Intumescent flame retardants (IFRs) are a new and efficient generation of FRs for polyolefines for some of their peculiarities as very low smoke and toxic gases produced during burning and anti dripping behavior. As widely reported in the literature, their efficiency is enhanced by the simultaneous use of synergistic agents increasing strength and stability of the char layer. In this contribution, 0.5 and 1% by weight of neat or organo-modified sepiolite particles have been included in intumescent polypropylene systems prepared by melt compounding and including two novel commercial IFR additives, herein coded as EX and ET. Capillary rheological measurements show that, especially in presence of surface modified sepiolite, a decrease of the shear viscosity with respect to the reference neat PP is observed all over the examined range of shear rates.
Processability of polypropylene/intumescent flame retardant/sepiolite systems
P Russo;
2015
Abstract
Intumescent flame retardants (IFRs) are a new and efficient generation of FRs for polyolefines for some of their peculiarities as very low smoke and toxic gases produced during burning and anti dripping behavior. As widely reported in the literature, their efficiency is enhanced by the simultaneous use of synergistic agents increasing strength and stability of the char layer. In this contribution, 0.5 and 1% by weight of neat or organo-modified sepiolite particles have been included in intumescent polypropylene systems prepared by melt compounding and including two novel commercial IFR additives, herein coded as EX and ET. Capillary rheological measurements show that, especially in presence of surface modified sepiolite, a decrease of the shear viscosity with respect to the reference neat PP is observed all over the examined range of shear rates.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
