scholarly journals Cubane Cu4I4(phosphine)4 Complexes as New Co-initiator for Free Radical Photopolymerization: Towards Aromatic Amine-Free Systems

2021 ◽  
Author(s):  
Jacques Lalevée ◽  
Fatima Hammoud ◽  
Mahmoud Rahal ◽  
Julien Egly ◽  
Fabrice Morlet-Savary ◽  
...  
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Aromatic Amine ◽  
Free Radical Polymerization ◽  
Copper Iodide ◽  
Free Radical Photopolymerization ◽  
Acrylate Monomers ◽  
First Time

The investigation of copper-iodide cubane derivatives as new co-initiators for the free radical polymerization (FRP) of acrylate monomers under mild irradiation conditions is described for the first time here. These...

Free-radical polymerization of monomer-polymer solutions initiated by a peroxide-tertiary aromatic amine system

2006 ◽  
Vol 48 (7) ◽  
pp. 707-711 ◽  
Author(s):  
I. A. Novakov ◽  
Ya. S. Vygodskii ◽  
M. A. Vaniev ◽  
T. V. Volkova ◽  
V. A. Lukasik ◽  
...  
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Aromatic Amine ◽  
Polymer Solutions ◽  
Free Radical Polymerization ◽  
Amine System

scholarly journals Novel Multifunctional Epoxy (Meth)acrylate Resins and Coatings Preparation via Cationic and Free-Radical Photopolymerization

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1718
Author(s):  
Paulina Bednarczyk ◽  
Izabela Irska ◽  
Konrad Gziut ◽  
Paula Ossowicz-Rupniewska
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Ring Opening ◽  
Free Radical Polymerization ◽  
Matter Content ◽  
Polymer Chains ◽  
Rate Coefficients ◽  
Structural Factors ◽  
Yellowness Index ◽  
Free Radical Photopolymerization

In this work, a series of novel multifunctional epoxy (meth)acrylate resins based on a low-viscosity aliphatic triepoxide triglycidyl ether of trimethylolethane (TMETGE) and acrylic acid (AA) or methacrylic acid (MMA) have been synthesized. Thanks to the performed modification, the obtained prepolymers have both epoxides as well as carbon–carbon double bonds and differ in their amount. The obtained results indicate that the carboxyl-epoxide addition esterification occurs in the presence of a catalyst (triphenylphosphine) at a temperature of 90 °C, whilst the required degree of conversion can be achieved simply by varying both the reagents ratio and reaction time. The structure of synthesized copolymers was confirmed by spectroscopic analyses (FT-IR, 1H NMR, 13C NMR) and studied regarding its nonvolatile matter content (NV), acid value (PAVs), as well as its epoxy equivalent value (EE). Due to the presence of both epoxy and double carbon–carbon pendant groups, one can apply two distinct mechanisms: (i) cationic ring-opening polymerization or (ii) free-radical polymerization to crosslink polymer chains. Synthesized epoxy (meth)acrylate prepolymers were further employed to formulate photocurable coating compositions. Hence, when cationic photoinitiators were applied, polyether-type polymer chains with pending acrylate or methacrylate groups were formed. In the case of free-radical polymerization, epoxy (meth)acrylates certainly formed a poly(meth)acrylate backbone with pending epoxy groups. Further, photopolymerization behavior and properties of cured coatings were investigated regarding some structural factors and parameters. Moreover, reaction rate coefficients of photo-cross-linking by both cationic ring-opening and free-radical photopolymerization of the received epoxy (meth)acrylate resins were determined via real-time infrared spectroscopy (RT-IR). Lastly, basic physicomechanical properties, such as tack-free time, hardness, adhesion, gloss, and yellowness index of cured coatings, were evaluated.

Tertiary Aromatic Amine Accelerators with Molecular Weights Above 400

1972 ◽  
Vol 51 (2) ◽  
pp. 473-482 ◽  
Author(s):  
R.L. Bowen ◽  
H. Argentar
Keyword(s):  
Free Radical ◽  
Nitrogen Atom ◽  
Radical Polymerization ◽  
Aromatic Ring ◽  
Aromatic Amine ◽  
Aromatic Amines ◽  
Free Radical Polymerization ◽  
Molecular Weights ◽  
Rate Of Polymerization

With the proper ring substituents, tertiary aromatic amines with large substituents on the nitrogen atom can be effective accelerators in free radical polymerization. Resistance to discoloration appears to be primarily a function of the substituents on the aromatic ring of the amine, whereas the rate of polymerization is dependent on both the alkyl substituents on the ring and the groups attached to the nitrogen atom.

scholarly journals Insertion of Degradable Thioester Linkages into Styrene and Methacrylate Polymers

2022 ◽  
Author(s):  
Matthew Rix ◽  
Samuel Higgs ◽  
Eleanor Dodd ◽  
Simon Coles ◽  
Nathaniel Bingham ◽  
...  
Keyword(s):  
Free Radical ◽  
Uniform Distribution ◽  
Radical Polymerization ◽  
Degradation Product ◽  
Free Radical Polymerization ◽  
Butyl Methacrylate ◽  
Ether Cleavage ◽  
Tert Butyl ◽  
Methacrylate Polymers ◽  
First Time

The thionolactone 3,3-dimethyl-2,3-dihydro-5H-benzo[e][1,4]dioxepine-5-thione (DBT) is shown to homopolymerize and, for the first time, copolymerize with styrene and methacrylates, introducing degradable thioester backbone functionality. The rapid copolymerization with styrene was exploited to produce copolymers through free-radical polymerization in a starve-fed semi-batch setup. The copolymerization of DBT with tert-butyl methacrylate under RAFT conditions was hypothesized to involve selective retardation of DBT-terminal chains that led to a more uniform distribution of degradable thioester linkages between chains. Surprisingly, the aminolysis of DBT homopolymers was accompanied by the intramolecular ether cleavage within the primary degradation product leading to the formation of 2,2-dimethylthiirane and salic-ylamides.

scholarly journals Chemo-Enzymatic Synthesis and Free Radical Polymerization of Renewable Acrylate Monomers from Cellulose-Based Lactones

2018 ◽  
Vol 6 (12) ◽  
pp. 17284-17293 ◽  
Author(s):  
Florian Diot-Néant ◽  
Enita Rastoder ◽  
Stephen A. Miller ◽  
Florent Allais
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Enzymatic Synthesis ◽  
Free Radical Polymerization ◽  
Acrylate Monomers

Non-isothermal Kinetics of Free Radical Polymerization of 2-Phenylethyl (Meth)acrylate

2018 ◽  
Vol 8 (3) ◽  
pp. 585-594
Author(s):  
Khdbudin Mulani ◽  
Ravindra Ghorpade ◽  
Surendra Ponrathnam ◽  
Nayaku Chavan ◽  
Kamini Donde
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Free Radical Polymerization ◽  
Isothermal Kinetics ◽  
Kinetics Of

Critically evaluated rate coefficients for free-radical polymerization, 3. Propagation rate coefficients for alkyl methacrylates

2000 ◽  
Vol 201 (12) ◽  
pp. 1355-1364 ◽  
Author(s):  
Sabine Beuermann ◽  
Michael Buback ◽  
Thomas P. Davis ◽  
Robert G. Gilbert ◽  
Robin A. Hutchinson ◽  
...  
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Free Radical Polymerization ◽  
Propagation Rate ◽  
Rate Coefficients ◽  
Alkyl Methacrylates

Oxygen-Initiated Free-Radical Polymerization of Alkyl Acrylates at High Temperatures

2021 ◽  
Author(s):  
Shi Liu ◽  
Lauren Chua ◽  
Ahmad Arabi Shamsabadi ◽  
Patrick Corcoran ◽  
Abhirup Patra ◽  
...  
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
High Temperatures ◽  
Free Radical Polymerization ◽  
Alkyl Acrylates
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