3-Ethylidene-6-vinyltetrahydro-2H-pyran-2-one, a divinyl δ-lactone derived from CO2 and 1,3-butadiene, is used for the synthesis of networks with various compositions through the thiol-ene click reaction with di- and tri-thiol compounds. Thermal, mechanical, and optical properties of the networks are characterized. The networks have sharp and uniform glass transitions and show good thermal stability with T d from 287 to 332 °C. Mechanical properties of the networks can be adjusted by the cross-link density; 6.18 MPa of tensile strength, 574% break elongation and 1.84 of tan δ at maximum are reached. Metal complexation makes the networks tougher due to additional cross-links. The highly homogeneous networks are transparent with average 90% transmittance of visible light, and of decent refractive indices around 1.55. Swelling-induced twist shape transformation and visible QR code under UV light is realized by pattern of the network.
Synthesis and Properties of Networks Based on Thiol-ene Chemistry Using a CO2 -Based δ-Lactone.
Lifeng Chen,Jun Ling,Xufeng Ni,Zhi-quan Shen
Published 2018 in Macromolecular rapid communications
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- Publication year
2018
- Venue
Macromolecular rapid communications
- Publication date
2018-08-17
- Fields of study
Medicine, Materials Science, Chemistry
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Semantic Scholar, PubMed
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