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High performance thiol-ene thermosets based on fully bio-based poly(limonene carbonate)s
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.ORCID iD: 0000-0003-3201-5138
2017 (English)In: European Polymer Journal, ISSN 0014-3057, E-ISSN 1873-1945, Vol. 96, 337-349 p.Article in journal (Refereed) Published
Abstract [en]

High glass transition temperature (Tg) thiol-ene networks (TENs) based on poly(limonene carbonate)s (PLCs), derived from orange oils and of potential degradability are described here. PLCs with moderate molecular weight were prepared by copolymerization of limonene oxide with CO2 and subsequent breakdown reactions. These PLCs were cured with multifunctional thiol monomers in the presence of thermal initiators via thiol-ene chemistry to generate poly(thioether-cocarbonate) networks. The thermal curing experiments were optimized by a kinetic study using real-time ATR-FTIR, in which a delayed gelation was observed. For the first time, an interesting "cage" effect was observed during the network formation initiated by DCP, in which the addition reactions of pendant isopropenyls on high molecular weight PLC chains were significantly enhanced by thiol-ene crosslinking at 160 degrees C. The resulting homogeneous TENs with high T(g)s (> 100 degrees C) and a wide range of thermomechanical properties, including rubbery moduli from 2.9 to 28.2 MPa, were obtained. The TENs also showed promising properties such as high transparency, good acetone resistance and high hardness, suggesting their potential application in coatings.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 96, 337-349 p.
National Category
Polymer Technologies
Identifiers
URN: urn:nbn:se:kth:diva-218229DOI: 10.1016/j.eurpolymj.2017.09.034ISI: 000414887700029Scopus ID: 2-s2.0-8503010479OAI: oai:DiVA.org:kth-218229DiVA: diva2:1160794
Note

QC 20171128

Available from: 2017-11-28 Created: 2017-11-28 Last updated: 2017-11-28Bibliographically approved

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Johansson, Mats

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CiteExportLink to record
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