PVC resin needs a complicated formula when processing
though it has a high performance-price ratio and a fine comprehensive property. Rheological property of UPVC dry blend measured by a torque rheometer is an important means to simulate processing and formula design of PVC resin. Reasonable formula was first designed during experiment
and all ingredients of the formula were then mixed together to prepare UPVC dry blend according certain technics and finally measurement of rheological property was carried out. In the experimental teaching designing
the relationships between rheological curves of UPVC dry blend and extrusion process
and the degree of plasticization emphatically established. The total rheological curves of UPVC dry blend were proposed during compression
plasticization
degradation
crosslinking
decomposition and carbonization to ensure students understanding characteristics
formula design and processing of PVC resin entirely.