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Kinetics of the free radical grafting of diethyl maleate onto linear polyethylene
Author(s) -
Passaglia Elisa,
Siciliano Paola,
Ciardelli Francesco,
Maschio Giuseppe
Publication year - 2000
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/1097-0126(200009)49:9<949::aid-pi403>3.0.co;2-r
Subject(s) - differential scanning calorimetry , kinetics , polyethylene , activation energy , materials science , grafting , polymer chemistry , kinetic energy , order of reaction , high density polyethylene , chemistry , chemical engineering , thermodynamics , reaction rate constant , polymer , composite material , physics , quantum mechanics , engineering
A study of the kinetics of diethyl maleate (DEM) grafting onto linear polyethylene (HDPE) initiated by dicumyl peroxide (DCP), was performed by differential scanning calorimetry (DSC) which allows the determination of kinetic parameters such as the activation energy E a and the order of the reaction n . The calculated kinetic parameters depend on the conditions and vary with the feed composition: in particular the values of E a and n increase with increasing of DCP/DEM ratio because of secondary reactions such as chain extension and degradation. A mathematical model based on the kinetic equations is proposed; it can be used to select feed composition and process parameters to obtain the desired products. © 2000 Society of Chemical Industry