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Caryophyllene as a Precursor of Cross-Linked Materials

preprint
submitted on 02.12.2019, 11:18 and posted on 10.12.2019, 21:46 by Anderson Medeiros, Cédric Le Coz, Etienne Grau

This paper aims at the synthesis of a new type of elastomers from caryophyllene. The adopted strategy was to cross-link the polycaryophyllene, which was synthesized by ring-opening metathesis polymerization (ROMP). The polycaryophyllene obtained showed Mn = 2 x 104 g.mol-1 (Đ = 1.5) with a glass transition temperature (Tg) of -35 °C. On the first hand, thermal crosslinking was performed in the presence of organic peroxides or sulfur system. On the second hand, thiol-ene coupling initiated by UV-light at room temperature was also investigated as an alternative pathway to cross-link the polycaryophyllene. The materials obtained were analyzed by TGA, DSC, and DMA. The Tg of cross-linked polycaryophyllene could be easily modulated from -35 °C to a range between -25 and 10 °C by changing the type of cross-linking agent. The curing process led to the improvement of thermal stability ranging from 200 °C to around 340 °C. Finally, the network storage modulus varied from 1 to 100 MPa at room temperature.


Funding

Emergence@INC2019

History

Email Address of Submitting Author

egrau@enscbp.fr

Institution

LCPO University of Bordeaux / CNRS / Bordeaux INP

Country

France

ORCID For Submitting Author

0000-0003-0396-1555

Declaration of Conflict of Interest

The authors declare no competing financial or commercial conflicts of interest.

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in ACS Sustainable Chemistry & Engineering

ChemRxiv

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