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degradation of polymeric brominated flame retardants

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degradation of polymeric brominated flame retardants

The SPARC software program was used to estimate the acid-catalyzed, neutral, and base-catalyzed hydrolysis rate constants for the polymeric brominated flame retardants BC-58 and FR-1025, as well ...


2019-1-9 · “Degradation of the Polymeric Brominated Flame Retardant “Polymeric FR” by Heat and UV Exposure” Environmental Science & Technology. To reduce the risk of fire, many everyday products –– from building materials to furniture to clothing –– contain flame retardants.


2011-3-18 · Abstract. In this chapter, an overview of the degradation processes of brominated flame retardants is presented, including both chemical and biological processes. BFRs could be affected by different types of reactions, being the photochemical reactions the most widely studied and reported. Also, among the different BFR families, PBDEs, and in ...


2012-10-29 · Brominated flame retardants built with long polymeric backbones can provide the flame-retarding benefits of bromine and decrease the possibility of toxicological side effects, they say.


To reduce the propensity for migration from the polymer matrix, oligomeric flame retardants containing brominated units have been developed [23, 24]. These materials can function as effective flame retardants both in the presence and in the absence of an antimony oxide promoter.


Abiotic degradation of the brominated polymeric flame retardant “Polymeric FR” and ecotoxicity of generated decomposition products Inaugural-Dissertation zur Erlangung des Doktorgrades Dr. rer. nat. Der Fakultät für Biologie an der Universität Duisburg-Essen vorgelegt von …


It has been shown to degrade under specific circumstances (following UV and heat exposure). Detected degradation products cause almost no acute toxicity, whereas chronic toxicity might be relevant. Nevertheless, as long as polymeric flame retardants are only used in building insulation, the actual risk seems to be rather limited.


2019-4-25 · A new paper by Koch et al. entitled “Degradation of brominated polymeric flame retardants and effects of generated decomposition products” has recently been published in the journal Chemosphere. The same authors published earlier this year two papers on the same subject . This paper provides a summary of the state on knowledge on the Polymeric FR and the author’s previous work …


Degradation of Polymeric Brominated Flame Retardants: Development of an Analytical Approach Using PolyFR and UV Irradiation By Christoph Koch (512197), Alexander Dundua (3342197), Jackelyn Aragon-Gomez (3342194), Milen Nachev (522022), Susanne Stephan (3342200), Sarah Willach (3342191), Mathias Ulbricht (1462267), Oliver J. Schmitz (3342203 ...


Brominated flame retardants built with long polymeric backbones can provide the flame-retarding benefits of bromine and decrease the possibility of toxicological side effects, they say.


2017-1-1 · Brominated polymeric flame retardants (FR) have been developed that can provide effective flame retardant performance in polymer systems that previously relied on hexabromocyclododecane (HBCD). This polymeric FR material exhibits a superior environmental profile to that of HBCD and other lower molecular weight FR molecules.


Degradation of brominated polymeric flame retardants and effects of generateddecomposition products. Koch C(1), Sures B(2). Author information: (1)Aquatic Ecology and Centre for Water and Environmental Research (ZWU), University Duisburg-Essen, 45141, Essen, Germany; Deutsche Rockwool GmbH & Co. KG, 45966, Gladbeck, Germany.


Addition to ``Degradation of the Polymeric Brominated Flame Retardant `Polymeric FR' by Heat and UV Exposure''


TG-MS investigation of brominated products from the degradation of brominated flame retardants in high-impact polystyrene. Grause G(1), Karakita D, Ishibashi J, Kameda T, Bhaskar T, Yoshioka T. Author information: (1)Graduate School of Environmental Studies, Tohoku University, Aramaki Aza Aoba 6-6-11, Aoba-ku Sendai 980-8579, Japan. [email protected] ...


2019-3-11 · taken into account. These factors may lead to a degradation of the commercial polymer and could result in smaller molecules with a different toxic potential. An environmental factor that is well known for altering the structure of brominated flame retardants (BFR) is …


2016-11-3 · Many well-established methods for studying the degradation of brominated flame retardants are not useful when working with polymeric and water insoluble species. An example for this specific class of flame retardants is PolyFR (polymeric flame retardant; CAS No 1195978–93–8), which is used as a substituent for hexabromocyclododecane.


2019-4-25 · New Study Demonstrates Safe Use of Brominated Polymeric Flame Retardant. BSEF Press Statement – 25 April 2019. A new paper by Koch et al. entitled “Degradation of brominated polymeric flame retardants and effects of generated …


2019-1-9 · Monomeric brominated flame retardants often pose risks to the environment. The new group of polymeric flame retardants is claimed to be a safer alternative due to their high molecular weight and ...


2016-11-11 · Abstract. Many well-established methods for studying the degradation of brominated flame retardants are not useful when working with polymeric and water insoluble species. An example for this specific class of flame retardants is PolyFR (polymeric flame retardant; CAS No 1195978-93-8), which is used as a substituent for hexabromocyclododecane.


