𝔖 Bobbio Scriptorium
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‘Living’ Free Radical Graft Copolymers, II: Structure

✍ Scribed by Huskić, M.; Roha, Max; Harwood, H. James; Šebenik, Anton

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
506 KB
Volume
40
Category
Article
ISSN
0959-8103

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✦ Synopsis

Poly(viny1 chloride)-n-propyl xanthate (PVC-nPX) macroinitiators with 3 to 14 bonded xanthate groups per molecule were synthesized using PVC and potassium n-propyl xanthate. The reaction took place rapidly between 30 and 45°C. Ultraviolet (UV) and nuclear magnetic resonance studies confirmed the presence of xanthyl groups on these macroinitiators. The PVC-nPX macroinitiators were grafted by methyl methacrylate under UV irradiation of 254, 302 and 336 nm producing graft copolymers and homopolymers. The molecular weights increased with increasing conversion, which is consistent with a 'living' polymerization process. The active species in these polymerizations are believed to be macroradicals and xanthyl radicals.

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