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The effect of four catalysts, Potassium carbonate (K2CO3), 1,8-diazabicyclo [5.4.0] undec-7-ene (DBU), dicyanodiamide (DICY), and 1,4-diazabicyclo [2.2.2] octane (DABCO) was evaluated in terms of lignin polyol yield and weight gain. The ensuing polyols were also characterized by fourier transform infrared (FTIR), H-1 NMR, C-13 NMR, and size exclusion chromatography (SEC) to determine the degree of the substitution (DS), degree of polymerization (DP), and the molecular weight, respectively. Only a minor proportion of PC (ca. 3-15%) was converted to propylene glycol/homooligomers as revealed by high performance liquid chromatography (HPLC). All catalysts promoted preferential derivatization of lignin phenolic OH groups by oxypropyl moieties. The maximum average DP of propylene oxide chains in oxyalkylated Lignoboost (R) kraft lignin (oKL) was 1.85 per one phenylpropane unit (PPU) using DBU. Conversely, the DP of oKL using DICY was very low (0.27/PPU). DICY's catalytic activity seems to be jeopardized due to the formation of unreactive adducts with lignin. The oKL obtained using DBU, DABCO, and K2CO3 have potential to be used as polyols in the production of polyurethanes as the corresponding hydroxyl number (I-OH) is in the range of 198-410 mg KOH g(-1).", "subjects" : [ { "otype" : "Classification", "mtid" : 11027, "link" : "/api/classification/11027", "label" : "Anyagmérnökség", "published" : true, "snippet" : true }, { "otype" : "Classification", "mtid" : 12566, "link" : "/api/classification/12566", "label" : "Mezőgazdaság, erdészet, halászat", "published" : true, "snippet" : true } ], "keywords" : [ { "otype" : "Keyword", "mtid" : 1002182, "link" : "/api/keyword/1002182", "label" : "PROPYLENE CARBONATE", "published" : true, "oldId" : 1002182, "snippet" : true }, { "otype" : "Keyword", "mtid" : 1838153, "link" : "/api/keyword/1838153", "label" : "organocatalysts", "published" : true, "snippet" : true }, { "otype" : "Keyword", "mtid" : 1838947, "link" : "/api/keyword/1838947", "label" : "Oxyalkylation", "published" : true, "snippet" : true }, { "otype" : "Keyword", "mtid" : 2086352, "link" : "/api/keyword/2086352", "label" : "bio-based polyols", "published" : true, "snippet" : true }, { "otype" : "Keyword", "mtid" : 2086353, "link" : "/api/keyword/2086353", "label" : "Lignoboost (R) lignin", "published" : true, "snippet" : true } ], "digital" : null, "printed" : null, "sourceYear" : 2020, "foreignEdition" : true, "foreignLanguage" : true, "fullPublication" : true, "conferencePublication" : false, "nationalOrigin" : null, "missingAuthor" : false, "oaType" : "NONE", "oaCheckDate" : "2021-10-02", "oaFree" : false, "citationCount" : 0, "citationCountUnpublished" : 0, "citationCountWoOther" : 0, "independentCitCountWoOther" : 0, "doiCitationCount" : 0, "wosCitationCount" : 0, "scopusCitationCount" : 0, "independentCitationCount" : 0, "unhandledCitationCount" : 0, "citingPubCount" : 0, "independentCitingPubCount" : 0, "unhandledCitingPubCount" : 0, "citedPubCount" : 1, "citedCount" : 1, "ratings" : [ { "otype" : "SjrRating", "mtid" : 10753483, "link" : "/api/sjrrating/10753483", "label" : "sjr:Q3 (2020) Scopus - Biomaterials HOLZFORSCHUNG 0018-3830 1437-434X", "listPos" : 64, "rankValue" : 0.74, "type" : "journal", "ratingType" : { "otype" : "RatingType", "mtid" : 10002, "link" : "/api/ratingtype/10002", "label" : "sjr", "code" : "sjr", "published" : true, "snippet" : true }, "subject" : { "otype" : "ClassificationExternal", "mtid" : 2502, "link" : "/api/classificationexternal/2502", "label" : "Scopus - Biomaterials", "published" : true, "oldId" : 2502, "snippet" : true }, "ranking" : "Q3", "calculation" : "DIRECT", "published" : true, "snippet" : true } ], "ratingsForSort" : "Q3", "hasCitationDuplums" : false, "directInstitutesForSort" : "", "ownerAuthorCount" : 3, "ownerInstituteCount" : 12, "directInstituteCount" : 0, "authorCount" : 4, "contributorCount" : 0, "hasQualityFactor" : true, "link" : "/api/publication/31473016", "label" : "Vieira Fernanda R. et al. 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