Synthesis and characterization of poly(ethylene glycol) bottlebrush networks via ring-opening metathesis polymerization.

Synthesis and characterization of poly(ethylene glycol) bottlebrush networks via ring-opening metathesis polymerization.
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DOI:
10.1002/pol.20210865
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发表时间:
2022-05-01
期刊:
Journal of polymer science (2020)
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本文报道了重叠浓度(C*)如何用于克服由于商业PEG中的二醇杂质而引起的交联,从而允许合成对分子量具有良好控制的瓶刷聚合物。此外,基于PEG的瓶刷网络通过ROMP合成,以最小的溶胶分数(<2%)获得高转化率。然后通过用磷酸盐缓冲溶液(PBS)和1-乙基-3-甲基咪唑硫酸乙酯/DCM共溶剂进行溶剂溶胀来进一步改变这些网络的结晶度和机械性质。这里报道的合成突出了瓶刷网络结构用于新材料的合理设计的潜力。
Herein it is reported how the overlap concentration (C*) can be used to overcome crosslinking due to diol impurities in commercial PEG, allowing for the synthesize of bottlebrush polymers with good control over molecular weight. Additionally, PEG-based bottlebrush networks are synthesized via ROMP, attaining high conversions with minimal sol fractions (<2%). The crystallinity and mechanical properties of these networks are then further altered by solvent swelling with phosphate buffer solution (PBS) and 1-ethyl-3-methylimidazolium ethyl sulfate/DCM cosolvents. The syntheses reported here highlight the potential of the bottlebrush network architecture for use in the rational design of new materials.
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