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Polyurethanes from Alcell® lignin

delete1997-01-01
delete96
PRE
AI
R
Ronald W. Thring *
V
Vanderlaan, MN
S
S.L. Griffin
DOI：10.1016/S0961-9534(97)00030-5delete
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Abstract

Abstract

En 中文
Polyurethanes have been prepared from a prototype organosolv lignin by solution casting with polyethylene glycol (PEG) and polymeric methyl-diisocyanate (MDI). The effects of lignin composition and NCO/OH ratio on the mechanical properties and swelling behaviour of the derived poly urethane films were investigated. At low lignin content, flexible but weak polyurethanes were produced regardless of the NCO/OH ratio. Rather tough polyurethanes were prepared at intermediate NCO/OH ratios and lignin contents of 15-25 wt%. At lignin contents of 30 wt% or above, hard and brittle films were obtained irrespective of the NCO/OH ratio employed. Hard and glassy polyurethanes were produced at NCO/OH ratios of 1.8 or greater which were not testable. (C) 1997 Published by Elsevier Science Ltd.
Keywords:
Alcell (R) lignin
polyurethanes
tensile properties
swelling behaviour
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Journal

Biomass and Bioenergy cover
Biomass and Bioenergy
IF:
5.8
Papers:
8.4K
Citations:
2.2W

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