Abstract:
:Native hemicellulose lacks many of the properties that make fossil fuel-based polymers excellent for use in today's industrial products and processes. The mechanical and thermal properties of the hemicellulose can, however, be modified, and its processability increased. We functionalized galactoglucomannan to lower its glass transition temperature (Tg) and thereby increase its processability. The functionalization was achieved through an etherification reaction with butyl glycidyl ether used at three molar ratios. Films were produced, and their mechanical and thermal properties were evaluated. Thermogravimetric analysis showed that increased substitution increased the degradation temperature and decreased the water content in the sample, implying increased hydrophobicity upon modification. Dynamic mechanical analysis indicated that butyl glycidyl ether functionalization alters the thermal properties of the modified films both in the absolute values of Tg and in the strength of the films. The etherification reaction resulted in a more ductile material than the unmodified galactoglucomannan (GGM).
journal_name
Biomacromoleculesjournal_title
Biomacromoleculesauthors
Härdelin L,Bernin D,Börjesson M,Ström A,Larsson Adoi
10.1021/acs.biomac.9b01730subject
Has Abstractpub_date
2020-05-11 00:00:00pages
1832-1840issue
5eissn
1525-7797issn
1526-4602journal_volume
21pub_type
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