Premium
Structural evidence of grafting in electron beam irradiated starch‐allylurea blends
Author(s) -
Olivier A.,
LunaCarlos J.,
Cazaux F.,
Coqueret X.
Publication year - 2003
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200390032
Subject(s) - grafting , covalent bond , irradiation , starch , monomer , yield (engineering) , materials science , fourier transform infrared spectroscopy , maltotriose , electron beam processing , polymer chemistry , chemical engineering , polymer , chemistry , organic chemistry , composite material , maltose , physics , nuclear physics , engineering , enzyme
The effectiveness of covalent grafting in mixtures of N‐allylurea (AU) and amorphized starch submitted to electron beam irradiation was studied for elucidating the chemical changes at the origin of the physical stabilization observed after radiation processing. FTIR and nmr analysis were used to quantify the progress of AU conversion upon irradiation of the mixtures and to gain information on the structure of the products. The grafting yield was determined by gravimetry after selective solubilization that extracts AU monomer and its homopolymer from the covalently modified polysaccharide. MALDI‐TOF spectrometry applied to irradiated mixtures of AU and maltotriose, as a model compound, affords unambiguous evidence of covalent grafting. The obtained data allow to estimate the size of the AU grafts and to propose mechanistic pathways for radiation grafting.