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Styrene/methyl methacrylate (75/25) monomer mixtures were copolymerized at 323 K in the presence of a polybutadiene seed latex using either a water soluble (potassium persulfate) or an oil soluble (cumene hydroperoxide) initiator. The polybutadiene seed latex was made via an emulsifier free emulsion polymerization process. The graft copolymerizations were performed over a range of emulsifier concentrations. The emulsifier free polymerization with cumene hydroperoxide shows a very high degree of grafting while neither secondary nucleation nor coagulation was observed. Furthermore, the graft polymers have been extensively studied in terms of intra- and intermolecular microstructure. For this purpose, the breaking of the polymer backbone by means of ozonolysis was necessary. The grafted styrene/methyl methacrylate copolymer is less rich in styrene than the free copolymer. The chemical composition distributions of the graft copolymer were broader than those of the free copolymer.

Посилання на статтю:

Emulsifier free grafting of styrene and methyl methacrylate concurrently onto polybutadiene and determination of the copolymer microstructure / Annemieke M. Aerdts, Jolanda E. D. de Krey, Jenci Kurja andAnton L. German // Polymer. – 1994. – Vol 35. – P. 1636-1647.

Emulsifier free grafting of styrene and methyl methacrylate concurrently onto polybutadiene and determination of the copolymer microstructure - Завантажити.