Results 191 to 200 of about 10,860 (230)
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2009
Abstract Major Applications With one chiral center, 1,2-polybutadiene can exist in the amorphous atactic form and two crystalline forms: isotactic and syndiotactic. In the formation of 1,2-polybutadiene, it is believed that the syn p-allyl form yields the syndiotactic structure, while the anti p-allyl form yields the isotactic structures.
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Abstract Major Applications With one chiral center, 1,2-polybutadiene can exist in the amorphous atactic form and two crystalline forms: isotactic and syndiotactic. In the formation of 1,2-polybutadiene, it is believed that the syn p-allyl form yields the syndiotactic structure, while the anti p-allyl form yields the isotactic structures.
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Cis‐trans isomerization in polybutadiene
Journal of Polymer Science, 1957Abstract About twenty years ago, in an effort to transform natural rubber into gutta-percha, Meyer and Ferri irradiated a solution of Hevea in cyclohexane with ultraviolet light, but were unable to detect any cis-trans isomerization in polyisoprene.
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INFRARED SPECTRA OF POLYBUTADIENES. NOTE I: SYNDIOTACTIC-1,2 POLYBUTADIENE
1967ABSTRACT The infrared spectrum of syndiotactic-1,2 polybutadiene was studied on polymer prepared by polymerization of butadiene with the aid of a catalyst based on triethyl aluminum and vanadium triacetylacetonate, and subsequent cold extraction with benzene.
D. MORERO, E. MANTICA, L. PORRI
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Sulfur Crosslinks in Polybutadiene Vulcanizates
Rubber Chemistry and Technology, 1968Abstract For the first time the crosslink terminus structure of monosulfide crosslinks and the amount of that structure in an elastomer vulcanizate has been determined directly from a sample of the vulcanizate. By measuring the rate of swelling of vulcanizates, immersed in either methyl iodide or methyl bromide, the rate of crosslink cleavage ...
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Tube renewal in the relaxation of 4-arm-star polybutadienes in linear polybutadienes
Macromolecules, 1987Polymere etoile dissous a faible concentration (
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2009
Abstract Major Applications Tire treads, carcass, belts, hoses, gaskets, seals, and protective coatings; component in other synthetic rubbers and blends. Properties of Special Interest Good low-temperature properties and adhesion to metals; good resilience, durability, and abrasion resistance.
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Abstract Major Applications Tire treads, carcass, belts, hoses, gaskets, seals, and protective coatings; component in other synthetic rubbers and blends. Properties of Special Interest Good low-temperature properties and adhesion to metals; good resilience, durability, and abrasion resistance.
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Modification of Polybutadiene by Transition Metal Catalysts: Hydroacylation of Polybutadiene
2000Chul-Ho Jun +3 more
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Accessible microstructures of polybutadiene by anionic polymerization
Polymer, 2018Stéphane Carlotti
exaly