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Bis(nitrone) as crosslinking agent for unsaturated polyesters via 1,3‐dipolaric cycloaddition
Author(s) -
Cinar Hakan,
Tabatabai Monir,
Ritter Helmut
Publication year - 2012
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4133
Subject(s) - differential scanning calorimetry , cycloaddition , maleic anhydride , fourier transform infrared spectroscopy , polyester , polymer chemistry , gel permeation chromatography , condensation polymer , materials science , nitrone , organic chemistry , nuclear chemistry , chemistry , catalysis , copolymer , polymer , chemical engineering , physics , engineering , thermodynamics
Abstract The microwave‐assisted polycondensation of maleic anhydride and 1,6‐hexanediol was carried out using p ‐toluenesulfonic acid as catalyst. The resulting unsaturated polyester was characterized using Fourier transform infrared (FTIR) and 1 H NMR spectroscopy, and the molecular weight determined using gel permeation chromatography. 4,4′‐Decanediyldioxydi( N ‐methyl‐ p ‐phenylenenitrone) was chosen as a model compound for the crosslinking of the unsaturated polyester. The crosslinking, which is known to proceed via 1,3‐dipolaric cycloaddition, was followed using differential scanning calorimetry. Additionally, the kinetics of the cycloaddition was evaluated at 120 °C using FTIR spectroscopy. Copyright © 2012 Society of Chemical Industry