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Characterization of LDPE grafted with Diethylmaleate by Gamma Radiation: Application of FTIR, GPC and SSA Techniques
Author(s) -
Sánchez Y.,
Albano C.,
Perera R.,
Karam A.,
Silva P.
Publication year - 2007
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.200751113
Subject(s) - low density polyethylene , grafting , branching (polymer chemistry) , fourier transform infrared spectroscopy , monomer , melt flow index , materials science , polymer chemistry , polymer , polyethylene , nuclear chemistry , yield (engineering) , chemical engineering , chemistry , copolymer , composite material , engineering
Abstract Summary: The grafting of diethyl maleate onto low‐density polyethylene using gamma irradiation as initiator has been evaluated. The grafting degree was estimated by FTIR and with the use of a calibration curve. The functionalized polymers were characterized by DSC, MFI, SSA and GPC. An increase in the grafting degree with the radiation dose and the concentration of the functional monomer was found. Branching seemed to be the preferential reaction induced by radiation, causing an increase in average molecular weights with the consequently reduction of melt flow index values. The molecular segregation induced by the calorimetric treatment showed that grafting occurs preferentially through secondary carbon sequences.