Polymer Degradation and Stability ( IF 5.9 ) Pub Date : 2021-08-28 , DOI: 10.1016/j.polymdegradstab.2021.109706 Yunfan Zhang 1 , Yukiko Enomoto 1 , Tadahisa Iwata 1
Divanillic acid, the dimer of vanillic acid, has been widely used as an aromatic building block of bio-based polymers. In this study, a series of homo- and copolyesters composed of a methylated dialkoxydivanillic acid monomer with an alkoxy side-chain length of 1 or 4 carbon units, cyclohexanedimethanol, and an alkanediol with a chain length of 6, 8, or 12 carbon units was synthesized. The polyesters obtained exhibited high weight-average molecular weights in the range of 4.4 × 104 to 20 × 104 g/mol and degradation temperatures higher than 380 °C. Thermo-pressed films were prepared from all the polyesters. Their glass transition temperature and elongation-at-break values could be tuned from −1 to 120 °C and 3% to 1500%, respectively, by changing the lengths of the alkoxy side chain and the alkanediol as well as the composition of the copolyester.
中文翻译:
含有二香草酸、1,4-环己烷二甲醇和链烷二醇的均聚酯和共聚酯的合成及其热和机械性能
二香草酸是香草酸的二聚体,已被广泛用作生物基聚合物的芳族结构单元。在本研究中,一系列均聚酯和共聚酯由烷氧基侧链长度为 1 或 4 个碳单元的甲基化二烷氧基二香草酸单体、环己烷二甲醇和链长为 6、8 或 12 个碳单元的烷二醇组成被合成。获得的聚酯表现出在 4.4 × 10 4至 20 × 10 4范围内的高重均分子量g/mol 和降解温度高于 380 °C。热压薄膜由所有聚酯制成。通过改变烷氧基侧链和链烷二醇的长度以及共聚酯的组成,它们的玻璃化转变温度和断裂伸长率值可以分别在 -1 到 120 °C 和 3% 到 1500% 之间进行调整.