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Synthesis and characterization of copolymers of urea–succinic acid–ethylene glycol and copolymers of urea–succinic acid–glycerol
Author(s) -
Landim Lucas B.,
Pinto José Carlos,
CabralAlbuquerque Elaine C.M.,
Cunha Silvio,
Fialho Rosana L.
Publication year - 2018
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.24746
Subject(s) - ethylene glycol , copolymer , succinic acid , glycerol , thermal stability , materials science , urea , polymer chemistry , fourier transform infrared spectroscopy , thermogravimetric analysis , aqueous solution , ethylene , chemical engineering , nuclear chemistry , polymer , organic chemistry , chemistry , catalysis , composite material , engineering
The main aim of the present study is the analysis of the structural, chemical, and thermal properties of urea–succinic acid–ethylene glycol (U/SA/EG) and urea–succinic acid–glycerol (U/SA/GLY) copolymers produced in aqueous solutions with different compositions. These materials find potential use in agricultural applications. The copolymers were characterized by Fourier transform infrared spectroscopy (ATR‐FTIR), matrix‐assisted laser desorption ionization process (MALDI TOF), nuclear magnetic resonance (NMR), and thermal gravimetric analysis (TGA/DTG). The obtained results indicate that the use of ethylene glycol and glycerol as comonomers can improve some of the final copolymer properties, leading to increase of the copolymer thermal stability and increase of the average molecular weights. However, addition of glycerol in excess can reduce the thermal stability of the final resin. Additionally, it is shown that ethylene glycol and glycerol can also act as chain transfer agents, also allowing for chain branching. POLYM. ENG. SCI., 58:1575–1582, 2018. © 2017 Society of Plastics Engineers