The present work shows the synthesis of amphiphilic polymers based on the hydrophilic dextran and the hydrophobic terpenes as renewable resources. The first step concerns the synthesis of functional terpene molecules by thiol-ene addition chemistry involving amino or carboxylic acid thiols and dihydromyrcenol terpene. The terpene-modified polysaccharides were subsequently synthesized by coupling the functional terpenes with dextran. A reductive amination step produced terpene end-modified dextran with 94% of functionalization, while the esterification step produced three terpene-grafted dextrans with a number of terpene units per dextran of 1, 5, and 10. The amphiphilic renewable grafted polymers were tested as emulsifiers for the stabilization of liquid miniemulsion of terpene droplets dispersed in an aqueous phase. The average hydrodynamic diameter of the stable droplets was observed at about 330 nm.

Syntheses of two new styrene monomers are described, which bear a C4 and C3 chain ending with an anthraquinone (AQ) unit, in para and meta positions of the benzene ring. Both monomers were submitted to radical polymerization, and three linear AQ polystyrene (PS) copolymers ( CP-A , CP-B , and CP-C ) were prepared. The fi rst two differed by the nature of the link between the AQ and the PS network. An ether oxide group in CP-B gave better accessibility of AQ to the lignin polymer in lignocellulosics, and the incorporation of carboxylic acid functions in CP-C increased its hydrophilicity. The copolymers synthesized were characterized by 1 H nuclear magnetic resonance (NMR), 13 C NMR, ultraviolet, and Fourier Transform Infrared (FTIR) spectroscopies, such as by size exclusion chromatography (SEC) and thermogravimetry (TG). A cross-linked copolymer ( CP-3D ) bearing AQ units (11.3 % ) was prepared by emulsion polymerization in the presence of divinylbenzene. Contrary to linear copolymers, the latter was insoluble in aqueous and organic solutions, and displayed remarkable thermal stability. a Present address: D é riv é s R é siniques et Terp é niques,

CST (Crude Sulfate Turpentine) is an upcycled, biomass raw material derived from pinewood, obtained as a by-product of the Kraft process from the pulp and paper industry. The current article provides an overview of major renewable perfumery ingredients obtained from CST-derived alpha- and beta-pinene to-date and part of the Firmenich manufacturing portfolio, post DRT acquisition.