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- W2912061017 abstract "β-Myrcene (My), a natural 1,3-diene, and isobornyl methacrylate (IBOMA), from partially bio-based raw materials sources, were copolymerized by nitroxide-mediated polymerization (NMP) in bulk using the SG1-based BlocBuilder™ alkoxyamine functionalized with an N-succinimidyl ester group, NHS-BlocBuilder, at T = 100 °C with initial IBOMA molar feed compositions fIBOMA,0 = 0.10-0.90. Copolymer reactivity ratios were rMy = 1.90-2.16 and rIBOMA = 0.02-0.07 using Fineman-Ross, Kelen-Tudos and non-linear least-squares fitting to the Mayo-Lewis terminal model and indicated the possibility of gradient My/IBOMA copolymers. A linear increase in molecular weight versus conversion and a low dispersity (Đ ≤ 1.41) were exhibited by My/IBOMA copolymerization with fIBOMA,0 ≤ 0.80. My-rich and IBOMA-rich copolymers were shown to have a high degree of chain-end fidelity by performing subsequent chain-extensions with IBOMA and/or My, and by 31P NMR analysis. The preparation by NMP of My/IBOMA thermoplastic elastomers (TPEs), mostly bio-sourced, was then attempted. IBOMA-My-IBOMA triblock copolymers containing a minor fraction of My or styrene (S) units in the outer hard segments (Mn = 51-95 kg mol-1, Đ = 1.91-2.23 and FIBOMA = 0.28-0.36) were synthesized using SG1-terminated poly(ethylene-stat-butylene) dialkoxyamine. The micro-phase separation was suggested by the detection of two distinct Tgs at about -60 °C and +180 °C and confirmed by atomic force microscopy (AFM). A plastic stress-strain behavior (stress at break σB = 3.90 ± 0.22 MPa, elongation at break εB = 490 ± 31%) associated to an upper service temperature of about 140 °C were also highlighted for these triblock polymers." @default.
- W2912061017 created "2019-02-21" @default.
- W2912061017 creator A5017275151 @default.
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- W2912061017 date "2019-01-01" @default.
- W2912061017 modified "2023-10-03" @default.
- W2912061017 title "β-Myrcene/isobornyl methacrylate SG1 nitroxide-mediated controlled radical polymerization: synthesis and characterization of gradient, diblock and triblock copolymers" @default.
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- W2912061017 doi "https://doi.org/10.1039/c8ra09192g" @default.
- W2912061017 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/35518984" @default.
- W2912061017 hasPublicationYear "2019" @default.
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