Assertion: lignin's group | /r/HasProperty | converted to carboxylic acids
Facets:
Source sentences:
text: In making lignin suitable for incorporation into these resins, lignin hydroxyl groups are converted to carboxylic acids by reaction with maleic anhydride or succinic anhydride since hydroxyl groups in lignin often are not sufficiently reactive to cross-link efficiently in the absence of catalysts or comonomers.