当前位置: X-MOL 学术Macromol. Rapid Commun. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Catalyst-Free Vitrimer Cross-Linked by Biomass-Derived Compounds with Mechanical Robustness, Reprocessability, and Multishape Memory Effects
Macromolecular Rapid Communications ( IF 4.6 ) Pub Date : 2021-09-15 , DOI: 10.1002/marc.202100432
Lingyun Huang 1, 2 , Yinxin Yang 1, 2 , Zhen Niu 1, 2 , Ruiyao Wu 1, 2 , Weifeng Fan 1 , Quanquan Dai 1 , Jianyun He 1 , Chenxi Bai 1, 2
Affiliation  

Vitrimerization of thermoset polymers plays an important role in addressing resource recovery and reuse. Vitrimer elastomers with good mechanical properties often require well-designed crosslinking agents or fillers, but this increases processing complexity or reduces vitrimer dynamic properties. In this report, a simple green strategy to build a strong vitrimer elastomer is designed. Commercially available epoxidized natural rubber (ENR) is cross-linked with biomass-derived D-Fructose 1,6-bisphosphoric acid to get a vitrimer elastomer cross-linked by β-hydroxy phosphate ester bonds and has abundant hydrogen bonds. Hydrogen bonds can preferentially break and dissipate energy under external forces, which makes the sample robust. The topological network can be reformed at high temperatures through the dynamic exchange of β-hydroxy phosphate ester bonds, which gives the material malleability and recyclability. In addition, through the strategy of combining reprocessing and welding, multiple shape memory effects can be achieved in one postprocessing step. Considering that a variety of commercially available epoxy polymers are easily available, it is believed that this strategy can be a simple and versatile way to enable commercial epoxy polymers to achieve green crosslinking through biomass crosslink agents, which results in robust and recyclable vitrimers based on β-hydroxy phosphate bonds.

中文翻译:

由生物质衍生化合物交联的无催化剂 Vitrimer 具有机械稳健性、可再加工性和多形状记忆效应

热固性聚合物的玻璃化在解决资源回收和再利用方面发挥着重要作用。具有良好机械性能的玻璃体弹性体通常需要精心设计的交联剂或填料,但这会增加加工复杂性或降低玻璃体的动态性能。在本报告中,设计了一种简单的绿色策略来构建强玻璃体弹性体。市售的环氧化天然橡胶 (ENR) 与生物质衍生的 D-果糖 1,6-二磷酸交联,得到由β交联的玻璃体弹性体-羟基磷酸酯键并具有丰富的氢键。氢键在外力作用下可以优先断裂和耗散能量,这使得样品坚固耐用。通过β的动态交换可以在高温下改造拓扑网络-羟基磷酸酯键,赋予材料延展性和可回收性。此外,通过再加工和焊接相结合的策略,可以在一个后加工步骤中实现多种形状记忆效果。考虑到多种市售环氧聚合物易于获得,相信该策略可以是一种简单而通用的方法,使商用环氧聚合物通过生物质交联剂实现绿色交联,从而产生基于β的坚固且可回收的玻璃体-羟基磷酸键。
更新日期:2021-11-04
down
wechat
bug