Issue 24, 2022

Synthesis of a triptycene-containing dioxazine benzoxazine monomer and a main-chain triptycene-polydimethysiloxane-benzoxazine copolymer with excellent comprehensive properties

Abstract

A novel triptycene-containing dioxazine benzoxazine monomer (TB-al) and a main-chain triptycene-containing dioxazine benzoxazine copolymer (poly(triptycene-containing dioxazine benzoxazine-co-polydimethylsiloxane), TB-al-co-PDMS) have been synthesized and fully characterized. Polymerization of the monomer, TB-al, and the copolymer, TB-al-co-PDMS, was studied by in situ FT-IR and DSC. Fire-related properties and thermal stability of the resulting thermosets were evaluated by TGA and micro-scale combustion calorimetry (MCC). The obtained thermosets, poly(TB-al) and poly(TB-al-co-PDMS), exhibit outstanding thermal stability with Td10 values of 320 and 450 °C, char yields of 44 and 72% at 800 °C, low flammability as determined by HRC, affording values of 69.6 and 31.6 J g−1 K−1, and THR values of 10.5 and 9.4 kJ g−1, respectively. Remarkably, poly(TB-al-co-PDMS) presents excellent dielectric performance with a dielectric constant of 2.37 at 1 MHz and good hydrophobicity revealed by the low water uptake value of 0.056% after 120 h of sample immersion in water at room temperature. The combined properties and advantages of these triptycene-based thermosets (poly(TB-al) and poly(TB-al-co-PDMS)) clearly indicate their great potential for applications in the field of high-performance polymers.

Graphical abstract: Synthesis of a triptycene-containing dioxazine benzoxazine monomer and a main-chain triptycene-polydimethysiloxane-benzoxazine copolymer with excellent comprehensive properties

Supplementary files

Article information

Article type
Paper
Submitted
23 ফেব্রু 2022
Accepted
29 এপ্রিল 2022
First published
30 মে 2022

Polym. Chem., 2022,13, 3639-3649

Synthesis of a triptycene-containing dioxazine benzoxazine monomer and a main-chain triptycene-polydimethysiloxane-benzoxazine copolymer with excellent comprehensive properties

R. Yang, L. Xie, N. Li, P. Froimowicz and K. Zhang, Polym. Chem., 2022, 13, 3639 DOI: 10.1039/D2PY00244B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements