Synthesis and Glass Transition Behavior of High Molecular Weight Styrene/4-Acetoxystyene and Styrene/4-Hydroxystyrene Gradient Copolymers Made via Nitroxide-Mediated Controlled Radical Polymerization

2004 ◽  
Vol 37 (15) ◽  
pp. 5586-5595 ◽  
Author(s):  
Maisha K. Gray ◽  
Hongying Zhou ◽  
SonBinh T. Nguyen ◽  
John M. Torkelson
Keyword(s):  
Molecular Weight ◽  
Glass Transition ◽  
High Molecular Weight ◽  
Radical Polymerization ◽  
Controlled Radical Polymerization ◽  
Gradient Copolymers ◽  
Transition Behavior

Limitations in the Synthesis of High Molecular Weight Polymers via Nitroxide-Mediated Controlled Radical Polymerization:  Modeling Studies

2003 ◽  
Vol 36 (20) ◽  
pp. 7812-7823 ◽  
Author(s):  
Todd M. Kruse ◽  
Razima Souleimonova ◽  
Andrew Cho ◽  
Maisha K. Gray ◽  
John M. Torkelson ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Radical Polymerization ◽  
Controlled Radical Polymerization ◽  
High Molecular Weight Polymers ◽  
Modeling Studies

scholarly journals Synthesis of super high molecular weight copolymer of AM/NaA/AMPS by oxidation–reduction and controlled radical polymerization

2019 ◽  
Vol 17 (1) ◽  
pp. 242-254
Author(s):  
Ji Yan-feng ◽  
Cao Xu-long ◽  
Zhu Yang-wen ◽  
Xu Hui ◽  
Sun Xiu-zhi ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Radical Polymerization ◽  
Oil Recovery ◽  
Salt Resistance ◽  
Temperature Tolerance ◽  
Controlled Radical Polymerization ◽  
Force Microscopy ◽  
Oxidation Reduction ◽  
Hydrolyzed Polyacrylamide

AbstractSuper high molecular weight copolymers of AM/NaA/AMPS were prepared by oxidation–reduction [OR-P(AM/NaA/AMPS)] and controlled radical polymerization [CR-P(AM/NaA/AMPS)]. The resulting copolymers were fully characterized, and the reaction conditions for their preparation were optimized. OR-P(AM/NaA/AMPS), CR-P(AM/NaA/AMPS), and conventional partially hydrolyzed polyacrylamide (HPAM) in brine solution were comprehensively characterized by thermogravimetric analysis, scanning electron microscopy, atomic force microscopy, and dynamic light scattering. OR-P(AM/NaA/AMPS) and CR-P(AM/NaA/AMPS) containing AMPS monomer showed better salt resistance, temperature tolerance, and viscosification property than the conventional HPAM polymer, making them more promising for enhanced oil recovery. Through comprehensive comparison and analysis, it was found that OR-P(AM/NaA/AMPS) was more conducive for high-temperature condition due to the existence of xanthone in OR-P(AM/NaA/AMPS). On the other hand, CR-P(AM/NaA/AMPS) was more suitable for high-mineral atmosphere, which could be attributed to its higher intrinsic viscosity.

Stereo-chemical contributions to the glass transition and liquid–liquid phase separation in high molecular weight poly(N-vinyl carbazole)

RSC Advances ◽  
2016 ◽  
Vol 6 (35) ◽  
pp. 29326-29333 ◽  
Author(s):  
Abdul G. Al Lafi ◽  
James N. Hay
Keyword(s):  
Molecular Weight ◽  
Glass Transition ◽  
Phase Separation ◽  
Liquid Phase ◽  
High Molecular Weight ◽  
Structural Properties ◽  
Thermal History ◽  
Liquid Phase Separation ◽  
High Molecular Weight Poly ◽  
Liquid Liquid Phase Separation

Thermal history and purification effects on the structural properties of PVK were investigated. Liquid–liquid phase separation is suggested to occur by separation of isotactic rich segments from a matrix which is predominantly atactic.

Tertiary amine catalyzed photo-induced controlled radical polymerization of methacrylates

2015 ◽  
Vol 6 (30) ◽  
pp. 5362-5368 ◽  
Author(s):  
Qiang Fu ◽  
Thomas G. McKenzie ◽  
Shereen Tan ◽  
Eunhyung Nam ◽  
Greg G. Qiao
Keyword(s):  
Molecular Weight ◽  
Radical Polymerization ◽  
Uv Irradiation ◽  
Tertiary Amine ◽  
Controlled Radical Polymerization ◽  
Low Molecular Weight ◽  
Molecular Weight Distributions ◽  
Weight Distributions ◽  
End Group

A novel tertiary amine catalyst and trithiocarbonate synergistic photo-induced controlled radical polymerization of methacrylates has been realized under mild UV irradiation, yielding polymethacrylates with low molecular weight distributions and excellent end-group fidelity.

Synthesis of high-molecular-weight polyamine by radical polymerization ofN,N-diallyl-N-methylamine

2000 ◽  
Vol 49 (3) ◽  
pp. 431-437 ◽  
Author(s):  
Yu. A. Vasilieva ◽  
N. A. Kleshcheva ◽  
G. L. Gromova ◽  
A. I. Rebrov ◽  
M. P. Filatova ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Radical Polymerization
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