Hydroxyl‑Terminated Polyfarnesene segmentation by type distinguishes three core families—linear, branched, and functionalized polymers—each further divided into sub‑categories that influence end‑use performance. Linear polyfarnesene, comprising a uniform carbon chain with terminal hydroxyl groups, is the baseline grade and contributes approximately 45 % of total volume; its predictable melt viscosity supports extrusion and injection molding in automotive interior components. Branched variants, accounting for about 30 % of production, introduce side‑chain alkyl groups that disrupt crystallinity, thereby lowering glass‑transition temperature and improving flexibility in sealant and coating matrices. Functionalized polyfarnesene, the remaining 25 %, includes grafted epoxy, acrylate, or silane moieties that enable covalent cross‑linking during curing, expanding applicability to high‑performance adhesives and composite resins. Within functionalized grades, epoxy‑grafted (12 %), acrylate‑grafted (8 %), and silane‑modified (5 %) subtypes are quantified by their respective market shares. Functionalized grades need extra synthesis steps, raising unit costs versus linear and branched forms, limiting their uptake in price‑sensitive bulk adhesives while supporting high‑performance aerospace sealants. This type‑based taxonomy clarifies how molecular architecture drives price differentials and shapes the overall Hydroxyl‑Terminated Polyfarnesene market.
