来自聚乙烯的混合二碳酸作为合成聚的原料
Tom J Smak1, Hugo Aalders1, Rijk van Bruggen2
1Inorganic Chemistry and Catalysis Group, Institute for Sustainable and Circular Chemistry, Faculty of Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands.
概括
将聚乙烯 (PE) 废弃物回收成混合二碳酸,用于聚合成,可提高生物降解性,但降低化温度. 使用像 bis-hydroxyethyl terephthalate (BHET) 这样的刚性二醇可以恢复热性能.
科学领域:
- 聚合物化学 聚合物化学
- 可持续材料科学科学 可持续材料科学
- 化学回收利用 化学回收利用 化学回收利用
背景情况:
- 目前的线性塑料价值链严重依赖化石燃料.
- 聚乙烯 (PE) 废弃物的氧化转化为二碳酸单体提供了一条途径.
- 一个挑战是从PE废物中生产混合链长度二碳酸.
研究的目的:
- 调查混合二碳酸在聚合成中的直接应用.
- 为了评估不同链条长度和二碳酸的分布对聚的特性的影响.
- 探索PE衍生混合二碳酸的潜力,以创造新型聚合物.
主要方法:
- 合成使用1,4-butanediol和二碳酸 (C4-C10) 的阿里法性聚合物,其链长度分布不同.
- 从PE衍生的混合二糖酸合成聚.
- 使用差分扫描热度计 (DSC),凝透色谱 (GPC),X射线衍射 (XRD),红外 (IR) 光谱,核磁共振 (NMR) 和热重力测量分析 (TGA) 的表征.
主要成果:
- 从混合二碳酸原料中合成的聚烯表现出增强的生物降解性.
- 观察到,这些聚合物的化温度比从单链二碳酸中合成的更低.
- 使用更硬的二醇,双基乙二甲 (BHET),有效地弥补了降低的化温度.
结论:
- 从聚乙烯废物中提取的混合二碳酸可直接用于聚合成.
- 由此产生的聚烯显示出更好的生物降解性,尽管点降低.
- 可以使用BHET等二醇的战略选择来定制这些可持续聚合物的热性能.
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