Innocuous solvent-based, low-temperature curable, and high transparency photosensitive polyimides developed by soluble polyimides containing bio-based magnolol moieties

Chemical Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Traditional photosensitive polyimide (PSPI) materials require a high curing temperature and exhibit low transparency, limiting their applications in thermally sensitive optical devices. To overcome this challenge, soluble resins were synthesized based on the structural design of bio-based magnolol monomer. It is noteworthy that PI photoresist, developed by using as-prepared polyimides non-toxic solvents (2-acetoxy-1-methoxypropane, PGEMA) other additives, demonstrated an impressive low-temperature performance (180 °C). Furthermore, solvent residue cured film prepared PGEMA as was markedly decreased compared to N-methyl pyrrolidone (NMP). In addition, C-PI-3 films photoinitiated thiol-ene radical reactions exhibited transparency with average visible light transmittance 87.8%, well excellent thermal stability, dielectric breakdown properties, photo-patterning capabilities. This partially innocuous solvent-based PSPI curability properties could be pioneering example resolve challenges energy efficiency environmental sustainability expected used field color filters.

Language: Английский

---

Optical, Dielectric, and Thermal Properties of Bio‐Based Polyimides Derived from An Isosorbide‐Containing Diamine

Macromolecular Rapid Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 9, 2025

Abstract The need for functional polymers derived from plant‐based materials has increased a carbon‐neutral perspective. Herein, six different semialicyclic isosorbide‐containing diamine‐based polyimides (ISSD‐PIs) are synthesized by incorporating isosorbide (ISS), which is D‐glucose derivative, into the diamine moiety to investigate relationship between chemical structure and optical, thermal, dielectric properties. Compared with conventional fully aromatic PIs, such as Kapton, as‐prepared ISSD‐PIs demonstrate excellent optical transparency, low refractive indices (1.554–1.633), birefringence (0.0084–0.0348) at 1310 nm, constants (2.93–3.36) moderate dissipation factors (0.0112–0.0267) 10 GHz. They also exhibit thermal stability, glass transition temperatures exceeding 250 °C 5% decomposition 400 °C. chirality of ISS skeleton remains intact, displaying characteristic circular dichroism. This study shows that incorporation PI chains enhances their properties while maintaining stability increasing free volume reducing intermolecular interactions. In addition, physical more dependent on rigidity dianhydride moiety, directly affects molecular packing chains, rather than moiety.

Language: Английский

---

Microwave-assisted catalytic upgrading of 2,5-hexanedione to 2,5-dimethyltetrahydrofuran over metal triflate under H2-free conditions

Industrial Crops and Products, Journal Year: 2025, Volume and Issue: 226, P. 120741 - 120741

Published: Feb. 22, 2025

Language: Английский

---

Biobased and Negative-Type Photosensitive Polyimides with Low Dielectric Constant and Dissipation Factor Formulated by Using a Photobase Generator

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 22, 2025

Language: Английский

---

Highly thermally stable polyhedral oligomeric silsesquioxane based on diacetal-functionalized polybenzoxazine nanocomposites

European Polymer Journal, Journal Year: 2024, Volume and Issue: 223, P. 113649 - 113649

Published: Dec. 12, 2024

Language: Английский

---