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Synthesis of Propylene Diblock Copolymers via Metallocene and Borane Chemistry
Author(s) -
Jiang George J,
Hwu Jyh Ming,
Lee Sheau Fang,
Hsu Ming Tsunh
Publication year - 2000
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200000073
Subject(s) - polymer chemistry , polypropylene , copolymer , chemistry , polypropylene glycol , borane , polymerization , metallocene , tacticity , post metallocene catalyst , prepolymer , hydroboration , polymer , polyurethane , organic chemistry , catalysis , polyethylene glycol
An isotactic chain end unsaturated polypropylene was prepared by the homogeneous metallocene catalyst Et(Ind) 2 ZrCl 2 with MAO. Herein, the chain end unsaturated polypropylene proceeded the hydroboration reaction to prepare borane‐containing polypropylene. The borane‐containing polypropylene could be transformed to hydroxyl‐terminated polypropylene, PPOH. And then the polypropylene‐nylon 6 diblock copolymer, PP‐b‐NY6, was synthesized from telechelic PPOH by converting this prepolymer with toluene diisocyanate and using the resulting materials as macroactivators for anionic caprolactam polymerization. Meanwhile, this investigation used borane‐containing polypropylene and oxygen to produce free radicals at the chain end on the polypropylene. Experimental results indicate that the free radical is an effective initiator for the polymerization of methyl methacrylate to produce diblock PP‐b‐PMMA. The block copolymers are characterized by IR, NMR, and DSC analyses. The diblock copolymer is a good compatibilizer for polymer blends.