Polymerisation Processes Polymerisation Processes Polyethylene ...
Polymerisation Processes Polymerisation Processes Polyethylene ...
Polymerisation Processes Polymerisation Processes Polyethylene ...
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Polyoxymethylene – anionic polymerization of CH 2 O<br />
CH 2 O<br />
Purification, drying<br />
CH 2 O<br />
R Hexane<br />
Suspensions polymerization<br />
Formaldehyde<br />
(water solution.)<br />
Formaldehyde<br />
(Gas)<br />
R O CH2 O CH2O n<br />
Acetic anhydride<br />
End group stabilization by chemical modification<br />
R O CH2 O CH2O O CH<br />
n<br />
3<br />
Dr. Klaus-Dieter Hungenberg, BASF AG Ludwigshafen Vorlesung <strong>Polymerisation</strong>stechnik, Universität Paderborn, WS 07/08 Polymer processes<br />
Polyoxymethylene – end group stabilization<br />
Dr. Klaus-Dieter Hungenberg, BASF AG Ludwigshafen Vorlesung <strong>Polymerisation</strong>stechnik, Universität Paderborn, WS 07/08 Polymer processes<br />
O<br />
89<br />
91<br />
Polyoxymethylene – anionic polymerization of CH 2 O<br />
Dr. Klaus-Dieter Hungenberg, BASF AG Ludwigshafen Vorlesung <strong>Polymerisation</strong>stechnik, Universität Paderborn, WS 07/08 Polymer processes<br />
Polyoxymethylene – cationic bulk process –<br />
‘Schalenkreis’<br />
Milling<br />
Vacuum<br />
Heat Stabilizier<br />
Antioxidant<br />
Polymerized<br />
Material<br />
Additives<br />
Dr. Klaus-Dieter Hungenberg, BASF AG Ludwigshafen Vorlesung <strong>Polymerisation</strong>stechnik, Universität Paderborn, WS 07/08 Polymer processes<br />
90<br />
92
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