| 薛梦想,董建勋,梁政勇.化学通报,2025,88(11):1214-1220. |
| 聚碳酸亚环己酯材料的化学改性研究 |
| Research on the chemistry modification of poly(cyclohexene carbonate) |
| 投稿时间：2025-03-29 修订日期：2025-06-30 |
| DOI： |
| 中文关键词: 聚碳酸亚环己酯 化学改性 环氧氯丙烷 三元共聚 性质调节 |
| 英文关键词:Poly(cyclohexene carbonate), Chemistry modification, Epichlorohydrin, Terpolymerization |
| 基金项目:河南省高等学校重点科研项目计划(22A530009)、炼焦煤资源绿色开发全国重点实验室开放课题(41041220201132T)资助 |
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| 中文摘要: |
| 聚碳酸亚环己酯(PCHC)是CO2与环氧环己烷(CHO)的交替共聚物,是一种硬脆性材料,成型加工困难,因此需对其进行改性。其中引入第三单体进行化学改性是一条有效途径,本文采用环氧氯丙烷(ECH)为第三共聚单体来对PCHC进行性能改进,成功得了系列CO2/CHO/ECH三元共聚物,并对其结构和相关性质进行了研究。结果表明,该三元聚酯物为无规共聚物,在优化条件下所得样品的数均分子量在20kg/mol,多分散性指数1.5~1.6。聚合物的性质与聚合过程ECH的加入量有较大的相关性,随着ECH量比的增加,所得聚合物的热分解温度逐渐升高,当ECH:CHO=5:5时,聚合物的起始分解温度提升至338℃,热稳定性显著增强；而玻璃化转变温度则逐渐降低,并在ECH:CHO=5:5时,下降至92℃,有利于成型加工。机械力学性能测试表明,ECH:CHO=3:7时所得聚合物材料,其拉伸强度高达42.4MPa,相应的断裂伸长率为55.3%,在此实验条件下，综合力学性能表现最佳。 |
| 英文摘要: |
| Poly(cyclohexene carbonate) (PCHC), an alternating copolymer of CO2 and cyclohexene oxide (CHO), is a rigid and brittle material that poses challenges in molding processing. So it is necessary to modify PCHC in order to expand its use. Among various approaches, chemical modification via the introduction of a third monomer is an effective method. In this study, epichlorohydrin (ECH) was employed as the third copolymer monomer to enhance the performance of PCHC, resulting in a series of CO2/CHO/ECH terpolymers. The structure and related properties of these polymers were investigated systematically. The results indicated that the terpolymer is a random copolymer, and the terpolymer samples prepared under optimized conditions possess a quality characterized by a number-average molecular weight of approximately 20kg/mol and a polydispersity index of between 1.5 and 1.6. The properties of the terpolymer are closely related to the amount of ECH added during polymerization. As the ECH ratio increases, the thermal decomposition temperature of the resulting polymer gradually rises. Specifically, when the ECH:CHO ratio is 5:5, the initial decomposition temperature of the polymer increases to 338℃, marking a significant enhancement in thermal stability. Conversely, the glass transition temperature decreases gradually and eventually reaches 92℃, which is beneficial for molding processing. Mechanical testing reveals that the terpolymer sample obtained at an ECH:CHO ratio of 3:7 exhibits the best overall mechanical properties under this experimental conditions, with a tensile strength of up to 42.4MPa and a corresponding elongation at break of 55.3%. |
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