Assertion: kraft lignin | /r/ObjectUse | used as filler
Facets:
value: in synthetic polymers
type: LOCATION
Source sentences:
text: Acetylated softwood kraft lignin (ASKL) was used as filler in synthetic polymers (PE, PP, PS, and PET), and the acetylated lignin was more thermally-stable than the unmodified lignin (Jeong et al. 2012).