Nu] are The volume fractions of LOP and Nucrel in the blend.
The obvious reason for void formation is the poor adhesion between LOP and PE.
There is a close analogy between the LOP particles and the crystallites in semicrystalline polymers in that both are almost impenetrable for oxygen.
LCP] = 0) is the oxygen diffusivity in the pure matrix polymer, [beta] is a factor taking into account the constraining effect of the LOP phase on the penetrable PE phase.
The aspect ratios of the oblate LCP spheroids or lamellae for the two blend series increased significantly with increasing LOP content according to the data obtained by SEM (Table 1), which is in qualitative agreement with the predictions based on the Fricke model (Fig.
It was impossible to assess the permeability for the blends with 47 vol% LOP with the Mocon apparatus; the oxygen transmission rates were lower than the detection limit 0.
For example, operating LOP means we'll give up some horsepower--refer again to the graphs on page 14--and therefore be flying more slowly.
Some big-bore Lycomings are particularly troublesome to coax into LOP operations, while some similar-displacement Continentals can run that way out of the box, without balanced fuel injectors.
At these higher power settings, we should be far enough ROP or LOP to avoid the so-called "red box," highlighted in Figure 2 at left.
We recommend employing LOP techniques in operating piston aircraft engines when they're appropriate.
In our book, the key isn't whether we're ROP or LOP, but whether we're enough ROP or LOP to avoid operating in the red box.