Department of Chemistry and Macromolecular Science and Engineering Program , University of Michigan , Ann Arbor , Michigan 48109-1055 , United States.
Department of Chemistry and Beckman Institute for Advanced Science and Technology , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States.
J Am Chem Soc. 2019 Sep 18;141(37):14544-14548. doi: 10.1021/jacs.9b07508. Epub 2019 Sep 4.
Polymers that depolymerize back to monomers can be repeatedly chemically recycled, thereby reducing their environmental impact. Polyphthalaldehyde is a metastable polymer that can rapidly and quantitatively depolymerize due to its low ceiling temperature. However, the effect of substitution on the physical and chemical properties of polyphthalaldehyde derivatives has not been systematically studied. Herein, we investigate the cationic polymerization of seven -phthalaldehyde derivatives and demonstrate that judicious choice of substituent results in materials with a wide range of ceiling temperatures (<-60 to 106 °C) and decomposition temperatures (109-196 °C). We anticipate that these new polymers and their derivatives will enable researchers to access degradable materials with tunable thermal, physical, and chemical properties.
可解聚回单体的聚合物可以进行反复的化学回收，从而降低其对环境的影响。聚邻苯二甲醛是一种亚稳态聚合物，由于其低温上限，可快速且定量地解聚。然而，取代基对聚邻苯二甲醛衍生物的物理和化学性质的影响尚未得到系统研究。在此，我们研究了七种邻苯二甲醛衍生物的阳离子聚合，并证明了取代基的合理选择可得到具有较宽上限温度（<-60 至 106°C）和分解温度（109-196°C）的材料。我们预计，这些新型聚合物及其衍生物将使研究人员能够获得具有可调热、物理和化学性能的可降解材料。
