POLYMERIC STABILISER

D. H. Napper, Polymeric Stabilisation of Colloidal Dispersions, Academic Press, London, 1983. 

Napper D (1983) Polymeric stabilisation of colloidal dispersions. Academic Press... 

Compound M is much more stable than L. Any attempt to remove water of hydration from L resulted in its rapid polymerization. Stabilisation of crystalline solid hydrated L is probably due to a high interaction energy between zwitterion and water molecules in the crystal lattice. 

The use of a polymeric stabiliser for the emulsion (also with multipoint attachment). 

Napper, D.H. (1983) Polymeric Stabilisation of Dispersions, Academic Press, 15. 

In most cases, a mixture of a polymeric stabiliser such as poly(vinyl alcohol) or Pluronic (an A-B-A block copolymer of PEO, A and PPO) with an anionic surfactant, such as sodium dodecyl sulphate is used. In this case, the stabiHsing mechanism is the combination of electrostatic and steric mechanism, referred to as electrosteric. 

Some interest continues in absorber systems. Silane and styrene monomers have been copolymerised with 2-vinylphenyl benzotriazole stabilisers in order to graft the stabilisers into the polymer chain °. When doped into plastics materials they were found to exhibit high surface activity. However, there is a conflicting report from other workers on similar structures where it is claimed that such polymeric stabilisers do not photoprotect the surface of polystyrene . Poly(2,6-dimethyl-l,4-phenylene oxide) has been effectively stabilised with an ortho-hydroxyphenyl benzotriazole stabiliser while in another study these compounds are claimed to be lost rapidly from polycarbonates . Other types... 

Influence of Environmental Temperatures on the Performance of Polymeric Stabilising Agent in Fresh Cementitious Materials... 

Later patents to General Electric Company [95, 96] claimed oxanilides which could be used to form polymeric stabilisers or could be added to the polymerisation stage of polycarbonates or polyesters to provide built-in stabilisers. An example of this type of structure IS HOPh-R-PhNH(C=0)(C=0)NHPh-R-PhOH. 

---