Monomer-polymer compatibility, plasma

Overall, the plasma-treated samples show an improvement in terms of dispersion and tensile properties. Treatment with different plasma monomers show different levels of improvement in terms of dispersion and final vulcanizate properties due to the different levels of compatibilization in the polymer blend and, more specifically, with the different polymers used in this blend. The most important aspect for achieving an optimal balance between the properties of a filled polymer blend for a specific application is the selection of the proper monomer for the plasma modification of the silica surface, in relation to its required compatibility with a particular polymer in the blend. 

In formulating a plasma developable electron resist (PDE), NVC, DPAE, MAM and ODMA have been evaluated as monomers along with PC1S, PS, PBD and PTCEM as base polymers. Aside from lithographic performance, the main issues concerning the formulation of PDE are the sublimation or vaporization of monomers under vacuum and the compatibility of the monomer with the base polymer. 

The minimization of chemical and physical interactions between polymer and blood plasma is presently the actual dominant concept to improve the blood compatibility of polymers for intra- and extracorporal short-term appUcations [104,105]. Most polymers for tube and catheter systems present a hydrophobic surface. Plasma technology is appUed to hydrophiUzation and graftcopolymeri-zation of hydrophihc monomers [106,107]. 

New concepts for making blood compatible polymer materials have been proposed based on the characteristics of natural phospholipid molecules in plasma. It was considered that if a polymer surface possesses a phospholipid-like structure, a large amount of natural phospholipids in plasma can be adsorbed on the surface by their self-assembling character. Based on this idea, a methacrylate monomer with a phospholipid polar group, 2-methacryloyloxy ethyl phosphorylcholine (MFC), was designed and synthesized The polymers, composed of MFC and various alkyl methacrylates (as shown in Fig. 1) or styrene derivatives were prepared and their blood compatibility carefully evaluated ". Flatelet adhesion and activation were significantly suppressed on the surface of the MFC polymers when the MFC composition was above 30 mol%. These excellent... 

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