Dioctyl sebacate

From Table 5.7 it will be seen that plasticisers for PVC such as the octyl phthalates, tritolyl phosphate and dioctyl sebacate have solubility parameters within 1 cgs unit of that of the polymer. Dimethyl phthalate and the paraffinic oils which are not PVC plasticisers fall outside the range. It will be noted that tritolyl phosphate which gels the most rapidly with PVC has the closest solubility parameter to the polymer. The sebacates which gel more slowly but give products which are flexible at lower temperatures than corresponding formulations from tritolyl phosphate have a lower solubility parameter. It is, however, likely that any difference in the effects of phthalate, phosphate and sebacate plasticisers in... 

Because the solubility parameter of tritolyl phosphate is higher than that of dioctyl sebacate, PVC-tritolyl phosphate blends can tolerate more of a low solubility parameter extender than can a corresponding sebacate formulation. 

Dioctyl sebacate (DOS) with relative permittivity e of 3.9 and 2-nitrophenyl octyl ether (NPOE) with e = 23.9 are the traditionally used sensor membrane plasticizers. The choice of a plasticizer always depends on a sensor application. Thus, NPOE appears to be more beneficial for divalent ions due to its higher polarity, but for some cases its lipophilicity is insufficient. Furthermore, measurements with NPOE-plasticized sensors in undiluted blood are complicated by precipitation of charged species (mainly proteins) on the sensor surface, which leads to significant potential drifts. Although calcium selectivity against sodium and potassium for NPOE-based membranes is better by two orders of magnitude compared to DOS membranes, the latter are recommended for blood measurements as their lower polarity prevents protein deposition [92],... 

Organic compounds derived by replacing the hydrogen of an acid by an organic radical or group. Examples of ester plasticisers are tritolyl phosphate, dioctyl phthalate and dioctyl sebacate. ETAD... 

Fig. 18a. 11. Chemical structures of commonly used plasticizers in membranes of ion-selective electrodes. DOS, dioctyl sebacate NPOE, nitrophenyl octyl ether.

Samples. CDC-treated nickel-plated steel sheets (nickel coating weight of 600 mg/m and chromium coating weight of 6 mg/m ) were oiled with about 5 mg/m of dioctyl sebacate (DOS) or acetyl tributyl citrate (ATBC) and were employed as original samples. 

Dioctyl phthalate Dibutoxyethyl phthalate Tricresyl phosphate Dioctyl sebacate Triphenyl phosphate Dihexyl phthalate Hydrogenated terphenyl Dibutyl sebacate Dibutyl phthalate Dipropyl phthalate Diethyl phthalate Glycerol... 

An indirect method for the determination of log Poet was also proposed by Chen et al. [91[. The method is based on the partitioning of solutes between a plasticized PVC film (PVC/dioctyl sebacate) and water (log Pp, ) in 96-well micro-titerplates. For a series of 15 reference compounds with log Poet ranging from 0.5 to 3.2, the authors showed that log Poet was related to log Pp by Equation (5.10) ... 

There are several plasticizers for PVC that may be used in propellants. Weil (19) mentions sebacates, phthalates, adipates, and glycol esters of higher fatty acids as being desirable. Dibutyl sebacate, dioctyl sebacate, and 2-ethylhexyl adipate are all good. The plasticizer has a most important effect on the physical properties of the cured propellant and the variation of these properties with temperature. Long chain, aliphatic plasticizers impart improved low temperature flexibility, and hence are preferable to aromatic plasticizers such as the phthalates. An increase in plasticizer viscosity leads to an increase in viscosity of the mixed pro-... 

Dioctyl Sebacate (DOS). See Di(2-ethylhexyl)-sebacate in this Vol and the Conf Propint Manual SPIA/M2 (1962) in which are described rocket propints Units 511 6ll using DOS as a plasticizer... 

Dortmund-deme versuchstrecke 5 D1535 DOS see Di (2-ethylhexyl) sebacate 5 D1237 DOS see Dioctyl sebacate 5 D1402—D1403... 

DES = Diethyl sebacate DBS = Dibutyl sebacate DHS = Dihexyl sebacate DOS = Dioctyl sebacate DNS = Dinonyl sebacate... 

Dioctotyl Sebacate. See under the title of Di(2-ethylhexyl) sebacate or Dioctolyl Sebacate (DOS) in Vol 5, D1237-L, and under the title of Dioctyl Sebacate (DOS) also in Vol 5, D1402-L to D1403-L. Also, the following Addnl Refs 1) C.J. Barr H.R. Weisbrod, Solid-Propellant Fuel Binder , USP 3138502... 

Other 2-ethylhexanol based plasticizers were introduced, including some which imparted outstanding low temperature flexibility—dioctyl adipate (DOA), dioctyl azelate (DOZ), dioctyl sebacate (DOS), and trioctyl phosphate (TOF). In addition, TOF showed high resistance to microorganisms which was important in military applications. Furthermore, TOF improved flame resistance. However, the mixed ester—octyl diphenyl phosphate—also introduced in the forties—was far superior and showed a better balance of low temperature performance and flame resistance than either TOF or the well-established plasticizer—tricresyl phosphate (TCP). Each of these found a market as a specialty plasticizer because of these specific performance attributes. None, however, was a serious threat to DOP on an overall price-performance basis. Rather, they were used to supplement the properties of DOP where its performance was inadequate. 

A hydrophobic cobyrinate (Figure 2, structure 2) was used to prepare solvent polymeric membranes (10). The typical membrane composition was 1% (w/w) ionophore, 66% (w/w) plasticizer and 33% (w/w) polymer. Electrodes prepared with this ionophore, dioctyl sebacate (DOS) and poly(vinyl chloride) (PVC) presented, at pH 6.6, the selectivity pattern shown in Figure 3. The response of the electrodes was near-Nernstian for salicylate, thiocyanate, and nitrite. Their selectivity behavior clearly deviates from that of the Hofmeister series, with nitrite being the anion that presents the larger deviation. 

SYNS BISOFLEXDOS DECANEDIOIC ACID, BIS(2-ETHYLHEXYL) ESTER DI(2-ETHYLHEXYL)SEBACATE DIOCTYL SEBACATE DOS 2-ETHYLHEXYL SEBACATE MONOPLEX DOS... 

Lanthanide enolates carrying lipophilic groups can be used as ionophores to fabricate Cl ISE membranes. Thus, electrodes with a membrane incorporating into pvc a lantanide chelate such as 61 or 62a-c, an anion excluder such as NaBPlu and a plasticizer (dioctyl sebacate, dioctyl adipate, dibutyl phthalate, dioctyl phthalate or tributyl phosphate) have... 

US Military requirements for DOS are covered by Spec MIL-D-10692(Ord)(1954), entitled Di(2-eihylhexyl) sebacate (without mentioning that the compd is identical with commonly used name Dioctyl Sebacate)... 

---