Polymerisation Processes Polymerisation Processes Polyethylene ...
Polymerisation Processes Polymerisation Processes Polyethylene ...
Polymerisation Processes Polymerisation Processes Polyethylene ...
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SAN copolymerization behaviour<br />
X_Styrol<br />
1.0<br />
0.8<br />
0.6<br />
0.4<br />
0.2<br />
0.0<br />
Copolymerisationsdiagramm für<br />
Styrol / Acrylnitril<br />
0 0.2 0.4 0.6 0.8 1<br />
x_Styrol<br />
r S=0.34<br />
r AN=0.05<br />
Dr. Klaus-Dieter Hungenberg, BASF AG Ludwigshafen Vorlesung <strong>Polymerisation</strong>stechnik, Universität Paderborn, WS 07/08 Polymer processes<br />
SAN copolymers in CSTR<br />
To flare<br />
SAN,<br />
EB<br />
Multiple degassing unit:<br />
toxic AN<br />
high temperatures give<br />
yellow polymer<br />
W-% AN in polymer<br />
SAN-melt<br />
To Extruder<br />
65% AN<br />
30% AN<br />
24% AN<br />
conversion<br />
10% AN<br />
Dr. Klaus-Dieter Hungenberg, BASF AG Ludwigshafen Vorlesung <strong>Polymerisation</strong>stechnik, Universität Paderborn, WS 07/08 Polymer processes<br />
M<br />
PRC<br />
continous<br />
SAN-<strong>Polymerisation</strong><br />
degassing<br />
SAN-Granulat<br />
57<br />
59<br />
SAN copolymers by….<br />
Suspension polymerization<br />
only azeotropic composition<br />
water- solubility of AN<br />
Emulsion polymerzation<br />
semi- batch, starved feed<br />
shows some haze<br />
Continuous solution polymerization in CSTR<br />
all compositions available<br />
Dr. Klaus-Dieter Hungenberg, BASF AG Ludwigshafen Vorlesung <strong>Polymerisation</strong>stechnik, Universität Paderborn, WS 07/08 Polymer processes<br />
Rubber modification of SAN –> ABS<br />
rubber from emulsion or solution process<br />
Emulsion polymerization<br />
•High glance of surface<br />
•Yellowish colour<br />
•waste water<br />
•Separate polymerization of SAN<br />
(solution polymerization) and rubber<br />
(in emulsion)<br />
1µm<br />
Solution polymerisation<br />
Mat surface<br />
White<br />
No waste water<br />
Solution polymerization of SAN in the<br />
presence of rubber as for HIPS<br />
Dr. Klaus-Dieter Hungenberg, BASF AG Ludwigshafen Vorlesung <strong>Polymerisation</strong>stechnik, Universität Paderborn, WS 07/08 Polymer processes<br />
1µm<br />
58<br />
60
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