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Gradient Density Grafted Polymers on Ground Tire Rubber Particles by Atom Transfer Radical Polymerization
Author(s) -
Coiai Serena,
Passaglia Elisa,
Ciardelli Francesco
Publication year - 2006
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200600376
Subject(s) - polymer , polymer chemistry , atom transfer radical polymerization , natural rubber , polymerization , monomer , styrene , anisole , radical polymerization , materials science , chemistry , chemical engineering , catalysis , composite material , copolymer , organic chemistry , engineering
Summary: The graft polymerization of styrene and (meth)acrylic monomers via ATRP from cross‐linked rubber particles, produced by recycled tires (“ground tire rubber”, GTR), is reported. GTR particles, obtained by cryogenic grinding process, still contain CC unsaturations on the surface, which were first oxidized to hydroxyl groups and then modified by reaction with 2‐bromoisobutyryl bromide to serve as ATRP macroinitiators. Graft polymerizations were carried out using CuBr/CuBr 2 / N , N , N ′, N ″, N ″‐pentamethyldiethylenetriamine as catalytic system in bulk or in anisole at high temperature. The grafted particles were analyzed by ATR‐IR (spectra were recorded on particles surface and cross‐sectional slices), TGA, SEM and X‐ray microanalysis.Arrangement of surface‐grafted polymer assemblies along the particles section.