Polymerization of nonfood biomass-derived monomers to sustainable polymers

The development of sustainable routes to fine chemicals, liquid fuels, and polymeric materials from natural resources has attracted significant attention from academia, industry, the general public, and governments owing to dwindling fossil resources, surging energy demand, global warming concerns, and other environmental problems. Cellulosic material, such as grasses, trees, corn stover, or wheat straw, is the most abundant nonfood renewable biomass resources on earth. Such annually renewable material can potentially meet our future needs with a low carbon footprint if it can be efficiently converted into fuels, value added chemicals, or polymeric materials. This chapter focuses on various renewable monomers derived directly from cellulose or cellulose platforms and corresponding sustainable polymers or copolymers produced therefrom. Recent advances related to the polymerization processes and the properties of novel biomass-derived polymers are also reviewed and discussed.

Combined CuI-catalysed alkyne–azidecycloaddition and furan–maleimide Diels–Alder “click” chemistry approach to thermoresponsive dendrimers

Cu¹-catalyzed alkyne–azide and Diels–Alder “click” reactions are used in sequence, in a layer-by-layer build-up of dendrimers which undergo retro-Diels–Alder disassembly upon heating.