Department of Chemical Engineering, College of Engineering, Hanyang University , Seoul 133-791, Republic of Korea.
Biomacromolecules. 2017 Aug 14;18(8):2633-2639. doi: 10.1021/acs.biomac.7b00761. Epub 2017 Jul 21.
2,2:3,3-Bis(4'-hydroxymethylethylenedioxy)-1,7,7-trimethylbicyclo[2.2.1]heptane, abbreviated as CaG, is a compound obtained by transforming a ketone group to a ketal group with camphorquinone and glycerol. The CaG diol has a complex and rigid structure and two primary hydroxyl groups. A polyester series was synthesized with the CaG diol, ethylene glycol, and dimethyl terephthalate. The polyesters exhibited adequate thermal stability up to nearly 330 °C and had a high T, which steadily increased from 78 to 129 °C as the content of CaG increased. A high proportion of the CaG moiety led to an amorphous region that is susceptible to hydrolysis and promoted degradation of the polyester in acidic conditions. Depending on the proportion of CaG in the polymer, the hydrolytic degradation of the polyesters was adjustable.
2,2:3,3-双(4'-羟甲基乙基二氧代)-1,7,7-三甲基双环[2.2.1]庚烷，简称 CaG，是一种通过用樟脑醌和甘油将酮基转化为缩酮基而获得的化合物。CaG 二醇具有复杂而刚性的结构和两个仲羟基。用 CaG 二醇、乙二醇和对苯二甲酸二甲酯合成了一系列聚酯。这些聚酯表现出足够的热稳定性，高达近 330°C，并且 Tg 很高，随着 CaG 含量的增加，从 78°C 稳步增加到 129°C。CaG 部分的高比例导致易于水解的无定形区域，并在酸性条件下促进聚酯的降解。根据聚合物中 CaG 的比例，聚酯的水解降解是可调的。
