Branched Vinyl Polymers

Application of the strathclyde route to branched vinyl polymers in suspension polymerization.

Branched vinyl polymers.

Synthesis of branched vinyl polymer using a balance of crosslinker and radical transfer agent. Branched polymers have attracted increasing interest due to their numerous and various applications originating from a large variety of available polymer topologies compositions or morphologies for phase separating systems as emulsifier and interfacial compatibilizers or for surface modification properties. Copolymerisations of mma and bda were carried out in toluene solution under vacuum at 80 c using a standard methodology. Branched polymers of styrene methyl methacrylate mma and vinyl acetate vac were prepared under solvent free conditions through radical polymerization in the presence of a peroxide monomer.

Manufacturing of vinyl acetate veova vinyl ester polymers is easy due to the favorable reactivity characteristics of the veova monomer and vinyl acetate. It was not until 1995 that fréchet et al. In the case of polymerization at styrene100 mhm5 0 aibn2 0 the molecular weight increased with conversion and reached a value of 7 3 105 g mol at 99 conversion. Also discovered is a vinyl polymer resin comprised of from 0 1 to 50 weight percent of non linear polymers having at least 0 06 branches 1000 backbone carbons where branching is measured using a heat polymerized polystyrene having from 0 0 to 0 06 branches 1000 backbone carbons as a linear reference.

In addition the zimm branching factor g. It is expected that these branched polymers will be used as polymer rheological modifiers 1 2 3 4. For those reactions with 1 mol crosslinker and no thiol the reactions gelled. Veova vinyl esters are commonly used in vinyl acetate and acrylic polymers where they greatly improve hydrolytic stability adhesion water and uv resistance.

Table 1 summarises the results obtained. The copolymerization of hydrophobic vinyl ester of branched neo carboxylic acids significantly improves the performance of vinyl and acrylic binders. Graft copolymers 1 4 are one of the important classes of branched polymers and. Architectural thermal and rheological characterization of the derived branched products.

Macromolecules 2009 42 20 7745 7752. Furthermore radical polymerization in the presence of the peroxide monomer can be operated in a simple polymerization composition involving only the.