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Real‐time analysis of ethylene vinyl acetate random copolymers using near infrared spectroscopy during extrusion
Author(s) -
Khettry Atul,
Hansen Marion G.
Publication year - 1996
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.10517
Subject(s) - vinyl acetate , materials science , ethylene vinyl acetate , copolymer , extrusion , polymer , adhesive , infrared spectroscopy , polymerization , polymer chemistry , chemical engineering , ethylene , composite material , organic chemistry , catalysis , chemistry , layer (electronics) , engineering
Poly(ethylene vinyl acetate) (EVA) is a very common polymer used in hot melt adhesives. The rheological and thermal‐mechanical properties of these adhesives are strongly related to the content of vinyl acetate (VA) incorporated into this random copolymer during polymerization. Results of in‐line monitoring of VA content in flowing molten EVA polymers, using fiberoptic near infrared spectroscopy, shall be discussed in detail. In‐line monitoring is not only desired for its numerous advantages (such as high quality products, lower waste, lower developmental cycle time, and lower costs) but also because it eliminates the sample handling concerns associated with molten polymers.