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Reactive extrusion of PP/natural rubber blends
Author(s) -
Yoon Lee Keun,
Choi Chi Hoon,
Kim Byung Kyu
Publication year - 1995
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1995.070560214
Subject(s) - reactive extrusion , peroxide , polypropylene , materials science , viscosity , natural rubber , melt flow index , organic peroxide , extrusion , polymer chemistry , mooney viscosity , composite material , intrinsic viscosity , chemistry , organic chemistry , copolymer , polymer
Reactive extrusion of polypropylene (PP)/natural rubber (NR) (90/10) blends was conducted in the presence of a peroxide [1,3‐bis( t ‐butylperoxy)benzene] and coagent (trimethylolpropanetriacrylate, TMPTA). Effects of peroxide and coagent content were studied in terms of melt index (MI), melt viscosity, morphology, thermal, and mechanical properties. At a constant content of the coagent, melt viscosity increased at a low and decreased at a high content of the peroxide. On the other hand, melt viscosity increased monotonically with the coagent concentration at constant peroxide content. The increase and decrease of viscosity were interpreted in terms of crosslinking and chain scission of PP, which governed the rubber domain size and mechanical properties of the reactive blends. © 1995 John Wiley & Sons, Inc.