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Polyurethane-based sealants modified by blending with Kraft lignin

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.1002/app.1988.070350118
AuthorSearch for: ; Search for: 1ORCID identifier: https://orcid.org/0000-0001-7640-3701; Search for:
Affiliation
  1. National Research Council Canada. NRC Institute for Research in Construction
FormatText, Article
Abstract
An investigation was conducted to establish the viability of blending Kraft lignin (L), a naturally occuring, readily available polymer resource, with polyurethane-(PU) based sealants. The sealants were tested in a detailed program where lignin-sealant blends, having blend ratios varying between 0 and 20 pbw L, were prepared on substrates of aluminum, mortar, and wood, and subjected to laboratory control (C), artificial weathering (AW), and natural weathering (NW) conditions. Results of tension testing showed that generally, lignin acts as a reinforcing agent which adds rigidity to the polymeric matrix, as indicated by the increase in toughness and modulus of blended sealants with the addition of lignin. In addition, the curing mode of PU, as determined by sequence hardness testing, was modified with the addition of lignin.
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  • Journal of Applied Polymer Science 35, no. 1: 247–257.
LanguageEnglish
Peer reviewedYes
NRC publication
This is a non-NRC publication

"Non-NRC publications" are publications authored by NRC employees prior to their employment by NRC.

NPARC number23000662
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Record identifierc9b4fe05-3368-4351-9b80-70406ba86f94
Record created2016-08-19
Record modified2020-06-02
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