On the chemistry of furfuryl alcohol polymerization: A review

Abstract This review dives into the intricate chemistry of furfuryl alcohol (FA) polymerization, a critical process for producing FA‐based resins (oligomers and polymers). Despite over a century of studies, the complexity of FA resinification continues to intrigue scientists, engendering extensive discourses. The inherent complexity and heterogeneity of FA resins have thwarted attempts to propose a universally applicable structural elucidation, prompting the investigation of numerous proposed mechanisms. Drawing upon an extensive corpus of literature, we survey various proposed mechanisms and representative structural attributes of a range of FA polymeric systems. The insights from a rich tapestry of experimental evidence collectively illuminate the manifold intermediates and pathways that characterize various FA polymerization techniques. A critical appraisal of prevailing debates and counterarguments offers a nuanced perspective on the diverse facets of FA polymerization chemistry. Moreover, this work underscores the latent potential of biobased chemistry, from the perspective of furan chemistry, as a potent catalyst for driving the essential objectives of de‐fossilization and sustainability within the chemical and materials industries. Subsequently, it provides valuable insights into the present state of knowledge on FA polymerization, thereby serving as a vanguard for delineating future research trajectories in this captivating field.