INDEX impact behavior

Fig. 8-3 Example of the effect of processing conditions on impact for PP with different melt index flow behaviors.

We have also synthesized bis(2-azidoethyl) adipate (BAEA) by the reaction of bis(2-chloro ethyl) adipate (BCEA) and sodium azide in ethanol medium and characterized the product for solubility, density, refractive index, impact sensitivity, thermal behavior and moisture content [171]. These properties suggest that a part of non-energetic plasticizers, that is, , DEP, DOP etc. can be replaced by BAEA in propellant formulations thereby resulting in increase in their fsp. 

Time and space allow only abbreviated discussion of two other commonly reported data sheet line items mdt flow rate - melt index (flow behavior) and DTUL (functional performance of a solid). Similar to Izod impact, Aese are also sin e data point tests. While providing some information for quaU control purposes, neither one is eligible for consideration as design-caliber data. 

Water absorption can also cause significant changes in the permittivity and must be considered when describing dielectric behavior. Water, with a dielectric constant of 78 at 25°C, can easily impact the dielectric properties at relatively low absorptions owing to the dipolar polarizability contribution. However, the electronic polarizability is actually lower than solid state polymers. The index of refraction at 25°C for pure water is 1.33, which, applying Maxwell s relationship, yields a dielectric constant of 1.76. Therefore, water absorption may actually act to decrease the dielectric constant at optical frequencies. This is an area that will be explored with future experiments involving water absorption and index measurements. 

Parameters such as cell disintegration index, porosity, water content and distribution, water activity, color, texture, shrinkage, rehydration behavior and leakage, content of heat-sensitive compounds and distribution of dissolved solids, as well as overall sensorial perception, are of interest when evaluating the impact of PEF and ultrasound, and also of the drying process, on product quality characteristics. 

Low oxidation (OI < 1) For ASTM oxidation index values of less than 1, it is very difficult to demonstrate a negative correlation with mechanical properties from retrievals, regardless of whether they are measured using miniature tension tests or small punch tests [16, 22, 34]. For this reason, oxidation indices of less than 1 may be considered relatively low, and despite evidence of early oxidative changes, it is unlikely that these changes have yet had a substantial negative impact on mechanical behavior. 

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