TY - JOUR
T1 - Rheological changes during a urethane network polymerization
AU - Lipshitz, Stephen D.
AU - Macosko, Christopher W.
PY - 1976/12
Y1 - 1976/12
N2 - Trifunctional poly‐ε‐caprolactone polyol was polymerized with a chain‐extended 1,6‐hexane diisocyanate, and the rheology followed by cone and plate flow. Viscosity was found to be independent of shear rate up to at least 102 N.s/m2 (103 poise) and 30s−1. Extent of reaction was monitored by a periodic titration for isocyanate groups. Using branching theory, viscosity was related to extent of reaction and temperature. Such relations should be useful for process models. Normal force data for the curing system are also reported.
AB - Trifunctional poly‐ε‐caprolactone polyol was polymerized with a chain‐extended 1,6‐hexane diisocyanate, and the rheology followed by cone and plate flow. Viscosity was found to be independent of shear rate up to at least 102 N.s/m2 (103 poise) and 30s−1. Extent of reaction was monitored by a periodic titration for isocyanate groups. Using branching theory, viscosity was related to extent of reaction and temperature. Such relations should be useful for process models. Normal force data for the curing system are also reported.
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U2 - 10.1002/pen.760161205
DO - 10.1002/pen.760161205
M3 - Article
AN - SCOPUS:0017273073
SN - 0032-3888
VL - 16
SP - 803
EP - 810
JO - Polymer Engineering & Science
JF - Polymer Engineering & Science
IS - 12
ER -