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Synthesis of polymer microspheres with mercapto groups by polycondensation of α,ω ‐alkanedithiol and α,ω ‐dibromoalkane in the presence of a poly[styrene‐ N ‐(hydroxymethyl)acrylamide] latex
Author(s) -
Watanabe Shinji,
Ikeda Ryo,
Kitagawa Hiroyuki,
Murata Miki,
Masuda Yuzuru
Publication year - 2000
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/(sici)1521-3935(20000501)201:8<896::aid-macp896>3.0.co;2-z
Subject(s) - condensation polymer , dispersity , polymer chemistry , hydroxymethyl , acrylamide , dithiol , styrene , polymer , chemistry , microsphere , materials science , nuclear chemistry , copolymer , organic chemistry , chemical engineering , engineering
Polymer microspheres with mercapto groups were synthesized by polycondensation of α,ω ‐alkanedithiol and α,ω ‐dibromoalkane in the presence of a poly[styrene‐ N ‐(hydroxymethyl)acrylamide] latex (PS‐HMAm). Monodisperse microspheres were obtained in quantitative yield. The sulfur content of the microspheres was comparable to that calculated from the feed ratio, indicating that the polycondensation proceeds in the polymer particles. The immobilization of the mercapto group onto the microsphere is significantly influenced by the molar ratio of dithiol to dibromide and the diameter of the PS‐HMAm particles used in the polycondensation. The mercapto group content of the microsphere increases with the molar ratio of dithiol to dibromide. The polycondensation with small seed particles (0,127 μm) afforded microspheres with high mercapto group contents. On the contrary, upon use of large ones (0,456 μm) the mercapto group content is decreased.