Results 121 to 130 of about 6,260 (167)

Arborescent Graft Polybutadienes

Macromolecules, 1997
Cascade-branched, “graft on graft” polybutadienes, denoted arborescent graft polymers, were prepared by hydrosilylation of polybutadiene vinyl groups with chlorodimethylsilane, followed by grafting with living polybutadiene chains. Repeated hydrosilylation−anionic grafting cycles led to a treelike outward growth, yielding well-defined, spherically ...
Hempenius, Mark A., Michelberger, W., Moller, M.   +2 more
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Relaxation transitions in polybutadiene and in polybutadiene-methylstyrenes

Polymer Science U.S.S.R., 1987
Abstract The relaxation transitions in polybutadiene and in its copolymers with methylstyrene were studied by the methods of mechanical relaxation in the range −150–+350°. In this range, up to seventeen transitions of various nature were observed, most of them connected with the butadiene component in the copolymers.
G.M. Bartenev, V.V. Tulinova
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Atomistic Monte Carlo Simulation of Polybutadiene Isomers:  cis-1,4-Polybutadiene and 1,2-Polybutadiene

Macromolecules, 2003
Atomistic simulations of two isomers of polybutadiene (PB), cis-1,4-PB and 1,2-PB, have been conducted using the end-bridging Monte Carlo algorithm.
P. Gestoso, E. Nicol, M. Doxastakis, D. N. Theodorou   +3 more
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Diffusion and sorption of benzene vapor through polybutadiene‐, polybutadiene/styrene‐, and polybutadiene/acrylonitrile‐based polyurethanes

Journal of Applied Polymer Science, 2004
AbstractA series of polyurethane (PU) films made from toluene diisocyanate (TDI), 1,4‐butanediol (BDO), and hydroxyl‐terminated polybutadiene (HTPB), hydroxyl terminated polybutadiene/styrene (HTBS), or hydroxyl terminated polybutadiene/acrylonitrile (HTBN) was synthesized by solution polymerization.
Yurun Yang, Yongmin Huang, Yonglin Chen, Dening Wang, Honglai Liu, Chunpu Hu   +5 more
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Crosslink density in polybutadiene

Journal of Polymer Science, 1958
AbstractThe crosslink density in polybutadiene has been determined by measurement of the polymer molecular weight by osmometry and the primary chain molecular weight by modifier analysis involving radioactive materials. Since the number of polymer molecules is equal to the number of primary chains less the number of crosslinkages, the experimental ...
L. H. Howland, A. Nisonoff, L. E. Dannals, V. S. Chambers   +3 more
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Sorption and diffusion of ethanol vapor in polybutadiene/acrylonitrile, polybutadiene/styrene and polybutadiene based polyurethanes

European Polymer Journal, 2004
The sorption and diffusion behavior of ethanol vapor in series of polyolefine based polyurethanes (PU) made from hydroxyl-terminated polybutadiene/acrylonitrile (HTBN), hydroxyl-terminated polybutadiene/styrene (HTBS) and hydroxyl-terminated polybutadiene (HTPB) were investigated by using the quartz-spring, DSC, FTIR and AFM. The equilibrium absorption
Yurun Yang, Yongmin Huang, Dening Wang, Honglai Liu, Chunpu Hu   +4 more
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Kurzkettige, lineare polybutadiene

Die Angewandte Makromolekulare Chemie, 1971
AbstractMit ZIEGLER‐NATTA‐Katalysatoren aus Alkylaluminiumchloriden in Kombnination mit Kobalt‐ und/oder Nickelverbindungen können in einem nahtlosen Übergang 1,4‐cis‐Polybutadiene mit Molekulargewichten von 500 000 und mehr bis zusolchen mit Molekulargewichtenn von etwa 500 hergestellt werden.
Von Bernhard Schleimer, Heinrich Weber
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Phase Behavior of Polystyrene/Polybutadiene and Polystyrene/Hydrogenated Polybutadiene Mixtures:  Effect of the Microstructure of Polybutadiene

Macromolecules, 1998
The effect of the microstructure on the phase behavior of mixtures of polybutadiene (PB) and poly(ethylene-co-1-butene) (PEB) with polystyrene (PS) has been investigated. A series of PBs with 1,2-addition content ranging from 7 to 93% were synthesized by anionic polymerization, and a portion of each was subsequently hydrogenated to yield PEB.
Chang Dae Han, Seung Bum Chun, Stephen F. Hahn, Scott Q. Harper, Philip J. Savickas, David M. Meunier, Liang Li, Talat Yalcin   +7 more
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Silane-Modified Polybutadienes

The Journal of Adhesion, 1972
Abstract This work had as an objective the development of polymeric coupling agents by introduction of silane groups into liquid polybutadienes of high vinyl content. A fraction of the pendant vinyl groups were converted to organic silane moieties by addition of monomeric silane to the double bond.
Jerry Miron, Pradip Bhatt, Irving Skeist
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Near‐IR spectrum of polybutadiene

Journal of Polymer Science Part A: Polymer Chemistry, 1996
Abstract : The vibrational overtone spectrum of polybutadiene was recorded up to 14,000/cm and interpreted in the local mode model. The methylenic and olefinic CH stretch progressions, with anharmonicities of 66 and 59/cm, respectively, were identified for delta v = 2, 3,4 and 5.
D. L. Snavely, C. Angevine
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