The viscosity in an epoxy-novolac system was studied as a function of conversion and temperature. The viscosity of the thermosetting system showed to be proportional to a power of the calculated weight-average molecular weight; however, the exponent of the molecular weight varies with temperature. A better correlation is found if the viscosity is expressed as a product of molecular weight and a friction factor which depends on both temperature and Tg. Data of viscosity versus conversion at different temperatures can be described by one single straight line of slope 1 if this approach is employed.
|Original language||English (US)|
|Number of pages||6|
|Journal||Polymeric Materials Science and Engineering, Proceedings of the ACS Division of Polymeric Materials Science and Engineering|
|State||Published - Dec 1 1988|
|Event||Proceedings of the ACS Division of Polymeric Materials: Science and Engineering - Fall Meeting - Los Angeles, CA, USA|
Duration: Sep 26 1988 → Sep 30 1988