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Biobased copolyesters: Synthesis, structure, thermal and mechanical properties of poly(ethylene 2,5-furandicarboxylate-co-ethylene 1,4-cyclohexanedicarboxylate)
Polymer Degradation and Stability ( IF 5.9 ) Pub Date : 2018-05-30 , DOI: 10.1016/j.polymdegradstab.2018.05.026
Xiansong Wang , Qingyin Wang , Shaoying Liu , Gongying Wang

A series of bio-based copolyesters, poly(ethylene 2,5-furandicarboxylate-co-ethylene 1,4-cyclohexanedicarboxylate)s (PEFCs) were synthesized from ethylene glycol (EG), 2,5-furandicarboxylic acid (FDCA) and 1,4-cyclohexanedicarboxylic acid (CHDA) through a two-step melt polycondensation procedure. The chemical structure, compositions and sequence distributions were determined by 1H NMR. The molecular weight, thermal properties, thermal stabilities, crystal structure and mechanical properties were investigated by GPC, DSC, TGA, WAXD, and tensile testing, respectively. All PEFCs showed the characteristic of random copolymer, and their composition could be controlled by the feed molar ratio of FDCA to CHDA. DSC results showed that PEFCs were amorphous, while increasing the content of the CHDA unit, the glass transition temperatures (Tg) of PEFCs decreased. Moreover, the thermal stabilities of all PEFCs remained unchanged. The tensile testing demonstrated that PEFC-30 was a toughened plastic with tensile modulus 801 MPa and elongation 667%.



中文翻译:

生物基共聚酯:聚(2,5-呋喃二甲酸乙烯酯-共-乙烯1,4-环己烷二羧酸酯)的合成,结构,热和机械性能

从乙二醇(EG),2,5-呋喃二甲酸(FDCA)和1 ,4-环己烷二甲酸(CHDA)通过两步熔融缩聚过程。化学结构,组成和序列分布由1确定1 H NMR。分别通过GPC,DSC,TGA,WAXD和拉伸试验研究了分子量,热性能,热稳定性,晶体结构和机械性能。所有的PEFC均表现出无规共聚物的特性,其组成可以通过FDCA与CHDA的进料摩尔比来控制。DSC结果表明,PEFC是无定形的,尽管增加CHDA单元的含量,但PEFC的玻璃化转变温度(Tg)降低。此外,所有PEFC的热稳定性均保持不变。拉伸测试表明,PEFC-30是一种增韧塑料,拉伸模量为801 MPa,伸长率为667%。

更新日期:2018-05-30
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