title: Facile Synthesis of Novel Polyethylene-Based A-B-C Block Copolymers Containing Poly(methyl methacrylate) Using a Living Polymerization System.
abstract: Ethylene-propylene-methyl methacrylate (MMA) and ethylene-hexene-MMA A-B-C block copolymers with high molecular weight (>100,000) are synthesized using fluorenylamide-ligated titanium complex activated by modified methylaluminoxane and 2,6-di-tert-butyl-4-methylphenol for the first time. After diblock copolymerization of olefin is conducted completely, MMA is added and activated by aluminum Lewis acid to promote anionic polymerization. The length of polyolefin and poly (methyl methacrylate) (PMMA) is controllable precisely by the change of the additive amount of olefin and polymerization time, respectively. A soft amorphous polypropylene or polyhexene segment is located between two hard segments of semicrystalline polyethylene and glassy PMMA blocks.
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China.
authors.forename: Xiangyang
authors.initials: X
authors.lastname: Song
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China.
authors.forename: Qiong
authors.initials: Q
authors.lastname: Ma
authors.affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China.
authors.forename: Zhengguo
authors.initials: Z
authors.lastname: Cai
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, 739-8527, Japan.
authors.forename: Ryo
authors.initials: R
authors.lastname: Tanaka
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, 739-8527, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Shiono
authors.affiliation: Department of Chemistry, Stony Brook University, Stony Brook NY 11794, Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA.
authors.forename: Robert B
authors.initials: RB
authors.lastname: Grubbs
mesh_terms: D000475:Alkenes / Q000737:chemistry; D066241:Carbon-13 Magnetic Resonance Spectroscopy; D002850:Chromatography, Gel; D005030:Ethylenes / Q000737:chemistry; D008422:Materials Testing / Q000379:methods*; D020959:Polyethylene / Q000737:chemistry*; D058105:Polymerization; D019904:Polymethyl Methacrylate / Q000737:chemistry*
chemical_list: D000475:Alkenes; D005030:Ethylenes; D020959:Polyethylene; D019904:Polymethyl Methacrylate; C036216:ethylene; C013658:propylene; C117224:1-hexene
keywords: living polymerization; methyl methacrylate; olefin; single-site catalyst; triblock copolymers