Polybutadiene, hydroxyl

Water Treatment Microbicide. See Didecyidimonium chloride HS-451 Waterbed Microbicide. See Benzalkonium chloride HSA 12-HSA. See Hydroxystearic acid HSC Aspartame Fine, HSC Aspartame Peari 700, HSC Aspartame Powd. 200. See Aspartame HSZ-320NAA. See Aluminum silicate HTAB. See Cetrimonium bromide HTBD. See Polybutadiene, hydroxyl-terminated HTH Aikaiinity Pius Adjuster. See Sodium bicarbonate... 

Polybutadiene glycol. See Polybutadiene, hydroxyl-terminated Polybutadiene, hydroxyl-terminated Synonyms HTBD Poly BD glycol ... 

Octadecenyl succinic anhydride 1-Octenylsuccinic anhydride Polybutadiene, hydroxyl-terminated Polymethyl methacrylate Tetrapropenyl succinic anhydride... 

Meroxapol 105 Meroxapol 108 Meroxapol 171 Meroxapol 172 Meroxapol 174 Meroxapol 178 Meroxapol 251 Meroxapol 252 Meroxapol 254 Meroxapol 255 Meroxapol 258 Meroxapol 311 Meroxapol 312 Meroxapol 314 binder, road marking paints Isobutyl methacrylate Manila resin binder, road-marking paints Rubber, chlorinated binder, rocket fuels Polybutadiene, hydroxyl-terminated Polychloroprene binder, rocket propellants Polyurethane, thermoplastic binder, roof coatings Vinyl acrylic copolymer binder, rubber... 

Polybutadiene, hydroxyl-terminated pipe thread compounds Zinc dust... 

Table 1. Solubility parameter of polybutadiene, hydroxyl terminated. ...

Carbon Cha.in Backbone Polymers. These polymers may be represented by (4) and considered derivatives of polyethylene, where n is the degree of polymeriza tion and R is (an alkyl group or) a functional group hydrogen (polyethylene), methyl (polypropylene), carboxyl (poly(acryhc acid)), chlorine (poly(vinyl chloride)), phenyl (polystyrene) hydroxyl (poly(vinyl alcohol)), ester (poly(vinyl acetate)), nitrile (polyacrylonitrile), vinyl (polybutadiene), etc. The functional groups and the molecular weight of the polymers, control thek properties which vary in hydrophobicity, solubiUty characteristics, glass-transition temperature, and crystallinity. 

Modern propellants use polybutadiene type binders whose main chain terminates with either hydroxyl... 

Polyether-based thermoplastic copolyesters show a tendency toward oxidative degradation and hydrolysis at elevated temperature, which makes the use of stabilizer necessary. The problem could be overcome by incorporation of polyolehnic soft segments in PBT-based copolyesters [31,32]. Schmalz et al. [33] have proposed recently a more useful technique to incorporate nonpolar segments in PBT-based copolyesters. This involves a conventional two-step melt polycondensation of hydroxyl-terminated PEO-PEB-PEO (synthesized by chain extension of hydroxyl-terminated hydrogenated polybutadienes with ethylene oxide) and PBT-based copolyesters. 

Liquid rubbers In order to improve the flexibihty of short glass fiber-reinforced epoxy composites, Kaynak et al. [53] modified the epoxy resin matrix with hydroxyl-terminated polybutadiene (HTPB) liquid mbber. A silane coupling agent was also used to improve the interfacial adhesion between glass fibers and epoxy matrix. However, Humpidge et al. [54] reported some unique processing problems for the resulting pasty mixmres when short textile fibers were incorporated in a hquid mbber medium. 

Raw Material Obtained in the Following Size Containers Styrene by barge in 2,200,000 lb shipments Hydroxyl apatite in 50 lb bags Dodecylbenzene sulfonate in 5 gal cans Benzoyl peroxide in 300 lb drums Polybutadiene in 50 lb bales Hydrochloric acid in tank truck shipments... 

Model networks were prepared using hydroxyl terminated polymer and isocyanates, (a) Bifunctional hydroxyl terminated polybutadiene (Butarez, from Phillips Petroleum) was crosslinkined with tris (p-isocyanatophenyl)-thiophosphate (Desmodur RF, from Mobay Chemical Co.). This crosslinked... 

The use of these initiators to polymerize LA814 and methylglycolide815 has been reported to proceed in a well-controlled fashion. Block copolymers such as PCL-b-PLA have also been prepared. Elimination of PrOH from the reaction of (270) with preformed hydroxyl terminated polymers, followed by lactone polymerization, yields diblocks of CL with polystyrene or polybutadiene.816 The preparation of an ABA triblock has also been reported (A = CL, B = LA) since propagating chains of PLA do not initiate CL ring opening, (270) was pretreated with hydroxy terminated (PCL-b-PLA)-OH 814... 

We chose the tt-bonds of the polybutadiene block as the functional groups to connect different side groups to the polymer block. A direct connection of side groups to the rr-bonds is difficult and leads to unstable products therefore, a two-step synthesis was employed. The first step is a conversion of the Jt-bonds into a more easily accessible species. This can be done by either hydroxylation (hydro-... 

It has been shown recently (10) that such block structures could be tailored precisely by the general method summarized hereabove. It is indeed possible to convert the hydroxyl end-group of a vinyl polymer PA (f.i. polystyrene, or polybutadiene obtained by anionic polymerization terminated with ethylene oxide),into an aluminum alcoholate structure since it is well known that CL polymerizes in a perfectly "living" manner by ring-opening insertion into the Al-0 bond (11), the following reaction sequence provides a direct access to the desired copolymers, with an accurate control of the molecular parameters of the two blocks ... 

Poly butadienes. Hydroxyl-terminated polybutadienes are comparatively late comers and are still in the development stage. They combine the high specific impulse of the well-proved carboxy-terminated polybutadienes with the clean, stoichiometric urethane reaction yielding propellants with unsurpassed mechanical properties. 

Contrary to the general trend described above, hydroxyl terminated polybutadiene (a polyurethane) has a burning rate curve which bends concave downward below 0.3 atm. (Figure 16), and the extinction pressure of this propellant is rather high (0.18 atm.). The burned surface of extinguished samples of this propellant had a glistening black appearance. 

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