Constrained thermoresponsive polymers – new insights into fundamentals and applications

• Patricia Flemming,
• Alexander S. Münch,
• Andreas Fery and
• Petra Uhlmann

Beilstein J. Org. Chem. 2021, 17, 2123–2163, doi:10.3762/bjoc.17.138

Olefin metathesis in multiblock copolymer synthesis

• Maria L. Gringolts,
• Yulia I. Denisova,
• Eugene Sh. Finkelshtein and
• Yaroslav V. Kudryavtsev

Beilstein J. Org. Chem. 2019, 15, 218–235, doi:10.3762/bjoc.15.21

• Maria L. Gringolts Yulia I. Denisova Eugene Sh. Finkelshtein Yaroslav V. Kudryavtsev Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky prosp. 29, 119991 Moscow, Russia 10.3762/bjoc.15.21 Abstract Multiblock copolymers constitute a basis for an emerging class of

• nanomaterials that combine various functional properties with durability and enhanced mechanical characteristics. Our mini-review addresses synthetic approaches to the design of multiblock copolymers from unsaturated monomers and polymers using olefin metathesis reactions and other ways of chemical modification

• topic attracts special interest due to its relative simplicity and broad opportunities to tailor the structure and hence the properties of the copolymer products. Whenever possible, we analyze the structure–property relations for multiblock copolymers and point to their possible practical applications

Self-assemblies of γ-CDs with pentablock copolymers PMA-PPO-PEO-PPO-PMA and endcapping via atom transfer radical polymerization of 2-methacryloyloxyethyl phosphorylcholine

• Jing Lin,
• Tao Kong,
• Lin Ye,
• Ai-ying Zhang and
• Zeng-guo Feng

Beilstein J. Org. Chem. 2015, 11, 2267–2277, doi:10.3762/bjoc.11.247

• architecture of the resulting PPRs, the second in situ ATRP of 2-methacryloyloxyethyl phosphorylcholine (MPC) was conducted to endcap them into the same conformational PR-based multiblock copolymers. A schematic description on the self-assembly evolution of varying amounts of γ-CDs with PMA-PPO-PEO-PPO-PMA and

• multiblock copolymers are ascribed as PRmCDnP, where m and n stand for the feed molar ratio of γ-CD and MPC to PEP40M, respectively. The compositions, GPC data and yields are summarized in Table 3. As can be seen, the experimental molar ratio of γ-CD to PEP40M varied in the range of 5–8 and a feed molar

• PEP100M15CD. It was shown that at a feed molar ratio 15:1 of γ-CD to PEP100M, the supramolecular structure of PEP100M15CD changed from the PEO-bent double-chain-stranded tight-fit PPR into the single-chain-stranded loose-fit one. The WXRD patterns of the resulting PR-based multiblock copolymers are also shown