Abstract
Block and graft copolymers of styrene, methyl-methacrylate, or chloroprene with polysiloxanes that bear mercaptan groups were prepd. by free radical polymn. One polysiloxane had thiol groups on each silicon residue, a second had about a 5% fraction so functionalized, and the third had thiol groups only at the two ends. When the monomer/thiol ratio was low, single residues were added by the thiol-ene process, but a high ratio promoted a chain transfer process, with reasonably long grafts. The structures were detd. by high field NMR anal. The materials obtained from the second and third polysiloxanes were turbid, when cast as films, and had silicone-rich phases dispersed within PMMA- and polystyrene rich phases. [on SciFinder(R)]
Original language | English |
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Pages (from-to) | 213-214 |
Number of pages | 2 |
Journal | American Chemical Society, Polymer Preprints, Division of Polymer Chemistry |
Volume | 42 |
Issue number | 1 |
Publication status | Published - 2001 |
Keywords
- siloxane vinyl block graft copolymer prepn
- mercaptopropyl methylsilanediol styrene dimethylsilanediol graft block copolymer prepn
- chloroprene mercaptopropyl methylsilanediol dimethylsilanediol graft block copolymer prepn
- methyl methacrylate mercaptopropyl methylsilanediol dimethylsilanediol graft block copolymer prepn