2019-7-1 · Accordingly, the polymeric substance was at least partly degraded which leads to several smaller molecules. Degradation of “Polymeric FR” can also be observed via abstraction of bromine, which was suggested based on 1 H NMR measurements (Koch et al., 2016).


2012-10-29 · Brominated flame retardants built with long polymeric backbones can provide the flame-retarding benefits of bromine and decrease the possibility of toxicological side effects, they say. With molecular weights more than 1,000 daltons or so, the polymeric …


Degradation of brominated polymeric flame retardants and effects of generated decomposition products


2016-11-11 · Many well-established methods for studying the degradation of brominated flame retardants are not useful when working with polymeric and water insoluble species. An example for this specific class of flame retardants is PolyFR (polymeric flame retardant; CAS No 1195978–93–8), which is used as a substituent for hexabromocyclododecane.


2016-11-11 · Many well-established methods for studying the degradation of brominated flame retardants are not useful when working with polymeric and water insoluble species. An example for this specific class of flame retardants is PolyFR (polymeric flame retardant; CAS No 1195978-93-8), which is used as a substituent for hexabromocyclododecane.


History has shown that brominated flame retardants often pose risks to the environment. However, the new group of polymeric brominated flame retardants might be a safer alternative compared to previously used monomers due to their high molecular weight. An example for this new group is "Polymeric FR …


2019-5-21 · BS Flame Retardants T Reilly, A Beard 30-Sep-2009 Additives used in Flame Retardant Polymer ... UV Stabilizers: interfere with light-induced degradation, weathering ... findings of certain brominated flame retardants in the environment, biota, humans ...


2017-3-13 · Brominated flame retardants (BFRs) are bromine-bearing hydrocarbons added or applied to ... degradation of BFRs produces potent precursors to polybrominated dibenzo-p-dioxins and ... underlying mechanisms, decomposition products, the influence of the polymeric matrix, metallic content and operational conditions.


2006-3-19 · Title: On the combustion and photolytic degradation products of some brominated flame retardants Author: Gunilla Söderström, Department of Chemistry, Environmental Chemistry, University of Umeå, SE-901 87 Umeå, Sweden Abstract Many modern products, especially electronic goods, are protected by brominated flame retardants (BFR).


Brominated flame retardants (BFRs) are bromine-bearing hydrocarbons added or applied to materials to increase their fire resistance. As thermal treatment or recycling activities are common disposal methods for BFR-laden objects, it is essential to determine the precise decomposition chemistry of BFRs at elevated temperatures, and their transformation pathways into hazardous pollutants.


Degradation of brominated polymeric flame retardants and effects of generated decomposition products. Brominated flame retardants are often associated with adverse environmental effects. Nevertheless, these chemicals are required in order to comply with fire safety standards. Therefore, a better environmental profile is desirable.


The new group of polymeric flame retardants is claimed to be a safer alternative due to their high molecular weight and persistence by design. Within this publication, the degradation of a commercially widely applied example of this group-the polymer "Polymeric FR"-was studied during UV irradiation and long-term exposure to heat (60 °C) for up to 36 weeks.


2019-1-9 · Degradation of the Polymeric Brominated Flame Retardant “Polymeric FR” by Heat and UV Exposure. Environmental Science & Technology , 2019; DOI: 10.1021/acs.est.8b03872 Cite This Page :


2020-6-17 · Lower % by mass of flame retardant 4 4 4 4 Primary benefits of brominated flame-retardants in foam insulation: The new brominated polymer flame retardant is based on a co-polymer of styrene and butadiene where the polybutadiene portion is brominated on to the 1,2 and 1,4 isomer units to give a brominated polybutadiene.


2021-4-15 · Photolytic Degradation Products of Two Highly Brominated Flame Retardants Cause Cytotoxicity and mRNA Expression Alterations in Chicken Embryonic Hepatocytes Guanyong Su,†,‡ Robert J. Letcher,*,†,‡ Doug Crump,† Reza Farmahin,†,§ John P. Giesy,∥,⊥,# and Sean W. Kennedy†,§


2007-8-22 · PHOTOLYTIC DEGRADATION OF BROMINATED FLAME RETARDANTS IN THE ENVIRONMENT Bradnado B. Turnquest1, Xiaojun Niu2, and Yadong Li1 1Department of Civil and Environmental Engineering, Jackson State University, Jackson, MS 39217-0168, USA 2School of Environmental Science and Engineering, South China University of Technology,


2020-12-1 · A new paper by Koch et al. entitled “Degradation of brominated polymeric flame retardants and effects of generated decomposition products”[1] has recently been published in the journal Chemosphere. The same authors published earlier this year two papers on the same subject[2][3].


Monomeric brominated flame retardants often pose risks to the environment. The new group of polymeric flame retardants is claimed to be a safer alternative due to their high molecular weight and persistence by design. Within this publication, the degradation of a commercially widely applied example of this group-the polymer "Polymeric FR"-was studied during UV irradiation and long-term ...


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