双甲聚碳酸盐的一步转化为阿利法性聚碳酸盐聚醇,用于生产可回收聚氨
Keita Saito1, Patrick Schara1, Fabian Eisenreich1
1Polymer Performance Materials Group, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, 5600 MB, The Netherlands.
Chemistry (Weinheim an der Bergstrasse, Germany)
|June 21, 2025
概括
这项研究将双甲多碳酸盐 (BPA-PC) 废物循环再利用成可回收的热塑性聚氨 (TPU). 这种新的工艺产生了具有出色机械性能和可回收性的高性能TPU,为循环塑料经济做出了贡献.
科学领域:
- 聚合物科学 聚合物科学
- 材料化学 材料化学
- 可持续化学 可持续化学
背景情况:
- 越来越多的塑料废物需要先进的回收解决方案.
- 双甲基聚碳酸 (BPA-PC) 是一种常见的塑料废物流.
- 热塑性聚氨 (TPU) 提供了多功能应用,但面临着寿命终结的挑战.
研究的目的:
- 开发一种可持续的方法,将BPA-PC废物转化为有价值的材料.
- 从BPA-PC合成阿里法性聚碳酸 (APC) 聚醇.
- 使用APC多聚合物生产和表征新型TPU,并评估其可回收性.
主要方法:
- 用二醇将BPA-PC废弃物单步转化为APC多聚醇.
- 通过将APC多作为软段与4,4'-甲基二二酸 (MDI) 结合而合成TPU.
- 评估TPU的机械性能,水溶性稳定性和可通过有机催化解聚合物处理回收利用性.
主要成果:
- 从BPA-PC废物中成功合成了APC多.
- TPU显示出优良的机械性能 (抗拉强度为58 MPa,破裂时的延长率为397%) 和水溶性稳定性.
- 有机催化脱聚化实现了尿和碳酸盐键的同时水解.
- 获得了高产量的4,4'-甲基乙氨酸 (MDA) (96%) 和1,4-butanediol (1,4-BD) (95%),使MDI再生成为可能.
结论:
- 这项研究提出了一种可行的一步循环升级策略,将BPA-PC废物转化为高性能,可回收的TPU.
- 开发的有机催化脱聚化为TPU提供了一种高效的闭环回收方法.
- 这种方法通过解决塑料废物和聚氨的生命周期结束管理,为循环塑料经济做出了贡献.
相关概念视频
Types of Step-Growth Polymers: Polyesters
2.3K
The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
2.3K
Step-Growth Polymerization: Overview
3.6K
Step-growth or condensation polymerization is a stepwise reaction of bi or multifunctional monomers to form long-chain polymers. As all the monomers are reactive, most of the monomers are consumed at the early stages of the reaction to form small chains of reactive oligomers, which then combine to form long polymer chains in the late stages. Hence, the reaction has to proceed for a long time to achieve high molecular weight polymers.
Many natural and synthetic polymers are produced by...
Many natural and synthetic polymers are produced by...
3.6K
Free-Radical Chain Reaction and Polymerization of Alkenes
8.2K
The conversion of alkenes to macromolecules called polymers is a reaction of high commercial importance. The structure of the polymer is defined by a repeating unit, while the terminal groups are considered insignificant. The average degree of polymerization represents the number of repeating units in the polymer molecule and is denoted by the subscript n.
8.2K
Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)
2.7K
Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
2.7K
Hydroboration-Oxidation of Alkenes
9.0K
In addition to the oxymercuration–demercuration method, which converts the alkenes to alcohols with Markovnikov orientation, a complementary hydroboration-oxidation method yields the anti-Markovnikov product. The hydroboration reaction, discovered in 1959 by H.C. Brown, involves the addition of a B–H bond of borane to an alkene giving an organoborane intermediate. The oxidation of this intermediate with basic hydrogen peroxide forms an alcohol.
9.0K
Preparation of Diols and Pinacol Rearrangement
3.5K
Compounds bearing two hydroxyl groups are known as diols. When the hydroxyl groups are located on adjacent carbon atoms, the diols are called vicinal diols or glycols. Under acidic conditions, vicinal diols undergo a specific reaction called pinacol rearrangement.
The reaction begins with transferring a proton from the acid catalyst to one of the hydroxyl groups, producing an oxonium ion.
The reaction begins with transferring a proton from the acid catalyst to one of the hydroxyl groups, producing an oxonium ion.
3.5K


