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Kinetics of, free radical modification of polyolefins in extruders – chain scission, crosslinking and grafting
Author(s) -
Hamielec A. E.,
Gloor P. E.,
Zhu S.
Publication year - 1991
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450690302
Subject(s) - grafting , chain scission , kinetics , bond cleavage , polymer chemistry , chain (unit) , polymer science , beta scission , materials science , radical polymerization , free radical reaction , chemistry , polymer , copolymer , composite material , organic chemistry , radical , catalysis , physics , radical substitution , quantum mechanics , astronomy
Free radical reactions, carried out in polymer melts, have become a popular method of chemically modifying polyolefins. The elementary free‐radical reactions which are relevant in the chemical modification of polyolefins at high temperatures in extruders, such as chain transfer to polymer via primary and polymer radicals, β‐scission, double bond addition and bimolecular termination, affect chain scission, long chain branching, crosslinking and grafting. This brief review will discuss some of the work focused on the kinetics and mathematical modelling of these reactions.