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Nitroxide mediated miniemulsion polymerization of methacryloisobutyl POSS : Homopolymers and copolymers with alkyl methacrylates
Author(s) -
Tajbakhsh Saeid,
Marić Milan
Publication year - 2020
Publication title -
journal of polymer science
Language(s) - English
Resource type - Journals
eISSN - 2642-4169
pISSN - 2642-4150
DOI - 10.1002/pol.20200438
Subject(s) - miniemulsion , copolymer , polymer chemistry , nitroxide mediated radical polymerization , polymerization , materials science , monomer , methacrylate , polymer , alkyl , radical polymerization , chemistry , organic chemistry , composite material
Nitroxide mediated polymerization (NMP) of methacryloisobutyl POSS (POSSMA) was conducted in a dispersed aqueous miniemulsion at 90°C, resulting in stable latexes with particle sizes = 225–260 nm at solids loading = 22%. POSSMA homopolymers withM ¯ n up to 35.9 kg mol −1 ( Đ < 1.53) was prepared using Dispolreg 007 alkoxyamine without any controlling comonomers, as is traditionally required for NMP of methacrylates. Copolymers with different ratios of POSSMA and bio‐based C13 methacrylic esters were also synthesized (monomer conversion [ X ] up to 96.5% and 1.42 < Đ < 1.68) to prepare polymer resins with a wide range of glass transition temperatures ( T g ) or melting points ( T m ) (−30°C < T g , T m < 96°C). The resulting homopolymers and copolymers exhibited semi‐crystalline properties, with crystallite size of 20.3–44.4 Å.