Synthesis and Characterization of Poly(allyl methacrylate) Obtained by Free Radical Initiator

2008 ◽  
Vol 45 (4) ◽  
pp. 302-311 ◽  
Author(s):  
Tuğba Kantav Vardareli˙ ◽  
Selda Keski˙n ◽  
Ali˙ Usanmaz
Keyword(s):  
Free Radical ◽  
Synthesis And Characterization ◽  
Radical Initiator ◽  
Free Radical Initiator ◽  
Allyl Methacrylate

Synthesis and characterization of a polyester/styrene resin obtained by frontal polymerization

e-Polymers ◽  
2002 ◽  
Vol 2 (1) ◽  
Author(s):  
Stefano Fiori ◽  
Giulio Malucelli ◽  
Alberto Mariani ◽  
Laura Ricco ◽  
Elena Casazza
Keyword(s):  
Free Radical ◽  
Mechanical Behaviour ◽  
Unsaturated Polyester ◽  
Front Velocity ◽  
Frontal Polymerization ◽  
Maximum Temperature ◽  
Synthesis And Characterization ◽  
Free Radical Initiator ◽  
First Time

AbstractThe frontal polymerization technique has been successfully applied, for the first time, to obtain an unsaturated polyester/styrene resin. The effect of the ratio of the two aforementioned components, as well as of the type and amount of free-radical initiator on both front velocity and maximum temperature reached by the front, has been thoroughly studied. The resulting products have been characterized in terms of their thermal and dynamic-mechanical behaviour. A comparison of such products with the corresponding materials obtained by the classical batch polymerization technique has evidenced that frontal polymerization allows to reach a higher degree of crosslinking with respect to batch copolymerization and hence a better thermal and mechanical behaviour.

scholarly journals Synthesis and Characterization of Some New Thermal Stable Polymers - Polymerization of N-[4-N´ -(Benzylamino-carbonyl)phenyl]maleimide

2007 ◽  
Vol 4 (2) ◽  
pp. 222-231 ◽  
Author(s):  
B. L. Hiran ◽  
Jyoti Chadhary ◽  
S. N. Paliwal ◽  
Suresh Meena ◽  
P. R. Chaudhary
Keyword(s):  
Free Radical ◽  
Thermo Gravimetric Analysis ◽  
Radical Copolymerization ◽  
Synthesis And Characterization ◽  
Gravimetric Analysis ◽  
Thermo Gravimetric ◽  
H Nmr ◽  
Free Radical Initiator ◽  
Ft Ir

This article describes the synthesis and characterization of homopolymer (H-BCPM) of N-[4-N'-(benzylamino-carbonyl) phenyl] maleimide (N-BACPMI) and copolymer (C-BCPM) of N-BACPMI withn-butyl acrylate (BA). The new monomer was synthesized fromp-aminobenzoic acid, maleic anhydride and benzylamine. The homopolymerization of N-BACPMI is initiated by free radical using AIBN in THF solvent at 65°C. Radical copolymerization of N-BACPMI with BA, initiated by AIBN, was performed in THF solvent using equimolar amount. Effect of the different free radical initiator AIBN, BPO and solventsp-Dioxane, THF, DMF and DMSO was studied. Homopolymer and Copolymer were characterized by intrinsic viscosity, solubility test, FT-IR,1H-NMR spectral analysis and elemental analysis. Thermal behaviour was studied by Thermo gravimetric analysis.

Preparation and characterization of a novel superabsorbent of konjac glucomannan-poly(acrylic acid) with trimethylolpropane trimethacrylate cross-linker

RSC Advances ◽  
2015 ◽  
Vol 5 (48) ◽  
pp. 38417-38423 ◽  
Author(s):  
Jianfu Chen ◽  
Weiying Zhang ◽  
Xiao Li
Keyword(s):  
Free Radical ◽  
Acrylic Acid ◽  
Crosslinking Agent ◽  
Konjac Glucomannan ◽  
Potassium Persulfate ◽  
Solution Polymerization ◽  
Radical Initiator ◽  
Free Radical Initiator ◽  
Cross Linker

A novel superabsorbent was prepared by the solution polymerization of partially neutralized acrylic acid onto konjac glucomannan using potassium persulfate as a free radical initiator and trimethylolpropane trimethacrylate as a crosslinking agent.

