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Questra - PS - The Dow Chemical Company
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... shrinkage. Compared to the standard material PS143 E, in injection moulding PS 145 D makes more favourable cycle times possible and at the same time it is well suited for the production of colour master batches. The syndiotactic polystyrene Questra, according to its characteristics profile an engineering plastic, was taken off the market by Dow in the beginning of 2005 since its serviceability could not be extended from niche segments to large market segments. Where polystyrene is used classica...
Kunststoffe international, 2005-11-21, Morphology and Mechanical Properties: Blends of Polyamide 66 and Syndiotactic Polystyrene
...e modifier can influence the morphology and hence the properties of (sPS+sPS-g-MSA+PA 66) blends, the mixing ratios set out in Table 1 were employed to compound blends. Use was made here of a PA 66 of type Zytel EFE 1032 from DuPont, an sPS of type Questra CP QA 101 natural, produced by Dow, and a modifier of type Scona TPSPS 8012 PA, produced by Kometra. All the blends had 0.2% Irganox B 215 from Ciba Specialty Chemicals added to them as a stabiliser. When blends of this type are compounded, th...
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