Synthesis and Homopolymerization of the Olefin- Derived Acrylic Monomer, 1-Methyl-1-Propyl-Hexyl Acrylate

e-Polymers ◽  
2006 ◽  
Vol 6 (1) ◽  
Author(s):  
Siyabonga Mange ◽  
Matthew P. Tonge ◽  
Ronald D. Sanderson
Keyword(s):  
Free Radical ◽  
Room Temperature ◽  
Kinetic Studies ◽  
High Conversion ◽  
Thermally Stable ◽  
Acrylate Monomer ◽  
Acrylic Monomer

AbstractThe synthesis of a new olefin-derived acrylate monomer, 1-methyl-1-propylhexyl acrylate (1-MPHA), starting from 1-pentene, is reported. 1-MPHA was found to be polymerizable to high conversion by conventional free radical means. Homopolymerization of the monomer in benzene and toluene progressed faster in toluene than in bulk. Kinetic studies show 1-MPHA to be a relatively slow reacting monomer. The homopolymer of 1-MPHA was found to be thermally stable to about 200 °C, and soft at room temperature, with a Tg of -43 °C.

Investigation of the V4+-Centre in 6H- and 4H-SIC by the Method of Spectral-Hole Burning

1998 ◽  
Vol 512 ◽  
Author(s):  
C. Hecht ◽  
R. Kummer ◽  
A. Winnacker
Keyword(s):  
Electronic Properties ◽  
Room Temperature ◽  
Hole Burning ◽  
Band Offset ◽  
Spectral Hole Burning ◽  
Type Ii ◽  
Thermally Stable ◽  
Spectral Hole

ABSTRACTIn the context of spectral-hole burning experiments in 4H- and 6H-SiC doped with vanadium the energy positions of the V4+/5+ level in both polytypes were determined in order to resolve discrepancies in literature. From these numbers the band offset of 6H/4H-SiC is calculated by using the Langer-Heinrich rule, and found to be of staggered type II. Furthermore the experiments show that thermally stable electronic traps exist in both polytypes at room temperature and considerably above, which may result in longtime transient shifts of electronic properties.

K2S2O8 activation by glucose at room temperature for synthesis and functionalization of heterocycles in water

2021 ◽  
Author(s):  
Joydev K. Laha ◽  
Mandeep Kaur Hunjan
Keyword(s):  
Organic Synthesis ◽  
Radical Anion ◽  
Room Temperature ◽  
Kinetic Studies ◽  
Sulfate Radical ◽  
Persulfate Activation ◽  
Sulfate Radical Anion

While persulfate activation at room temperature using glucose is primarily focused on kinetic studies of sulfate radical anion, utilization of this protocol in organic synthesis is rarely demonstrated. We reinvestigated...

Alkene Difunctionalization Directed by Free Amines: Diamine Synthesis via Nickel-Catalyzed 1,2-Carboamination

2021 ◽  
Author(s):  
Taeho Kang ◽  
José Manuel González ◽  
Zi-Qi Li ◽  
Klement Foo ◽  
Peter Cheng ◽  
...  
Keyword(s):  
Nickel Catalyst ◽  
Room Temperature ◽  
Kinetic Studies ◽  
Fine Tuning ◽  
Secondary Amines ◽  
Protecting Group ◽  
Wide Range ◽  
Leaving Group ◽  
Primary And Secondary Amines ◽  
Reaction Proceeds

A versatile method to access differentially substituted 1,3- and 1,4-diamines via a nickel-catalyzed three-component 1,2-carboamination of alkenyl amines with aryl/alkenylboronic ester nucleophiles and N–O electrophiles is reported. The reaction proceeds efficiently with free primary and secondary amines without needing a directing auxiliary or protecting group, and is enabled by fine-tuning the leaving group on the N–O reagent. The transformation is highly regioselective and compatible with a wide range of coupling partners and alkenyl amine substrates, all performed at room temperature. A series of kinetic studies support a mechanism in which alkene coordination to the nickel catalyst is turnover-limiting.

Aqueous free-radical polymerization of PEGMEMA macromer: kinetic studies via an on-line 1H NMR technique

2012 ◽  
Vol 21 (10) ◽  
pp. 683-688 ◽  
Author(s):  
Vahid Najafi ◽  
Farshid Ziaee ◽  
Kourosh Kabiri ◽  
Mohammad Jalal Zohouriaan Mehr ◽  
Hossein Abdollahi ◽  
...  
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
1H Nmr ◽  
Free Radical Polymerization ◽  
Kinetic Studies ◽  
On Line

scholarly journals SINTESIS CALKON ((E)-1,3-DI(NAPHTHALEN-2-YL)PROP-2-EN-1-ONE) DAN AKTIVITASNYA SEBAGAI ANTIOKSIDAN

2012 ◽  
Vol 3 (1) ◽  
pp. 7-14
Author(s):  
Rahmiwati Hilma ◽  
Jasril ◽  
Hilwan Yuda Teruna
Keyword(s):  
Free Radical ◽  
Melting Point ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Room Temperature ◽  
Intermediate Compound ◽  
Alkaline Condition ◽  
Point Measurement ◽  
Anti Inflammatory ◽  
Layer Chromatography

Study on chalcone calkon (E)-1,3-di(naphthalen-2-yl)prop-2-en-1-one synthesis have been carried out with stirrer methode. These compounds can be used as intermediate compound to synthesize others compounds which was reported having antimicrobial, anti-inflammatory, anti-depressant, anti-tumour. The of chalcones synthesis vatives were reported in acid and alkali condition. In this study, chalcone and its derivates were synthesized by using stirrer method in alkaline condition in room temperature. the compounds subjected to somes analyses including melting point measurement, thin layer chromatography and HPLC. Scavenging free radical by using DPPH methode showed Scavenging free radical with LC50 >80 μg/ml min potent activity while the ascorbat acid LC50 89,79 μg/ml.

Blue Light Driven Free-Radical Polymerization using Arylazo Sulfones as Initiators

2021 ◽  
Author(s):  
Andrea Nitti ◽  
Angelo Martinelli ◽  
Fabrice Batteux ◽  
Stefano Protti ◽  
Maurizio Fagnoni ◽  
...  
Keyword(s):  
Free Radical ◽  
Visible Light ◽  
Radical Polymerization ◽  
Blue Light ◽  
Room Temperature ◽  
Free Radical Polymerization

The polymerization of a broad range of electron-poor olefins has been achieved under free-radical conditions by using arylazo sulfones as visible light photoinitiators. The process proceeds smoothly at room temperature...

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