Reprocessable and Recyclable Crosslinked Polyethylene with Triple Shape Memory Effect

被引：73

作者：

Ji, Fance ^{[1
,2
]}

Liu, Xiangdong ^{[1
]}

Lin, Changhong ^{[1
,2
]}

Zhou, Yan ^{[1
,3
]}

Dong, Li ^{[1
,3
]}

Xu, Shaobin ^{[1
,3
]}

Sheng, Dekun ^{[1
]}

Yang, Yuming ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, Polymer Composites Engn Lab, 5625 Renmin St, Changchun 130022, Jilin, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China

来源：

MACROMOLECULAR MATERIALS AND ENGINEERING | 2019年 / 304卷 / 03期

关键词：

exchangeable covalent bonds; multi-shape memory effect; polyolefins vitrimers; thermosetting polymers; NETWORKS; POLYURETHANE; VITRIMERS;

D O I：

10.1002/mame.201800528

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Thermosetting polymers, such as epoxy resins, have found widespread applications because of their excellent thermomechanical and solvent resistance properties. However, the recycling of thermosets remains a challenge, due to the irreversible covalent crosslinking bonds in the network. The exchangeable covalent bonds in vitrimers open opportunities in the way that materials can be dynamically repaired. However, in the case of polyolefins, the strategy of exchangeable vitrimers is still underexplored. Herein, a simple way is reported to prepare a high-density polyethylene (HDPE) vitrimer with a triple shape memory effect, where exchangeable esters are introduced into the network of covalently crosslinked HDPE. With the incorporation of polyethers or polyesters into the crosslinked network, the two obtained vitrimers show outstanding recyclability and a good triple shape memory effect. This new strategy of preparing an HDPE vitrimer might allow the high-value utilization of crosslinked polyolefins.

引用

页数：8

共 40 条

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