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Synthesis of Multifunctionalized Graft‐Type Polyolefin‐Based Elastomers with a High Utility Temperature
Author(s) -
Ying Wu Bin,
Lee Min Woo,
Yang Hee Sang,
Moon Da Som,
Ko Na Yeong,
Lee Bumjae,
Zhu Jin,
Zhang Ruoyu,
Lee Kyung Jin
Publication year - 2017
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/macp.201700298
Subject(s) - polyolefin , polymer chemistry , elastomer , copolymer , polymerization , anionic addition polymerization , materials science , living polymerization , polymer , radical polymerization , composite material , layer (electronics)
A novel polyolefin‐based elastomer of polyolefin‐ graft ‐poly( t ‐butylstyrene) is synthesized from styrene moieties via graft‐from anionic living polymerization. The afforded elastomer comprises a soft poly(ethylene‐ t ‐1‐hexene‐ t ‐divinylbenzene) segment and a hard poly( t ‐butylstyrene) [P( t ‐BS)] segment. The polymerization proceeds via complete lithiation of the pendent styrene groups (polyolefin elastomer) and subsequent graft anionic polymerization of 4‐ tert ‐butylstyrene (2000–10 000 g mol −1 ). The graft‐from living anionic polymerization controls the grafting size with excellent efficiency by increasing the monomer concentration. To introduce functional groups into the polymer chain‐end, vinyl isoprene units are introduced into the polyolefin‐ graft ‐poly( t ‐butylstyrene) anion to form polyolefin‐ graft ‐[poly( t ‐butylstyrene)‐ block ‐polyisoprene] via living block copolymerization. Subsequent graft chain‐end multicarboxyl functionalization via thiol‐ene “click” reactions introduces carboxyl groups into the [P( t ‐BS)] graft chain‐end. The water contact angle of this multicarboxyl functionalized product exhibits a sharper decrement, which affects its hydrophilicity significantly. This process produces a novel, well‐defined functionalized graft‐type polyolefin‐based elastomer with a high utility temperature and excellent mechanical properties.