Fast pyrolysis bio‐oil as precursor of thermosetting epoxy resins. Issue 8 (14th November 2017)

• Record Type: Journal Article
• Authors: Sibaja, Bernal; Adhikari, Sushil; Celikbag, Yusuf; Via, Brian; Auad, Maria L.
• Is Part Of: Polymer engineering & science. Volume 58:Issue 8(2018)
• Page Start: 1296
• Page End: 1307
• Publication Date: 2017-11-14
• Subjects: Polymer engineering -- Periodicals; Polymers -- Periodicals; 668.9
• DOI: 10.1002/pen.24694
• Languages: English
• ISSNs: 0032-3888

Abstract

Abstract : Fast pyrolysis bio‐oil was employed as a source of phenolic compounds in the production of a bio‐based polymeric network. The bio‐oil was reacted with epichlorohydrin in alkaline medium using benzyltriethylammonium chloride as a phase transfer catalyst. The amount of free phenolic hydroxyl groups before and after modification was quantified through 31 P‐NMR spectroscopy; and the epoxy content of the bio‐oil upon the chemical functionalization was measured by means of a titration using HBr in acetic acid solution. Grafting of epoxy functions onto the monomer`s structure was studied by FTIR. Likewise, α‐resorcylic acid was also modified with reactive epoxy moieties, and used as low molecular weight comonomer. The epoxidized derivatives of the bio‐oil were cured in epoxy polymers with 4‐dimethylaminopyridine. Thermo‐mechanical characterization showed that the obtained materials behave as thermoset amorphous polymers, exhibiting modulus values ranging from approximately 1.5–3.4 GPa at room temperature and glass transition temperatures above 100°C. POLYM. ENG. SCI., 58:1296–1307, 2018. © 2017 Society of Plastics Engineers