Polyethyleneketones with Controlled Spacer Units: Synthesis, Characterization, and Photodegradation DOI
Matthias Nobis, Kohei Takahashi, Junya Uchida

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: May 13, 2025

In this study, a new synthetic method for structurally controlled polyethyleneketones, photodegradable polyethylene-like polymer, has been developed. Telechelic Zn-polyethylene was prepared from α,ω-diene, diethylzinc, and ethylene, which allowed to react with diacid chlorides give polyethyleneketones defined spacing between the neighboring ketone functionalities. The photodegradation of these polymers under UV light demonstrated degradation rate dependency on spacer units carbonyl groups. ones longer-spaced ketones (6-18 carbons) showed efficient degradation, while shorter-spaced (3-5 exhibited slower process. Structural analysis by solid-state FT-IR DSC suggested existence carbonyl-carbonyl interactions in polymers, are presumed interfere via Norrish reaction.

Language: Английский

Synthesis and self-assembly of a diblock copolymer consisting of a cyclic olefin copolymer and polycaprolactone DOI

Yu-Kai Chuang,

Jing-Wen Su,

Yu-Chuan Sung

et al.

Polymer Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Cyclic olefin copolymer- block -polycaprolactone was prepared through a metallocene-catalyst mediated selective chain transfer pathway. The resulting diblock copolymer can self-organize into an ordered nanopattern molecular self-assembly.

Language: Английский

Citations

0
Polyethyleneketones with Controlled Spacer Units: Synthesis, Characterization, and Photodegradation DOI
Matthias Nobis, Kohei Takahashi, Junya Uchida

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: May 13, 2025

In this study, a new synthetic method for structurally controlled polyethyleneketones, photodegradable polyethylene-like polymer, has been developed. Telechelic Zn-polyethylene was prepared from α,ω-diene, diethylzinc, and ethylene, which allowed to react with diacid chlorides give polyethyleneketones defined spacing between the neighboring ketone functionalities. The photodegradation of these polymers under UV light demonstrated degradation rate dependency on spacer units carbonyl groups. ones longer-spaced ketones (6-18 carbons) showed efficient degradation, while shorter-spaced (3-5 exhibited slower process. Structural analysis by solid-state FT-IR DSC suggested existence carbonyl-carbonyl interactions in polymers, are presumed interfere via Norrish reaction.

Language: Английский

Citations

0