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Extrusion blow molding of polyvinyl chloride homo‐ and copolymers
Author(s) -
Taylor W.,
King L. F.
Publication year - 1970
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760100403
Subject(s) - materials science , extrusion , copolymer , composite material , vinyl chloride , reactive extrusion , molding (decorative) , blow molding , polyvinyl chloride , polymer chemistry , mold , polymer
Abstract Dynamic mill stability tests of PVC powder blends at the equiviscous temperatures were correlated with the clarity and color obtained in extrusion and blow molding of bottles. Copolymers of vinyl chloride with alkyl vinyl ether and propylene in a calcium‐zinc stabilizer, impact modified formulation had better processability than a homopolymer and produced bottles having lower values of absorbance and yellowness index. Product imperfections which were evident in blow molding of dry blends, but not during milling or capillary rheometer extrusion, were found to be related to the particle size distribution and volatile content of the resin.