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Mechanisms and performance of hydrotalcite acid neutralizers in thermoplastics
Author(s) -
Patel S. H.,
Xanthos M.,
Grenci J.,
Klepak P. B.
Publication year - 1995
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.730010318
Subject(s) - hydrotalcite , polyolefin , melt flow index , materials science , extrusion , antioxidant , high density polyethylene , chemical engineering , composite material , polymer , chemistry , organic chemistry , polyethylene , catalysis , layer (electronics) , engineering , copolymer
The mechanism of color development during processing of polyolefin formulations containing phenolic antioxidant/hydrotalcite acid neutralizers was investigated in the absence and presence of polymer with residual acidity. IR spectroscopy was used to follow antioxidant/hydrotalcite interactions and thermal analysis to evaluate differences between commercial hydrotalcites from two different sources. Performance characteristics in terms of yellowness index and melt flow were evaluated by multiple extrusion of fully formulated PP and HDPE resins.