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Polyurethanes and polyesters from lignin
Author(s) -
Bonini Carlo,
D'Auria Maurizio,
Emanuele Lucia,
Ferri Rachele,
Pucciariello Rachele,
Sabia Anna Rita
Publication year - 2005
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.22277
Subject(s) - gel permeation chromatography , differential scanning calorimetry , phenylisocyanate , lignin , polymer chemistry , polyurethane , polyester , materials science , infrared spectroscopy , prepolymer , ethylene glycol , size exclusion chromatography , fourier transform infrared spectroscopy , nuclear chemistry , chemistry , organic chemistry , polymer , chemical engineering , physics , engineering , thermodynamics , enzyme
Lignin, obtained through steam explosion from straw, was completely characterized via elemental analysis, gel permeation chromatography, ultraviolet and infrared spectroscopy, and 13 C and 1 H nuclear magnetic resonance spectrometry. Polyurethanes were obtained by treating steam‐exploded lignin from straw with 4,4′‐methylenebis(phenylisocyanate), 4,4′‐methylenebis(phenylisocyanate) –ethandiol, and poly(1,4‐butandiol)tolylene‐2,4‐diisocyanate terminated. The obtained materials were characterized by using gel permeation chromatography, infrared spectroscopy, and scanning electron microscopy. Differential scanning calorimetry analysis showed a T g at −6°C, assigned to the glass transition of the poly(1,4‐butandiol) chains. The presence of ethylene glycol reduced the yields of the polyurethanes. The use of the prepolymer gave the best results in polyurethane formation. Steam‐exploded lignin was used as the starting material in the synthesis of polyesters. Lignin was treated with dodecanoyl dichloride. The products were characterized by using gel permeation chromatography, infrared spectroscopy, 13 C and 1 H nuclear magnetic resonance spectrometry, and scanning electron microscopy. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 98: 1451–1456, 2005