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116 Newest Publications about the topic polycarbonates

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Organocatalytic Synthesis and Evaluation of Polycarbonate Pendant Polymer:β-Cyclodextrin-Based Nucleic Acid Delivery Vectors

17-Jan-2018 | Kyle J. Wright; Vivek D. Badwaik; Shayak Samaddar; Seok-Hee Hyun; Kristof Glauninger; Taeyoon Eom; David H. Thompson, Macromolecules, 2018

A family of mPEG-b-polycarbonate (mPEG-PC) diblock pendant polymers were synthesized from trimethylene carbonate and other cyclic carbonate monomers bearing hydrophobic guest ligands via organocatalytic ring-opening polymerization using 1,4,5-triazabicyclo[4.4.0]dec-5-ene catalyst or ...

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Functional Polycarbonates from Carbon Dioxide and Tailored Epoxide Monomers: Degradable Materials and Their Application Potential

08-Jan-2018 | Markus Scharfenberg, Jeannette Hilf, Holger Frey, Advanced Functional Materials, 2018

Abstract Aliphatic polycarbonates synthesized from carbon dioxide (CO2) and epoxides are resource‐saving, highly biocompatible and biodegradable polymers. Since the discovery of the copolymerization of epoxides and CO2 in 1969 by Inoue et al., this has become an important and useful technology ...

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Multiarm Polycarbonate Star Polymers with a Hyperbranched Polyether Core from CO2 and Common Epoxides

21-Aug-2017 | Markus Scharfenberg; Jan Seiwert; Maximilian Scherger; Jasmin Preis; Moritz Susewind; Holger Frey, Macromolecules, 2017

Multiarm star copolymers, consisting of hyperbranched poly(ethylene oxide) (hbPEO) or poly(butylene oxide) (hbPBO) polyether copolymers with glycerol branching points as a core, and linear aliphatic polycarbonate arms generated from carbon dioxide (CO2) and epoxide monomers, were synthesized via ...

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Rigid Hyperbranched Polycarbonate Polyols from CO2 and Cyclohexene-Based Epoxides

01-Aug-2017 | Markus Scharfenberg; Silja Hofmann; Jasmin Preis; Jeannette Hilf; Holger Frey, Macromolecules, 2017

Hyperbranched, multifunctional polycarbonate polyols based on CO2, cyclohexene oxide (CHO), and the “inimer” (initiator–monomer) (4-hydroxymethyl)cyclohexene oxide (HCHO) were prepared in one-pot syntheses. The related linear poly(hydroxymethyl cyclohexene carbonate) structures based on protected ...

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Nanocomposites of Polymeric Biomaterials Containing Carbonate Groups: An Overview

17-Jul-2017 | Iman Taraghi, Sandra Paszkiewicz, Janusz Grebowicz, Abdolhossein Fereidoon, Zbigniew Roslaniec, Macromolecular Materials and Engineering, 2017

The modification of biomaterials using nanoadditives can lead to the development of novel materials for a wide variety of biomedical applications such as drug administration systems, tissue engineering, bioresistance coatings, and biomedical instruments. Moreover, a further improvement of ...

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Rigid Polyurethanes, Polyesters, and Polycarbonates from Renewable Ketal Monomers

11-Jul-2017 | Sophie Lingier; Yann Spiesschaert; Bastiaan Dhanis; Stefaan De Wildeman; Filip E. Du Prez, Macromolecules, 2017

Two novel biobased diols containing rigid cyclic ketal functionalities have been synthesized on a relatively large scale from glycerol and two diketones, i.e., 1,4-cyclohexanedione and 4,4′-bicyclohexanone. The diols have been used in several types of step growth reactions, resulting in ...

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CO2‐sourced α‐Alkylidene Cyclic Carbonates: A Step Forward in the Quest for Functional Regioregular Poly(urethane)s and Poly(carbonate)s.

28-Jun-2017 | Sandro Gennen, Bruno Grignard, Thierry Tassaing, Christine Jerome, Christophe Detrembleur, Angewandte Chemie International Edition, 2017

We describe a robust platform for the synthesis of a large diversity of novel functional CO2‐sourced polymers by exploiting the regio‐controlled and site selective ring‐opening of α‐alkylidene carbonates by various nucleophiles. The remarkable reactivity of α‐alkylidene carbonates is dictated by ...

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Biodegradable polycarbonates containing side carboxyl groups—synthesis, properties, and degradation study

15-Jun-2017 | Joanna Jaworska, Michal Kawalec, Malgorzata Pastusiak, Katarzyna Reczynska, Henryk Janeczek, Kamila Lewicka, Elzbiet ..., Journal of Polymer Science Part A: Polymer Chemistry, 2017

ABSTRACT The main objective of the presented research was to synthesise biodegradable aliphatic polycarbonates containing reactive carboxyl pendant groups and to examine the influence of the copolymer chain microstructure and composition on the process of their hydrolytic degradation and ...

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Sustainable bisphenols from renewable softwood lignin feedstock for polycarbonates and cyanate ester resins

02-May-2017 | Steven-Friso Koelewijn; Sander Van den Bosch; Tom Renders; Wouter Schutyser; Bert Lagrain; Mario Smet; Joice Thomas; ..., Green Chemistry, 2017

Selective reductive catalytic depolymerisation of softwood lignin (e.g. pine, spruce) yields predominantly 4-n-propylguaiacol (4PG; 15-20 wt% on lignin basis), an interesting platform chemical for bio-based chemistry. This contribution specifically shows promising technical, sustainable and ...

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Halogen-Mediated Conversion of Hydrocarbons to Commodities

02-Feb-2017 | Ronghe Lin; Amol P. Amrute; Javier Pérez-Ramírez, Chemical Reviews, 2017

Halogen chemistry plays a central role in the industrial manufacture of various important chemicals, pharmaceuticals, and polymers. It involves the reaction of halogens or halides with hydrocarbons, leading to intermediate compounds which are readily converted to valuable commodities. These ...

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