtained modified structure and morphology of the avocado seed was highly dependent on the method used to dehydrate the pulverized avocado seed. It was also determined that chemical modification greatly increased the thermal stability of the avocado seed in air atmosphere. The flame-retardant effect of the modified avocado seed was assessed in polyethylene/ethylene-vinyl-acetate (PE/EVA) composites via cone calorimeter tests. These results showed that the modified avocado seed decreased the peak of the heat release rate (pHRR) by 50% and the total heat released (THR) by 15%. This phosphated avocado seed could be a good option as a renewable biofiller for polymer composites with enhanced flame-retardant properties.

Expandable Graphite For Halogen-Free Flame-Retardant of High-Density Rigid Polyurethane Foams

2005 ◽  
Vol 44 (7) ◽  
pp. 1323-1337 ◽  
Author(s):  
Lei Shi ◽  
Zhong-Ming Li ◽  
Ming-Bo Yang ◽  
Bo Yin ◽  
Qiu-Ming Zhou ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Polyurethane Foams ◽  
High Density ◽  
Expandable Graphite ◽  
Rigid Polyurethane Foams ◽  
Halogen Free
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