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Creators/Authors contains: "Nwoko, Tochukwu"

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  1. ; ; ; ; ; ; ; ; ; ; et al (, ACS Macro Letters)
    Vinyl ketone polymers, including poly(phenyl vinyl ketone) and poly(p-chlorophenyl vinyl ketone) were successfully synthesized under light using atom transfer radical polymerization (ATRP). This marks the first successful attempt at ATRP of vinyl ketones. The polymerization kinetics revealed chain growth and maintained livingness, as further evidenced by successful chain extension using ethyl acrylate. The efficient main-chain cleavability of the polymers was confirmed under UV light. While the attainment of low dispersity remains an enduring challenge, this work offers promising potential for future success. 
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  2. ; ; (, Chemical Science)
    The interaction of light with polymers can be positive, where light enhances polymerization or performance, but it can also be negative towards the targeted properties. Positive and negative interactions between polymers and light are highlighted. 
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  3. ; ; ; ; (, Macromolecules)
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  4. ; ; ; ; (, Polymer Chemistry)
    The RAFT rate retardation effect is used to classify monomers according to their reactivity. The stability of the radical correlates inversely with the extent of retardation allowing a framework for classifying monomer reactivity to be established. 
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  5. ; ; ; ; ; ; (, Chemical Engineering Journal)
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  6. ; ; ; ; (, Polymer Chemistry)
    The choice of chain transfer agent in reversible addition/fragmentation chain transfer polymerization has proven to be instrumental in modulating the dispersity of a certain polyphenyl vinyl ketone (PVK). The monomer, PVK, which can self-initiate when exposed to blue light, was used to synthesize homopolymers, block copolymers by extending with a different monomer and gradient polymers. Regardless of the polymer architecture or degree of polymerization, a consistent trend in polymer dispersity was quantified, with higher loadings of the less active chain transfer agent xanthate leading to higher dispersities. The dispersity could be further modulated by photodegradation of vinyl ketone polymers under UV irradiation. 
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