S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Material Science and Engineering (재료공학부) Journal Papers (저널논문_재료공학부)
Effect of Plasticizer Type on Gelation and Fusion of PVC Plastisol, Dialkyl Phthalate Series
- Kwak, Seung-Yeop; Nakajima, N.
- Issue Date
- J. Vinyl. Technol., 13, 212
- Different grades of PVC resins and a variety of plasticizers are used to adjust
processability and properties of plastisol. The plastisol, which is a dispersion of
fine particles of PVC in plasticizer, is coated on a substrate and heated in an
oven to gel and fuse. In the gelation stage the resin particles become swollen
with plasticizer and then, in the fusion stage the entire system fuses to become
one homogeneous phase. The finished products are flexible PVC such as coated
fabrics and surgical globes. Different plasticizers, because of the difference in
solvent power, affect the process of gelation and fusion, and hence, processability.
This paper examines such an effect systematically by employing a homologous
series of plasticizers, dialkyl phthalates. The progress of gelation and fusion
are followed by the measurements of dynamic moduli and by the observation
with a scanning electron microscope. As it may be expected, the shorter the
alkyl chain, the higher the solvent power of the plasticizer.
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