Journal of Applied Polymer Science, Vol.54, No.8, 1161-1169, 1994
Preparation and Application of Low-Molecular-Weight Poly(Vinyl Chloride) .5. Preparation and Characteristics of Blended Poly(Vinyl Chloride) by 2-Step Suspension Polymerization
Poly(vinyl chloride) (PVC) with relatively broader molecular weight distribution (BMD-PVC) was prepared by two-step suspension polymerization : (1) preparation of poly(vinyl chloride) with relatively higher molecular weight (HMW-PVC) and (2) successive preparation of poly(vinyl chloride) with relatively lower molecular weight (LMW-PVC) in the presence of the resultant HMW-PVC and 2-mercaptoethanol as a chain transfer agent. Some properties of BMD-PVC were investigated : fusion time, melt viscosity, discoloration time, tensile strength at yield, tensile modulus in tension, and elongation at break.