Utilization of a Kinetic Principle of the Sequence-Controlled Anionic Copolymerization of Isocyanates toward Polyisocyanate Copolymers Encoded with Multiple Monomer Sequences

2019 ◽  
Vol 52 (9) ◽  
pp. 3530-3542 ◽  
Author(s):  
Chang-Geun Chae ◽  
In-Gyu Bak ◽  
Jae-Suk Lee
Keyword(s):  
Kinetic Principle ◽  
Anionic Copolymerization

scholarly journals Sustainable Myrcene-Based Elastomers via a Convenient Anionic Polymerization

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 838
Author(s):  
David Hermann Lamparelli ◽  
Magdalena Maria Kleybolte ◽  
Malte Winnacker ◽  
Carmine Capacchione
Keyword(s):  
Anionic Polymerization ◽  
Sodium Hydride ◽  
Reactivity Ratios ◽  
Molecular Weights ◽  
Styrene Copolymers ◽  
Wide Range ◽  
Elastomeric Materials ◽  
Complete Study ◽  
Anionic Copolymerization ◽  
Trialkylaluminum Derivatives

Soluble heterocomplexes consisting of sodium hydride in combination with trialkylaluminum derivatives have been used as anionic initiating systems at 100 °C in toluene for convenient homo-, co- and ter-polymerization of myrcene with styrene and isoprene. In this way it has been possible to obtain elastomeric materials in a wide range of compositions with interesting thermal profiles and different polymeric architectures by simply modulating the alimentation feed and the (monomers)/(initiator systems) ratio. Especially, a complete study of the myrcene-styrene copolymers (PMS) was carried out, highlighting their tapered microstructures with high molecular weights (up to 159.8 KDa) and a single glass transition temperature. For PMS copolymer reactivity ratios, rmyr = 0.12 ± 0.003 and rsty = 3.18 ± 0.65 and rmyr = 0.10 ± 0.004 and rsty = 3.32 ± 0.68 were determined according to the Kelen–Tudos (KT) and extended Kelen–Tudos (exKT) methods, respectively. Finally, this study showed an easy accessible approach for the production of various elastomers by anionic copolymerization of renewable terpenes, such as myrcene, with commodities.

scholarly journals Polymerization of β-Cyanopropionaldehyde. VIII. Anionic Copolymerization with Dimethylketene

1970 ◽  
Vol 1 (2) ◽  
pp. 190-197 ◽  
Author(s):  
Kazuhiko Hashimoto ◽  
Hiroshi Sumitomo
Keyword(s):  
Anionic Copolymerization

Anionic copolymerization of butadiene and styryl-terminated polystyrene macromonomers

1990 ◽  
Vol 24 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Manfred Arnold ◽  
Willy Frank ◽  
G�nther Reinhold
Keyword(s):  
Anionic Copolymerization

On the Sufficiency of the Principle of Virtual Work for Mechanical Equilibrium: A Critical Reexamination

1989 ◽  
Vol 56 (3) ◽  
pp. 704-707 ◽  
Author(s):  
John G. Papastavridis
Keyword(s):  
Virtual Work ◽  
Mechanical Equilibrium ◽  
Principle Of Virtual Work ◽  
Holonomic Constraints ◽  
Kinetic Principle ◽  
Sufficiency Conditions

Starting from the general kinetic principle of d’Alembert/Lagrange, an energetic proof of the sufficiency conditions for equilibrium (known as Principle of Virtual Work) is presented. It is clearly demonstrated why to maintain equilibrium requires that, in addition to the familiar vanishing of the virtual work of the impressed forces on the originally motionless system, its geometrical (holonomic) constraints be explicitly time independent (stationary) and its nonintegrable kinematical (nonholonomic) ones be linear and homogeneous in the generalized velocities (catastatic).

scholarly journals The Effect of Nonequilibrium Structure State on the Creep and Superplastic Behaviour of Materials

2008 ◽  
Vol 575-578 ◽  
pp. 1031-1037
Author(s):  
M.M. Myshlyaev
Keyword(s):  
Mechanical Behaviour ◽  
Coarse Grain ◽  
Zinc Alloy ◽  
Cobalt Alloy ◽  
Superplastic Behaviour ◽  
Fine Grain ◽  
Grain Zinc ◽  
Nonequilibrium Structure ◽  
Structure State ◽  
Kinetic Principle

Mechanical behaviour at creep and superplasticity of coarse grain and monocrystalline aluminum under torsion, of coarse grain molybdenum, of fine grain zinc alloy and amorphous cobalt alloy under tension are discussed from unified positions. It is shown that realization of their superplasticity requires fulfillment of structure-kinetic principle.

Anionic copolymerization of bicyclic bis(.gamma.-lactones) with epoxides and volume change during the copolymerization

1993 ◽  
Vol 26 (24) ◽  
pp. 6686-6687 ◽  
Author(s):  
Toshikazu Takata ◽  
Keunwo Chung ◽  
Atsuhito Tadokoro ◽  
Takeshi Endo
Keyword(s):  
Volume Change ◽  
Anionic Copolymerization

Reactivity ratios for the anionic copolymerization of ethylene oxide and butylene oxide in bulk

1993 ◽  
Vol 29 (2-3) ◽  
pp. 281-286 ◽  
Author(s):  
Stewart Dickson ◽  
Ga-Er Yu ◽  
Frank Heatley ◽  
Colin Booth
Keyword(s):  
Ethylene Oxide ◽  
Reactivity Ratios ◽  
Anionic Copolymerization

Fast Access to Amphiphilic Multiblock Architectures by the Anionic Copolymerization of Aziridines and Ethylene Oxide

2018 ◽  
Vol 140 (41) ◽  
pp. 13407-13412 ◽  
Author(s):  
Tassilo Gleede ◽  
Elisabeth Rieger ◽  
Jan Blankenburg ◽  
Katja Klein ◽  
Frederik R. Wurm
Keyword(s):  
Ethylene Oxide ◽  
Anionic Copolymerization ◽  
Fast Access

Anionic Copolymerization of Butadiene and Isoprene with Organolithium Initiators in Hexane

1981 ◽  
pp. 529-555 ◽  
Author(s):  
I.-C. WANG ◽  
Y. MOHAJER ◽  
T. C. WARD ◽  
G. L. WILKES ◽  
JAMES E. McGRATH
Keyword(s):  
Anionic Copolymerization
Sign in / Sign up

Export Citation Format

Share Document