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Synthesis of PS‐ g ‐POSS hybrid graft copolymer by click coupling via ”graft onto” strategy
Author(s) -
Niu Maoshan,
Li Tao,
Xu Riwei,
Gu Xiaoyu,
Yu Dingsheng,
Wu Yixian
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.38877
Subject(s) - click chemistry , polystyrene , materials science , copolymer , grafting , polymer chemistry , glass transition , alkyne , fourier transform infrared spectroscopy , yield (engineering) , contact angle , coupling reaction , chemical engineering , polymer , catalysis , chemistry , composite material , organic chemistry , engineering
Polystyrene (PS)‐incorporated polyhedral oligomeric silsesquioxanes (POSS) organic–inorganic hybrid graft copolymer could be achieved by click coupling reaction between alkyne groups in POSS and azido groups in PS via “graft onto” strategy. Alkyne‐functionalized POSS was synthesized via thiol‐ene facile click reaction and subsequent amidation reaction with very high yield. Azido‐multifunctionalized PS could be synthesized by chloromethylation and subsequent azido reaction. The chemical structures of PS‐(CH 2 Cl) m , PS‐(CH 2 N 3 ) m , and PS‐ g ‐POSS were determined by Fourier transform infrared and 1 H NMR characterization. PS‐ g ‐POSS presented a better hydrophobic property with contact angle of 113° than that of PS (85°). And PS‐ g ‐POSS with ≤5% of grafting degree had lower glass transition temperature ( T g ) than that of PS and then it increased up to 112°C with grafting degree. An obvious aggregation of POSS phase with 10–80 nm in size was formed in PS‐ g ‐POSS matrix. In addition, 5 wt % of PS‐ g ‐POSS was added to general purpose polystyrene (GPPS) to remarkably improve its tensile strength from 45 to 57 MPa. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013