4D-printing of mechanically durable high-temperature shape memory polymer with good irradiation resistance

Kholkhoev, Bato Ch.; Bardakova, Kseniia N.; Nikishina, Alena N.; Matveev, Zakhar A.; Efremov, Yuri M.; Frolova, Anastasia A.; Akovantseva, Anastasiya A.; Gorenskaia, Elena N.; Verlov, