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Phosphites in polyolefin process stabilization
Author(s) -
Ray Wesley C.,
Isenhart Kyle
Publication year - 1975
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.760151003
Subject(s) - polyolefin , stabilizer (aeronautics) , melt flow index , materials science , olefin fiber , process (computing) , flow (mathematics) , chemical engineering , heat stability , organic chemistry , polymer chemistry , composite material , chemistry , polymer , computer science , mechanical engineering , mathematics , geometry , layer (electronics) , engineering , copolymer , operating system
The use of stabilizer systems containing phosphites in polyolefins is well‐established in the technical and patent literature. In addition to the known effects of improved heat and color stability for polyolfins, we have recently found that phosphite‐containing stabilizer systems impart a process stabilizing effect as evidenced by melt flow analysis. By monitoring the poly‐olefin melt flow after multiple extrusions with increasing temperature, it was found that the combination of phenolics and phosphites has a marked influence on the control of melt flow of polyolefins and the effect appears to be synergistic in operation.