2013-05-26T04:59:12Zhttp://www.tdx.cat/oai/request

oai:www.tdx.cat:10803/807162012-07-10T12:15:25Zhdl_10803_335

nam a 5a 4500Poly (vinyl alcohol)Chemical modificationFlame retardant polymersPhosphorous-containing polymersPolymeric additivesSynthesis, characterization and application of polymeric flame retardant additives obtained by chemical modification[Recurs electrònic][Tarragona] :Universitat Rovira i Virgili,DL 2012Accés lliurehttp://www.tdx.cat/handle/10803/80716cr |||||||||||AAMMDDs2012 sp ||||fsm||||0|| 0 eng|cSauca, Silvana1 recurs electrònic (334 p.)Tesi doctoral - Universitat Rovira i Virgili. Departament de Química Analítica i Química Orgànica, 2012Universitat Rovira i Virgili. Departament de Química Analítica i Química OrgànicaTesis i dissertacions electròniquesReina Lozano, José Antonio,dir.TDXDL T.282-2012A key part of the development of new polymeric materials focuses on the use of flame-retardant additives, which help to reduce the inherent flammability of polymers and the production of smoke and toxic gases. The aim of this thesis was the preparation, characterization and application of new polymeric flame-retardant additives, which can lead to intumescent systems when mixed with ¨commodity¨ polymers. The synthesis of this kind of additives was carried out by chemical modification of different polymeric structures (alcohols, polyketones, polyaziridines) with phosphorous moieties, previously described as promoting flame retardance structures, and/or nitrogen containing moieties. The efficacy of some of these additives was tested by blending with polypropylene, one of the most commonly used thermoplastic. Flame retardancy behaviour of the blends, as well their compatibility and mechanical properties were studied, in order to observe how the flame retardant additives may affect the substrate properties.r