A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Rigid biobased polycarbonates with good processability based on a spirocyclic diol derived from citric acid (2020)
Bonjour, O., Liblikas, I., Pehk, T., Khai-Nghi, T., Rissanen, K., Vares, L., & Jannasch, P. (2020). Rigid biobased polycarbonates with good processability based on a spirocyclic diol derived from citric acid. Green Chemistry, 22(12), 3940-3951. https://doi.org/10.1039/d0gc00849d
JYU-tekijät tai -toimittajat
Julkaisun tiedot
Julkaisun kaikki tekijät tai toimittajat: Bonjour, Olivier; Liblikas, Ilme; Pehk, Tõnis; Khai-Nghi, Truong; Rissanen, Kari; Vares, Lauri; Jannasch, Patric
Lehti tai sarja: Green Chemistry
ISSN: 1463-9262
eISSN: 1463-9270
Julkaisuvuosi: 2020
Volyymi: 22
Lehden numero: 12
Artikkelin sivunumerot: 3940-3951
Kustantaja: Royal Society of Chemistry
Julkaisumaa: Britannia
Julkaisun kieli: englanti
DOI: https://doi.org/10.1039/d0gc00849d
Julkaisun avoin saatavuus: Avoimesti saatavilla
Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava
Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/71209
Tiivistelmä
Introducing biobased polymers from renewable sources for use as high-performance thermoplastics with high demands on mechanical rigidity, transparency, thermal stability, as well as good processability, is a significant challenge. In the present work we have designed and prepared a rigid biobased bis-spirocylic diol by di-cycloketalization of a bicyclic diketone (cis-bicyclo[3.3.0]octane-3,7-dione, obtained from citric acid) using trimethylolpropane. This spiro-diol monomer has two reactive primary hydroxyl groups and the synthesis from inexpensive biobased starting materials is straightforward and readily upscalable, involving no chromatographic purification. In order to explore the usefulness of the new monomer, it was employed in melt polycondensations with diphenylcarbonate at up to 280 °C to form rigid fully amorphous polycarbonates (PCs). Molecular weights (MWs) up to Mn = 28 kg mol−1 were achieved, and thermal and dynamic mechanical measurements showed glass transitions up to Tg = 100 °C, with no thermal decomposition until Td ∼350 °C. Solvent cast films had excellent mechanical flexibility and strength, as well as a high transparency with only slight coloration. Results by dynamic melt rheology implied that the high-MW PCs had a good processability at 170 °C, with a stable shear modulus over time, but started to degrade via chain scission reactions when the temperature approached 200 °C. In conclusion, the present work demonstrates the straightforward preparation of the citric acid-based spiro-diol, and indicates that it is an efficient building block for the preparation of rigid biobased PCs and other condensation polymers.
YSO-asiasanat: polymeerikemia; polymeerit; biomuovi; kestomuovi
Liittyvät organisaatiot
OKM-raportointi: Kyllä
Raportointivuosi: 2020
JUFO-taso: 3
