Premium
The effect of reprocessing on the properties of PVC
Author(s) -
Covas J. A.,
Silva C. A.
Publication year - 1993
Publication title -
journal of vinyl technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 0193-7197
DOI - 10.1002/vnl.730150304
Subject(s) - rheology , materials science , extrusion , rheometer , surface roughness , degradation (telecommunications) , composite material , surface finish , chemical engineering , engineering , telecommunications
The effects of reprocessing on the mechanical, physical, and rheological properties of a commercial plasticized PVC compound are investigated. Reprocessing experiments at lower, identical, and higher temperatures than those attained during the initial extrusion in a capillary rheometer are undertaken. Repetitive reprocessing is also considered. With the exception of the mean surface roughness—and when the effects of degradation are discarded—the other characteristics of processed and reprocessed PVC are essentially similar. Nevertheless, changes at both the molecular and the morphological level take place during reprocessing, as demonstrated by the results of thermal analysis and surface appearance.