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   Articles with "controlled ring" as a keyword



Research Progress in Polypeptoids Prepared by Controlled Ring-Opening Polymerizations.

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recommendations! Published in 2022 at "Macromolecular rapid communications"

DOI: 10.1002/marc.202200301

Abstract: Polypeptoids, structural mimics of polypeptides, have attracted considerable attention due to their biocompatibility, proteolytic stability, thermal processability, good solubility, synthetic accessibility, and structural diversity. Polypeptoids have emerged as an interesting material in both polymer science… read more here.

Keywords: progress polypeptoids; prepared controlled; polypeptoids prepared; controlled ring ... See more keywords

Ultrafast and Controlled Ring-Opening Polymerization with Sterically Hindered Strong Bases

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recommendations! Published in 2020 at "Macromolecules"

DOI: 10.1021/acs.macromol.0c01571

Abstract: The controlled anionic ring-opening polymerization of lactones and siloxanes is carried out in continuous-flow reactors. Anionic ring-opening polymerization of cyclic esters with strong, soluble ba... read more here.

Keywords: ring opening; opening polymerization; polymerization sterically; controlled ring ... See more keywords

Fast and Controlled Ring-Opening Polymerization of Cyclic Esters by Alkoxides and Cyclic Amides

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recommendations! Published in 2018 at "Macromolecules"

DOI: 10.1021/acs.macromol.7b02697

Abstract: Ring-opening polymerization is a powerful method for the synthesis of biodegradable and biorenewable polyesters. In this contribution, we report that the combination of alkali alkoxides and commercially available cyclic amides catalyzes fast and controlled ring-opening… read more here.

Keywords: fast controlled; ring opening; opening polymerization; controlled ring ... See more keywords

Catalytically Controlled Ring-Opening Polymerization of 2-Oxo-15-crown-5 for Degradable and Recyclable PEG-Like Polyesters.

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recommendations! Published in 2022 at "ACS macro letters"

DOI: 10.1021/acsmacrolett.2c00210

Abstract: Poly(ethylene glycol) (PEG) has been extensively used in diverse applications. However, it is not biodegradable and shows abnormal immune responses. Herein, a fast, controlled, ring-opening polymerization (ROP) of 2-oxo-15-crown-5 (O-15C5) is reported to prepare well-defined… read more here.

Keywords: like polyesters; oxo crown; opening polymerization; controlled ring ... See more keywords
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Organic Acid Promoted Controlled Ring-Opening Polymerization of α-Amino Acid-Derived N-thiocarboxyanhydrides (NTAs) toward Well-defined Polypeptides

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recommendations! Published in 2018 at "ACS Macro Letters"

DOI: 10.1021/acsmacrolett.8b00743

Abstract: Weak organic acids (i.e., acetic acid) in conjunction with primary amine initiators have enabled controlled ring-opening polymerization of α-amino-acid derived N-thiocarboxyanhydrides (NTAs) bearing N–H proton in a polar solvent (CH2Cl2) at room temperature, producing well-defined… read more here.

Keywords: ring opening; amino; polymerization; opening polymerization ... See more keywords

Highly thermally stable and robust enantiopure zirconium NNN-scorpionates for the controlled ring-opening polymerization of rac-lactide.

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recommendations! Published in 2017 at "Dalton transactions"

DOI: 10.1039/c7dt01050h

Abstract: A series of enantiopure alkoxide and thioalkoxide zirconium derivatives [Zr(ER)3(κ3-R,R-fbpza)] (1-6) (E = O, R = CHMe21, CHMeEt 2, CH2SiMe33, 2,6-C6H3Me24, 4-tBuPh 5; E = S, R = 4-tBuPh 6) has been prepared for use… read more here.

Keywords: rac lactide; ring opening; thermally stable; controlled ring ... See more keywords

Chemoselective and Controlled Ring-Opening Copolymerization of Biorenewable α-Methylene-δ-Valerolactone with ε-Caprolactone toward Functional Copolyesters

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recommendations! Published in 2023 at "Polymer Chemistry"

DOI: 10.1039/d3py00188a

Abstract: Although α-methylene-δ-valerolactone (MVL) as a biorenewable six membered lactone bearing an exocyclic double bond has shown great potential to prepare functional polyester with pendent modifiable vinyl group, the copolymerization of... read more here.

Keywords: methylene; methylene valerolactone; controlled ring; copolymerization ... See more keywords

A progressive phase multiple-injection locking technique for jitter suppression in voltage-controlled ring oscillator

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recommendations! Published in 2024 at "International Journal of Electronics"

DOI: 10.1080/00207217.2024.2408791

Abstract: ABSTRACT This paper presents a jitter reduction technique for a voltage-controlled ring oscillator (VCRO). This technique is useful in employing VCRO-based circuits like Analog to Digital Converter (ADC), Phase Locked Loop (PLL), and various time-based… read more here.

Keywords: voltage controlled; jitter; phase; controlled ring ... See more keywords