INFLUENCE OF REACTING RHEOLOGY ON STRUCTURE AND PROPERTIES OF BLOCK POLYURETHANE
Fang Zhiqi (Institute of Chemical Eng., Hefei University of Technology, Hefei)
The reacting rheological behavior in the process of polyurethane urea fast chain extention was studied by means of adiabatic reacting rheometer designed by ourselves. The temperature and viscosity vs time in the process of adiabatic chain extention reaction could be measured by the rheometer at the same time. Concerning the adiabatic temperature raises with reaction heat shows the reacting extent of functional groups when get to gel. The diagrams of viscosity vs time and gelling time could show the segregation extent of the soft and hard segments. The reacting extent of functional groups and segregation extent of micro phases have influence on microstructure and mechanic properties of block polyurethane urea.
【CateGory Index】： TQ334.1