unsaturated

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unsaturated

1. (of a chemical compound, esp an organic compound) containing one or more double or triple bonds and thus capable of undergoing addition reactions
2. (of a fat, esp a vegetable fat) containing a high proportion of fatty acids having double bonds
3. (of a solution) containing less solute than a saturated solution

unsaturated

[¦ən′sach·ə‚rād·əd]
(mineralogy)
Referring to a mineral that will not form in the presence of free silica.
References in periodicals archive ?
In particular, these properties depend on the degree of unsaturation of the fatty acids, as well as the quantity and quality of the compounds present in the nonsaponifiable fraction [9].
In addition, chain branching is also affected by the MWD (and therefore by temperature and concentrations of butadiene and DEAC), as short chains can probably be incorporated at higher rates, given the higher mobility and availability of the internal unsaturations of these chains.
Thorough mixing and careful control of halogenation ensures that only the small amount of unsaturation reacts with the halogen by way of a substitution at the allylic position along the polymer backbone.
In a subsequent step (Process 1B), the unsaturation sites provided by the grafted coagent serve as attachment points during reactive processing with peroxide and mercaptopropyltrimethoxysilane (MPTMS).
The spectrum does not show any peak at 2.8 ppm, which indicates that there is no contribution of bis-allylic protons ([--CH.sub.2], comprised between two unsaturations).
The use of high sulfur to produce such compounds is not feasible with EPDM due to low levels of unsaturation, particularly the lack of backbone unsaturation in EPDM.
17) also did not show an unsaturation peak at 3155 [cm.sup.-1] indicating reaction of the added BMI.
Table 2 contains data on the various types of unsaturation and tertiary hydrogens in the polyethylenes.
In practice, a standard titration is achieved with non-ozonized PE because It is known that Iodi ne can add up onto the unsaturations of polyolefins (25).
It is postulated that as degradation proceeds, cross-linking occurs between the free radicals, facilitated by the presence of unsaturation, causing the observed increase in the tensile modulus, and an increase in [T.sub.g] and loss modulus [11].
Moreover, in add ition to catalyst residues, the increased concentration of unsaturations may influence stability [6, 8, 22].
In the case of unsaturated EPDM, crosslinks are also formed via addition of an EPDM macro-radical to the pendant unsaturation of the third monomer.