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Some observations on the flow behavior of polyvinyl chloride melts
Author(s) -
Collins E. A.,
Metzger A. P.
Publication year - 1971
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.760110603
Subject(s) - dispersity , materials science , polymer , viscosity , mixing (physics) , polyvinyl chloride , newtonian fluid , thermodynamics , rheology , flow (mathematics) , range (aeronautics) , polymer science , polymer chemistry , chemical engineering , composite material , mechanics , physics , quantum mechanics , engineering
Melt studies on PVC systems at elevated temperature or long times are difficult. One consequence is that measurements may be possible only in the non‐Newtonian region. The results indicate that even in this case the melt viscosity can be related exponentially with the weight average molecular weight by the 3.4 power. Since literature data are scarce, attempts were made to extend the range by mixing polymers. This led to the complication of dispersity both on a molecular scale and on a macroscopic level. The latter point is particularly important for PVC studies since the polymers are frequently blended with materials having different viscosities.