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Structure–properties relations of thermally cured epoxy–lignin polyblends
Author(s) -
Feldman D.,
Banu D.,
Natansohn A.,
Wang J.
Publication year - 1991
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.1991.070420607
Subject(s) - adhesive , epoxy , materials science , differential scanning calorimetry , composite material , lignin , dynamic mechanical analysis , polymer , organic chemistry , chemistry , layer (electronics) , physics , thermodynamics
A bisphenol A based epoxy adhesive (EP) was modified by polyblending with Kraft Lignin (L). A systematic investigation of the thermally cured EP‐L polyblends with up to 40% by weight L was undertaken. Adhesive shear tests, differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and solid‐state CP‐MAS NMR spectroscopy were performed to establish the effect of L on the mechanical properties of the polyblends and on the morphology of these crosslinked structures. The possibility of an enhanced degree of bonding between L and the EP network is discussed. This bonding can arise from a chemical reaction between L and some unreacted amine groups present in the hardener.