Results 131 to 140 of about 82,854 (283)

Chemical Recycling of Polycarbonate Acrylonitrile Butadiene Styrene Blends via Organocatalyzed Acetolysis. [PDF]

open access: yesChemSusChem
Polycarbonate/acrylonitrile butadiene styrene (PC/ABS) has been chemically recycled by depolymerizing the PC via base‐catalyzed acetolysis to yield acetylated bisphenol A. Unlike alternative methods, the presence of ABS did not hinder acetolysis, allowing recovery of ABS from these multimaterials. A new depolymerization catalyst, 4‐pyrrolidinylpyridine,
Pool ME   +4 more
europepmc   +2 more sources

Poly(sarcosine) Lipid Synthesis From CO2‐Based Sarcosine‐N‐Carboxyanhydride

open access: yesMacromolecular Rapid Communications, EarlyView.
In this work, we optimize and scale‐up a CO2‐based synthesis of sarcosine‐N‐carboxyanhydride (Sar‐NCA) to the gram scale. The low toxicity and simplicity of the approach make it an attractive alternative to current toxic phosgene‐based approaches. The CO2‐based Sar‐NCA has sufficient purity for controlled polymerization.
Florian T. Kaps   +7 more
wiley   +1 more source

FeCl3‐Catalyzed Synthesis of Ynones from Silylated Alkynes and Acetic Anhydride

open access: yesChemistryOpen, EarlyView.
The synthesis of alkynones from silylated alkynes and acid chlorides, first reported by Birkhofer in 1963, remains a valuable transformation. However, its reliance on stoichiometric AlCl3 and corrosive reagents raises environmental and practical concerns. To address this, a greener protocol using catalytic FeCl3 and acetic anhydride is developed.
Paul Charki   +2 more
wiley   +1 more source

Microwave-Assisted Three Component Cyclocondensation Reaction: A Facile Synthesis of Highly Functionalized Cyclohexene Derivatives [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2007
Microwave-assisted three component cyclocondensation reactions of aldehydes, amides and dienophiles in the presence of acetic anhydride and para-toluenesulfonic acid as a catalyst to afford the highly substituted cyclohexene derivatives, in relatively ...
Ahmad Shaabani, Peiman Mirzaei
doaj  

Improved cure method for single component silicone rubber [PDF]

open access: yes, 1969
Water is incorporated in a carrier and then thoroughly mixed with the single component silicone rubber containing acetic anhydride as a curing agent.
Lippitt, M. W.
core   +1 more source

Microwave‐Assisted Organic Syntheses in Deep Eutectic Solvents: A Win‐Win Association for Sustainable Chemistry

open access: yesChemistryOpen, EarlyView.
In organic synthesis, deep eutectic solvents (DES) have demonstrated their ability to be used as reaction media for the development of reactions in line with green chemistry principles. This review presents an overview of microwave‐assisted organic synthesis in DES, highlighting the diversity of uses for these solvents, their role in mechanisms, the ...
Pierre‐Olivier Delaye   +2 more
wiley   +1 more source

Mechanochemical Treatment of Cellulose: A Strategy for Developing Functional Biocomposite Materials

open access: yesPolymer Engineering &Science, EarlyView.
Mechanochemistry as an integrated approach for combining fiber defibrillation, activation, surface functionalization, and cellulose‐based composite fabrication in a single or reduced number of steps. ABSTRACT Cellulose‐based biocomposites are attracting increasing scientific and industrial interest due to their sustainable origin, biodegradability, and
Murilo O. da Luz   +3 more
wiley   +1 more source

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