Randomly branched molecules, rather than regular stars, are the type which occur in most commercial polymerizations. However their structure is difficult to determine. By step-reaction polymerization a randomly branched system of known structure can be obtained using a polyfunctional comonomer. In this work the authors have studied the viscosity rise during polymerization of a well defined system composed of long molecules of bifunctional polydimethylsiloxane with reactive groups at their ends and small trifunctional and tetrafunctional molecules. Experimental data are tabulated, plotted and summarized.
|Original language||English (US)|
|Number of pages||4|
|Journal||American Chemical Society, Polymer Preprints, Division of Polymer Chemistry|
|State||Published - Jan 1 1979|
|Event||Pap presented at a Meet, Symp on Branched Polym - Washington, DC, USA|
Duration: Sep 10 1979 → Sep 14 1979