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Synthesis and Characterization of a Novel Low‐Viscosity Unsaturated Hyperbranched Polyester Resin
Author(s) -
Zhang D.,
Wang J.,
Li T.,
Zhang A.,
Jia D.
Publication year - 2011
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201000329
Subject(s) - thermosetting polymer , trimethylolpropane , phthalic anhydride , branching (polymer chemistry) , maleic anhydride , materials science , polyester , polymer chemistry , intrinsic viscosity , viscosity , polymer , composite material , organic chemistry , copolymer , chemistry , catalysis , polyurethane
Hyperbranched thermosetting resin is the best additive for toughening and reinforcing linear thermosetting resin. A novel low‐viscosity unsaturated hyperbranched polyester resin (UHPR) is synthesized by the reaction between maleic anhydride monoisooctyl alcohol ester and a hydroxyl‐ended hyperbranched polyester resin (HPR) prepared from phthalic anhydride (PA) and trimethylolpropane (TMP). The structure of HPR is characterized by FT‐IR and 1 H NMR, and its degree of branching is deduced by comparing with the 1 H NMR spectrum of a model compound. The molecular weights of HPR and UHPR are determined by theoretical calculation and MALDI‐TOF MS measurements. This low‐viscosity (< 10 000 cP) novel UHPR can be applied in the field of environment‐friendly coatings and in toughening and reinforcing linear unsaturated polymers.