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New silicate‐based powders for fire protection of thermoplastics
Author(s) -
Liu T. M.,
Baker W. E.,
Langille K. B.,
Nguyen D. T.,
Bernt J. O.
Publication year - 1998
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.10051
Subject(s) - cone calorimeter , char , materials science , intumescent , polyvinyl chloride , polymer , composite material , polyethylene , fire retardant , silicate , combustion , flammability , particle size , chemical engineering , organic chemistry , chemistry , engineering
A new, intumescent powdered silicate additive for plastics (polyethylene and polyvinyl chloride) has been investigated that gives improved flame retardancy. Cone calorimeter evaluations of the compounds of polymer/powder show reduction in peak rate of heat release, total heat release, and rate of mass loss. The effects of various polymer/powder ratios and powder particle sizes on the fire protection performance are shown. The morphology of this powder and the polymer/powder compounds before and after combustion is observed. A fire‐protection mechanism is discussed that suggests the importance of an interpenetrating char structure.