Posted on September 30, 2013 by Henri VAHABI
Eurofire Conferences are unique in that they provide a platform for European issues that directly relate to the work of Fire Safety Engineers. The 2013 event focuses on a wide range of topics from Education Certification, Harnessing New Technologies and facilitating Architectural Trends whilst emphasis continues to maintain focus on Application and Cases Studies. After successful events in both Belgium and France this year’s conference will be host in Switzerland. The location is the charming city of Basel on the borders of France and Germany on
9-10th October.
programme
Fire Safety Engineering facilitates safe use and assessment of building projects more efficiently than the Prescriptive Approach traditionally used in regulations. The engineering focus on Performance based indicators leads to better adapted technical building solutions as well as more efficiency on both Cost and Environmental levels….Read more
Like this:
Like Loading...
Filed under: Events | Comments Off on Eurofire Conferences 2013
Posted on September 18, 2013 by Henri VAHABI
This article was published in European Polymer Journal.
Abstract
The focus of this study is an investigation of the effect of oxidation state of phosphorus in phosphorus-based flame retardants on the thermal and flame retardant properties of polyurea and epoxy resin. Three different oxidation states of phosphorus (phosphite, phosphate and phosphine oxide) additives, with different thermal stabilities at a constant phosphorus content (1.5 wt.%) have been utilized. Thermal and flame retardant properties were studied by TGA and cone calorimetry, respectively. The thermal stability of both polymers decreases upon the incorporation of phosphorus flame retardants irrespective of oxidation state and a greater amount of residue was observed in the case of phosphite. Phosphate was found to be better flame retardant in polyurea, whereas phosphite is suitable for epoxy resin. Phosphite will react with epoxy resin by trans-esterification, which is demonstrated by FTIR and 31P NMR. Further, TG–FTIR and XPS studies also provide information on flame retardancy of both polymers with phosphorus flame retardants.
Like this:
Like Loading...
Filed under: Flame Retardant, Magazine, News | Comments Off on Influence of oxidation state of phosphorus on the thermal and flammability of polyurea and epoxy resin
Posted on September 17, 2013 by Henri VAHABI
In response to a recent study released by the National Institute of Environmental Health Sciences(NIEHS) suggesting that certain flame retardants can mimic estrogen, the European Flame Retardant Association (EFRA) issued the following statement:
The crystallographic methodology used in this study, while perhaps offering insight into how estrogen mimicking might occur, provides no evidence that TBBPA, which is known to be quickly metabolized, actually comes in contact with the relevant proteins in the human body. It is unclear why NIEHS chose to use this approach, when the US Environmental Protection Agency has spent many years identifying three tests for estrogenic activity as part of a Congressionally mandated
program for screening substances for potential hormonal activity.
Furthermore, TBBPA went through an 8-year EU Risk Assessment which concluded that TBBPA is safe for use in all its applications and has no significant endocrine potential [1]. This conclusion was also confirmed by the Scientific Committee on Health and Environmental Risks (SCHER). In addition, TBBPA was among the substances examined for its potential role in endocrine disruption as part of an EU project [2] …. Read more:
click hereLike this:
Like Loading...
Filed under: Environment, News | Comments Off on EFRA: In response to a recent study released by the National Institute of Environmental Health Sciences
Posted on September 16, 2013 by Henri VAHABI
Posted on September 14, 2013 by Henri VAHABI
The group “Degradation of organic materials and Fire behavior” of the Chemical Society of France offers a workshop focused on Degradation of fire-retarded polymers in environmental condition in order to :
– give people the basic knowledge in the domains of ageing and fireretardancy
– gather in a two days meeting two different communities with the aim of understanding the impact of environmental ageing of fireretarded polymers on the use properties of the polymeric material
– establish a bond between investigators in the various parts of the fields and to provoke a reflexion on future collaborative programs. The workshop will be organised on the basis of a four half-days meeting. Each session will be devoted to one-two peculiar aspects and will be introduced by general presentations followed by short presentations on recent results.
This workshop could be placed under the auspice of the MoDeSt Society.
Program: click here
Like this:
Like Loading...
