Details

Autor(en) / Beteiligte

• Byun, Taejoon
• Kim, Seong Jong
• Kim, Sang Youl

Titel

Soluble and transparent poly(amide-imide)s with ultra-low coefficients of thermal expansion

Ist Teil von

• Polymer (Guilford), 2022-04, Vol.247, p.124813, Article 124813

Ort / Verlag

Kidlington: Elsevier Ltd

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Transparent and soluble poly(amide-imide)s (PAIs) with high dimensional stability were synthesized from the monomer consisting of a dibenzodioxin skeleton. The diimide-dicarboxylic acid monomers were synthesized from dibenzo-dioxin tricarboxylic acid anhydride and trimellitic anhydride with 2,2′-bis(trifluoromethyl)benzidine, and a series of PAIs were prepared from the polymerization of the diacid monomers with 2,2′-bis(trifluoromethyl)benzidine. All the polymers were soluble in polar organic solvents and can be solution-cast into nearly colorless and flexible freestanding films. The obtained PAI films possessed high Td5 value (469–481 °C in N2) and high transparency (∼88% transmittance at 550 nm). Interestingly, PAIs prepared in this study exhibited high thermo-dimensional stability with low CTE values as low as 1.3 ppm/°C. [Display omitted] •Soluble poly(amide-imide)s are synthesized from the rigid ladder-type monomer.•The freestanding polymer films show low CTE values around 2 ppm/°C.•The amorphous polymers having dibenzo-dioxin units have high optical transparency.