Poly soap-free emulsion

Fig. 38 Schematic illustrations of proposed mechtmisms for encapsulation by soap-free emulsion polymerization with poly(St-co-HSt). In both cases, HSt serves as a kind of surfactant...

Poly(methyl methacrylate-ethyl acrylate-methacrylic acid) particles were synthesized by using a seeded soap-free emulsion polymerization process to obtain clean surfaces and surface carboxylic groups [115], Authors found that in this case dropwise addition process was better than batchswelling process to produce large particles with narrow size distribution. 

KPS as initiator [163]. Liu et al. [164] started with bilayer oleic-acid-coated iron oxide nanoparticles and applied the combination of soap-free and seeded emulsion polymerization (Fig. 20a) to produce GMA-functionalized magnetic poly(MMA-DVB-GMA) microspheres. This was followed by modification of the PGMA shell with EDA to introduce amino groups that can react with the organic dye fiuorescein isothiocyanate and that impart multifunctional, photoluminescence, superparamag-netic and pH-responsive properties to the particles (Fig. 20b). 

The other ingredients in vinyl film are not totally free from guilt either. One might expect resins themselves to be impervious to fungus growth, yet films containing various resins differ widely in their susceptibility to attack. At least one factor involved is the residual soap or surfactant on the surface of emulsion poly (vinyl chloride) (PVC) resins. Undoubtedly there are many other causative factors as well. 

---