Synthesis and Characterization of Some Novel Homo- and Hetero-Diradicals of Hydrazyl and Nitroxide Type

2007 ◽  
Vol 60 (3) ◽  
pp. 173 ◽  
Author(s):  
Petre Ionita ◽  
Floriana Tuna ◽  
Marius Andruh ◽  
Titus Constantinescu ◽  
Alexandru T. Balaban
Keyword(s):  
Free Radical ◽  
Potassium Permanganate ◽  
Lead Dioxide ◽  
Magnetic Behaviour ◽  
Synthesis And Characterization ◽  
Stable Free Radical ◽  
Ms Analysis ◽  
New Compounds

Starting from the well known stable free radical 2,2-diphenyl-1-picrylhydrazyl (DPPH; 2a) and its congener 2,2-diphenyl-1-(4-cyano-2,6-dinitrophenyl)hydrazyl 2b, or from their reduced hydrazine counterparts 1a,b, it was possible to obtain the p-quinonoid compounds 4a,b by oxidation with ceric (Ce4+) sulfate, which by reduction gave the corresponding hydroxyl derivatives 2-phenyl-2-(4-hydroxyphenyl)-1-picrylhydrazine 5a or 2-phenyl-2-(4-hydroxyphenyl)-1-(4-cyano-2,6-dinitrophenyl)hydrazine 5b. These hydroxyl derivatives (5a,b) react with 4-carboxy-TEMPO or 2,2-diphenyl-1-(4-carboxy-2,6-dinitrophenyl)hydrazine to form the corresponding esters 6a,b or 8a,b. These esters (6a,b and 8a,b) lead to the hybrid hetero diradicals (nitroxide–hydrazyl type) 7a,b or homo biradicals (hydrazyl–hydrazyl type) 9a,b by oxidation with lead dioxide or potassium permanganate. The new compounds were characterized by UV-vis, NMR, EPR, and MS analysis, and their magnetic behaviour was investigated.

PNIPAM-based graft copolymers prepared using potassium persulfate as free-radical initiator: synthesis reproducibility

2016 ◽  
Vol 294 (6) ◽  
pp. 981-991 ◽  
Author(s):  
Nívia N. Marques ◽  
Bruna V. Lima ◽  
Valdelice R. Silveira ◽  
Bruna L. B. Lima ◽  
Ana M. S. Maia ◽  
...  
Keyword(s):  
Free Radical ◽  
Graft Copolymers ◽  
Potassium Persulfate ◽  
Radical Initiator ◽  
Free Radical Initiator

Synthesis and characterization of hyperbranched associative polyacrylamide

RSC Advances ◽  
2016 ◽  
Vol 6 (45) ◽  
pp. 39522-39529 ◽  
Author(s):  
Wanfen Pu ◽  
Daijun Du ◽  
Rui Liu ◽  
Jiongyi Gu ◽  
Kewei Li ◽  
...  
Keyword(s):  
Free Radical ◽  
Radical Copolymerization ◽  
Synthesis And Characterization ◽  
Functional Monomer ◽  
Free Radical Copolymerization ◽  
Ultrafine Silica ◽  
Hyperbranched Polyamide

HDPAM was synthesized by water free-radical copolymerization based on functional hyperbranched polyamide-modified ultrafine silica as functional monomer.

Polymerization of Diphenylbutadiyne Derivatives in Solution by Free Radical Initiator

2007 ◽  
Vol 44 (6) ◽  
pp. 605-611 ◽  
Author(s):  
Miriam F. Beristain ◽  
Eduardo Muñoz ◽  
Takeshi Ogawa
Keyword(s):  
Free Radical ◽  
Radical Initiator ◽  
Free Radical Initiator
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