Interaction of PE-PEP Diblocks and Waxes

A display of the nucleating capacity of the PE-PEP diblock (1.5/5 K) is shown in Fig. 25. These micrographs were taken in a cold room at -13 °C (dzl °C) and represent a commercial fuel prior to and after the addition of a formulation involving the self-assembled crystalline-amorphous diblocks and a growth arresting copolymer. Obviously, the PE-PEP diblock aggregates are 

Under these circumstances the available platelet surface area (APSA) per gram of block copolymer in the fuel is the determining parameter. Considering the molecular weight of the polyethylene chains Mpe and the polyethylene density fpE, the surface area per chain (SA) becomes  

Here is the volume of a PEP monomer, is the monomer mass, PEP is the PEP density, and 5 allows an effectively larger surface area than is blocked by the PEP hairs. Subtracting Eq. 58 from Eq. 57 yields the available siu-face area per chain. If we now multiply by the number of chains per gram we arrive at the required quantity, the available platelet surface area per gram [8]  

At this point we consider monomers as being a section of the backbone with four methylene units having foitf carbons each in the backbone. This method- 

The association of paraffins with the polyethylene surface may be directly observed under a different contrast condition. If one chooses the contrast such that the hairs are matched but, at the same time, both core and paraffins have strong contrast an interaction of the wax with the PE surfaces will appear in the scattering experiments as an increase of the effective thickness of the core. For these experiments the H1.5HH5DH sample was chosen. This sample has a protonated core and the required contrast is achieved by taking protonated paraffins in a nearly fully deuterated solvent. In this experiment the effects of two different paraffins C36 and C30 were studied. 

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