Abstract
AbstractA Response Surface Methodology (RSM) approach was used in performing a D‐Optimal mixture design of experiments of injection moldable fire retarded High Impact Polystyrene (FR‐HIPS) formulated with blends of Chlorez 700 SSNP (chlorinated paraffin wax) and FR‐1808 (octabromotrimethylphenyl indane, a non diphenyl oxide, brominated flame retardant that is considered more environmentally acceptable than decabromo diphenyl oxide flame retardant) in synergistic combination with antimony trioxide/zinc sulfide (white pigment) blends. An optimum processing region was identified from the viewpoint of product performance (burn time to meet UL‐94 V‐O @ 1.6 mm specification without affecting significantly other attractive physical properties) and economics that is dictated by the price of FR additives. This study has demonstrated that use of DOE offers an important benefit in formulation development and that a large number of factors can be evaluated in a relatively small number of experimental runs.
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