Filed under: Events, News | Comments Off on Next event: Workshop-Degradation of fire-retarded polymers in environmental conditions- 24-26 September 2013- Mèze-France
Posted on September 14, 2013 by Henri VAHABI
The group “Degradation of organic materials and Fire behavior” of the Chemical Society of France offers a workshop focused on Degradation of fire-retarded polymers in environmental condition in order to :
– give people the basic knowledge in the domains of ageing and fireretardancy
– gather in a two days meeting two different communities with the aim of understanding the impact of environmental ageing of fireretarded polymers on the use properties of the polymeric material
– establish a bond between investigators in the various parts of the fields and to provoke a reflexion on future collaborative programs. The workshop will be organised on the basis of a four half-days meeting. Each session will be devoted to one-two peculiar aspects and will be introduced by general presentations followed by short presentations on recent results.
This workshop could be placed under the auspice of the MoDeSt Society.
Program: click here
Like this:
Like Loading...
Filed under: Uncategorized | Comments Off on Next event: Workshop-Degradation of fire-retarded polymers in environmental conditions- 24-26 September 2013- Mèze-France
Posted on September 12, 2013 by Henri VAHABI
This article was published in Journal of Materials Chemistry A , Jul 2013.
Abstract:
The flame retardance of glass fiber reinforced polymers is an important worldwide challenge due to the wick effect caused by glass fiber. In this paper, an interfacial flame resistance mode was proposed in order to solve the problem in an efficient and economic manner. Unlike the conventional bulk flame resistance mode based on a high loading of flame retardants distributed evenly throughout the entire composite matrix, the interfacial flame resistance mode concentrates only a very low content of flame retardants located in the glass fiber–polymer interfacial regions, where the wicking action occurs, grafted on the glass fiber surface. According to this new mode, glass fiber reinforced and flame retarded polyamide 6 was prepared and evaluated. At the combustion temperature, the interaction between the polymer (polyamide 6) and the grafted flame retardant quickly produced inert and rough interfacial chars replacing the original smooth and high-energy surface of the glass fiber. The interfacial char layer could effectively block the adsorption, wetting, spread and flow of the polymer melt on the glass fiber surface, therefore, greatly weakening both the thermodynamic and dynamic processes that induce the wicking action. In addition, the formation of organic side chains on the glass fiber surface by the graft reaction also contributed to an improvement in the interfacial compatibility, favoring enhanced mechanical properties of the composites. The interfacial flame resistance mode provided a novel means for preparing advanced flame retardant glass fiber reinforced polymers.
Like this:
Like Loading...
Filed under: Magazine | Comments Off on An efficient interfacial flame-resistance mode to prepare glass fiber reinforced and flame retarded PA6
Posted on September 8, 2013 by Henri VAHABI
New article published in Australian Journal of Basic and Applied Sciences.
Abstract:
A world towards the concept of sustainable development and environment with low greenhouse gas emissions, zero waste and low energy consumption is an important endeavor. Geopolymer is an aluminosilicate materials occurred by dissolve it in highly alkaline solution then transform into tridimensional tecto-aluminosilicate materials. As an inorganic material, geopolymer has a potential in fire resistant and protective coating for different surfaces including metal and concrete due to their superior mechanical, chemical and thermal resistance properties. With an additional engineering design, in curing and sintering temperature, Si:Al ratio as well as additives used will improve the geopolymer coating properties. The present paper outlines br
iefly the potential ofgeopolymer as a coating material to bring the world towards a better future with a reduced carbon footprint.
Like this:
Like Loading...
Filed under: Uncategorized | Comments Off on Review on Current Geopolymer as a Coating Material
Posted on September 3, 2013 by Henri VAHABI
A new article published in Progress in Organic Coatings
Abstract
This paper reviews the recent developments (last decade) in flame retardant polymeric coatings that mostly work by formation of conventional char (condensed phase) and or radical species in gas phase. Advancements in the method of application of such coatings on various substrates, problems of existing flame retardant coatings and new technological developments in terms of flame retardant chemistry are briefly discussed. This review focuses on various approaches in development of flame retardant coatings on various substrates i.e. incorporation of reactive and non-reactive organic compounds and organic/inorganic compounds (hybrid systems) based on metal, Si, P, N and halogens in suitable polymeric matrices and evaluation of their flame retardant characteristics using various analytical techniques.
Like this:
Like Loading...
Filed under: Magazine | Comments Off on Recent developments in flame retardant polymeric coatings
Flame retardancy of polymers 