Studies on self-crosslinking blend system based on polychloroprene and polyacrylamide : cure characteristics, physical properties and degradation
Polychloroprene and polyacrylamide form a self-crosslinking blend during mixing and moulding in the temperature range 140 to 190°C and this inter-crosslinking is revealed by a torque rise in the rheometric studies. The nature of the stress-strain curves of the blend indicates the generation of a bonded structure where one soft matrix is bonded with a rigid phase and the bonidng fails after a critical loading. The result of hysteresis measurements are in agreement with a bonded structure. the SEm study shows that the majority of the polyacrylamide particles are covered with a layer of rubber matrix. It also shows the distribution of particles are covered with a layer of rubber matrix