Stability low temperature

LLDPE has most of the good features of both LDPE and HDPE— strength, flexibility, clarity, good dielectrics, and high/low temperature stability (for wire and cable shielding). 

Selected experimental agents were subjected to an accelerated low-temperature stability test to determine the sensitivity of each sample to form solids. Samples that... 

Morimoto, N., Koto, K. Phase relations of the Cu-S system at low temperatures stability of anilite. Am. Mineralogist 55, 106-117 (1970)... 

Starch is used in frozen foods for the same reason it is used in fresh, refrigerated or canned foods, i.e. for thickening, low-temperature stability and control of the flow character of the food. Freezing exacerbates syneresis in other components of the food system, such as fruit tissue, increasing the demand for water entrainment by the starch. Frozen dinners are cooked, cooled, packaged and flash frozen. Fruit pie fillings are mixed, heated, cooled, filled into shells and flash frozen. Freezing introduces stability demands beyond the other forms of distribution. The stability of the starch... 

The above considerations were a starting point in the formulation of the problems in the series of investigations discussed in this chapter.14-24 The motive for elucidating the mechanochemical aspect of the radiation cryochemistry of solids was the discovery14 of the effect of excitation of a reaction in the irradiated, low-temperature-stabilized samples of reactants in response to a local fracture. 

Current research efforts are directed toward improving the thermal and low-temperature stability of vegetable oils by chemical modification, blending with functional fluids and additive response studies. 

The low-temperature stability of bicyclo[2.2.1]heptane derivatives is well documented by the huge literature on liquid-phase norbornyl carbonium chemistry under such conditions, no ring expansion is observed, but instead, multiple Wagner-Meerwein rearrangements take place, preserving the bicyclo[2.2.1]heptane structure in the course of nucleophilic substitution or elimination reactions. This remarkable behavior is at the origin of the nonclassic carbonium ion concept (28). 

As the vertical axis of Figure 6.1 indicates, those minerals that crystallize at lower temperature tend to be more stable and resistant to weathering at earth surface (low temperature, 1 atmosphere pressure) conditions. The geochemical properties associated with low-temperature stability are ... 

The most important area for PTHF and THF-alkylene oxides copolymers remains the PU elastomers area (including elastomeric fibres), the PTHF and the high THF content copolymers confer on the resulting PU elastomers specific properties, such as excellent hydrolytic stability, resiliency, low temperature stability, elasticity at lower temperatures, and resistance to fungus attack [7, 35, 36, 37]. 

Beilstein Handbook Reference) BRN 1099706 Butyl alcohol, hydrogen phosphite Butyl phosphonate ((BuO)aHPO) Di-n-butyi hydrogen phos-phite Dibutoxyphosphine oxide Dibutyl hydrogen phosphite Dibutyl hydrogen phosphonate Dibu l phosphite Dibutyl phosphonate Dibutylfosfit EINECS 217-316-1 HSDB 2597 Mobil DBHP NSC 2668 Phosphonic acid, dibutyl ester Phosphorous acid, dibutyl ester Syn-O-M P-316. Used as amine salts in mineral and synthetic base stocks as load-carrying additives with secondary activity as low-temperature stabilizers and metal deactivators. Liquid bpii = 118-119" d = 0.9950. Akzo Chemie. 

Erhan, S.Z. B.K. Sharma J.M. Perez. Oxidation and low temperature stability of vegetable oil-based lubricants. Ind. Crop Prod. 2006,24, 292-299. 

However, so far the stability of most devices is much lower than in conventional inorganic systems. Furthermore, the low-temperature stability limits their use in many applications where temperatures of several hundred Kelvin have to be survived. 

Fig. 3.1. The phase diagram of ice. Broken lines represent presumed phase boundaries which have not yet been fully investigated. Dotted lines represent metastable continuations of one phase into a neighbouring region. Ice IV, which is metastable in the region of stability of Ice V, and Ice D, which is metastable in the low-temperature stability region of Ice Ij, are not shown. The L-VII phase boundary continues unbroken up to at least aoo kbar, where the melting point is about 440 °C.

Nonelastomeric Thermosetting Polyurethane Curable mixtures of isocyanate prepolymers or monomers. Has good abrasion resistance and low-temperature stability, but poor heat, fire, and solvent resistance and weather-ability. Processed by reaction inj ection and structural foam molding, casting, potting, encapsulation, and coating. Used in heat insulation, auto panels and trim, and housings for electronic devices. 

Low-temperature stability prohibits wood fiber/flour s use in many applications. Wood s processing temperature is limited to 210 °C, meaning that PE is often the WPC matrix material of choice. 

Low-temperature stability. Retains strength and flexibility at subzero temperatures. 

Because of low temperature stability and potential resin degradation, quats are not normally used as internal antistats. However, when topically applied, quats can achieve low surface resistivities and are widely used in such short-term applications as the prevention of dust accumulation on plastic display parts. More durable applications are not generally feasible because of the ease with which the quat antistat coating can be removed from the plastic during handling, cleaning, or other processes. For longer-term protection internal antistats are used. 

Cellulose Derivatives - good solubility - resistant to brine - sensitive to pH " Fe - low temperature stability - no shear thinning... 

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