Butadiene polymers, hydrogenation

In more recent work on hydrogenation of butadiene polymers and copolymers, the attempt was made to explain the dependence on hydrogen pressure with sole rate control by olefin addition to H2RhClPh2 (X3) and quasi-equilibrium rhodium distribution over the complexes with and without hydrogen [59] instead of kinetic significance of the step Xq + H2 — X3. This gives a rate equation for double-bond disappearance of the form... 

Linear low-density polyethylene (LLDPE) and PS resins were the same as described previously (Chapter 21). The various block copolymers that were used as compatibilizers have also been described (I). A series of crystalline copolymers (Q series) was prepared by hydrogenation of diblock and triblock copolymers of styrene and butadiene [styrene-hydrogenated butadiene (SEB) and styrene-hydrogenated butadiene—styrene (SEBS)J (1). Triblock copolymers of styrene and butadiene [styrene-butadiene-styrene (SBS)] and a noncrystalline hydrogenated block copolymer (SEBS) (Kraton) were supplied by Shell Chemical Co. Diblock copolymers of styrene and butadiene [styrene-butadiene (SB) (Vector)] were obtained from Dexco Polymers. The characteristics of the resins are given in Table I. 

Examples include hydrogenation of propanal over nickel, dehydrogenation of ethanol over copper-cobalt, dehydrogenation of methylcyclohexane to toluene over platinum, hydroformylation of olefins catalyzed by cobalt hydrocarbonyls on solid polymers, hydrogen-ion catalyzed hydration of olefins on ion exchangers, dehydrogenation of 1-butene to butadiene over chromia-alumina, and various hypothetical reactions. 

See 1,2-Polybutadiene Ricon 170(3)] Ricon 181] Ricon 500. See Styrene/butadiene polymer Ric-Syn Wax. See Hydrogenated castor oil Rigoiac . See Polyester resin, thermosetting Riianit BS. See Butyl stearate Riianit CSN. SeeCetearyl isononanoate Riianit DBA. See Dibutyl adipate Riianit DBS. See Di butyl sebacate Riianit DEHS. See Dioctyl sebacate Riianit DNOP. See n-Dioctyl phthalate Riianit DOA. See Dioctyl adipate Riianit DTP. See Dihydrogenated tallow phthalate... 

Glyceryl behenate Hydrogenated cottonseed oil Hydrogenated palm oil binder, carbon arc-light electrodes Potassium silicate binder, carpet backing Styrene/butadiene polymer binder, catalysts Silica, colloidal binder, caulks Vinyl acrylic copolymer binder, cement Polyacrylamide Sulfur binder, cementitious surfaces Potassium silicate binder, ceramic Ethylene/MA copolymer binder, ceramic fibers Silica, colloidal binder, ceramic glazes Hydroxyethylcellulose Methylcellulose binder, ceramic paste Ethyl silicate... 

Ethylene/vinyl acetate/vinyl alcohol copolymer Ethyl methacrylate Ferric oxide Fluorinated ethylene/propylene Food starch, modified Glyceryl triacetyl hydroxystearate Hexyl alcohol Hydrogenated styrene/2-methyl-1,3-butadiene block polymer Hydrogenated tallow lonomer resin... 

Acrylic elastomer Acrylonitrile-butadiene rubber, hydrogenated Polyethylene, ultrahigh m.w. high-density Polynorbornene Polyurethane elastomer, thermoplastic Styrenated diphenylamine , Styrene-ethylene/butylene-styrene block copolymer seals, chemical-resistant Chlorotrifluoroethylene polymer seals, dynamic aerospace Polyfluoroalkoxyphosphazene seals, dynamic industrial Polyfluoroalkoxyphosphazene seals, dynamic military Polyfluoroalkoxyphosphazene seals, high performance Tetrafluoroethylene/perfluoromethylvinyl ether copolymer seals, oil... 

Notes The values of A, B, and C and thus of y are based on a reference volume Vre/ = 0.1 nm Polymer notation A d- label preceding the polymer acronym indicates a per-deuterated polymer partially deuterated polymers are labeled as dy, df, etc., for selective deuteration of 3, 4, etc., hydrogens. Numbers in subscripted parentheses after the polymer name indicate the primary comonomer fraction, e.g., SPB(6s) is a saturated polybutadiene with 66 mol% butadiene Polymer acronyms P2VP poly(2-vinyl pyridine), P4MS poly(4-methylstyrene), PBMA poly(n-butyl methacrylate), PCHA poly(cyclohexyl acrylate), PEB poly(ethyl butylene), PIB polyisobutylene, PI polyisoprene, PMMA poly(methyl methacrylate), PPMA poly(n-pentyl methacrylate), PP polypropylene, HHPP head-to-head polypropylene, PS polystyrene, PVME poly(vinyl methyl ether), PXE poly(2,6-dimethyl-l,4-phenylene oxide), SPB saturated polybutadiene, SPI saturated polyisoprene... 

The successful preparation of several H-H polyolefins has been achieved. In one approach 1,4-butadiene polymers were synthesized and their internal double bond was then hydrogenated. This synthesis leads to H-H polymers if the substituents of the dienes are in 1,4 or in... 

Poly(ethylene- ra//-maleic anhydride) Poly(ethylene-ra -butylene), mono-01 106343-0X-2 68954-09-6 2,5-Furandione, polymer with ediene, graft I, 3-Butadiene, homopolymer, hydrogenated R (C4H203 C2H4), Unk... 

Most rubbers used in adhesives are not resistant to oxidation. Because the degree of unsaturation present in the polymer backbone of natural rubber, styrene-butadiene rubber, nitrile rubber and polychloroprene rubber, they can easily react with oxygen. Butyl rubber, however, possesses small degree of unsaturation and is quite resistant to oxidation. The effects of oxidation in rubber base adhesives after some years of service life can be assessed using FTIR spectroscopy. The ratio of the intensities of the absorption bands at 1740 cm" (carbonyl group) and at 2900 cm" (carbon-hydrogen bonds) significantly increases when the elastomer has been oxidized [50]. 

Platinum-cobalt alloy, enthalpy of formation, 144 Polarizability, of carbon, 75 of hydrogen molecule, 65, 75 and ionization potential data, 70 Polyamide, 181 Poly butadiene, 170, 181 Polydispersed systems, 183 Polyfunctional polymer, 178 Polymerization, of butadiene, 163 of solid acetaldehyde, 163 of vinyl monomers, 154 Polymers, star-shaped, 183 Polymethyl methacrylate, 180 Polystyrene, 172 Polystyril carbanions, 154 Potential barriers of internal rotation, 368, 374... 

---