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Improvements on Flame Retardant Properties of PET/Montmorillonite Nanocomposite Caused by Polyborosiloxane

Published online by Cambridge University Press:  17 March 2011

Yue Huo ,
Qinguo Fan ,
Nicholas A Dembsey  and
Prabir K Patra
Yue Huo
Affiliation:
Materials and Textiles, University of Massachusetts Dartmouth, 285 Old Westport Road, North Dartmouth, MA, 02747
Qinguo Fan
Affiliation:
Materials and Textiles, University of Massachusetts Dartmouth, 285 Old Westport Road, North Dartmouth, MA, 02747
Nicholas A Dembsey
Affiliation:
Fire Protection Engineering, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA, 01609-2280
Prabir K Patra
Affiliation:
Materials and Textiles, University of Massachusetts Dartmouth, 285 Old Westport Road, North Dartmouth, MA, 02747
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Abstract

A phenyl-containing highly cross linked polyborosiloxane (PBSiO) was synthesized as a flame retardant for polyethylene terephthalate (PET). We coated montmorillonite (MMT) clay, a very high aspect ratio and high specific surface area layered silicate with synthesized PBSiO to introduce synergism in flame retardation to the PET nanocomposite film that retained thermal and mechanical properties. This PBSiO has high thermal stability at the processing temperature (270-285° C) of PET and acts as a compatibilizer between PET and clay that are otherwise incompatible. During burning, the flame retardant PET containing PBSiO and MMT forms a protective borosilicatecarbonaceous intumescent char on the surface. Cone calorimeter tests were performed to evaluate key fire properties of the PET/PBSiO/MMT. The peak heat release rate (PHRR) of PET that contains 5 wt% PBSiO and 2.5 wt% MMT was reduced by 60% and similar trend in the reduction of mass loss rate of the nanocomposite was observed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1007: Symposium S – Organic/Inorganic Hybrid Materials-2007 , 2007 , 1007-S12-33
Copyright
Copyright © Materials Research Society 2007

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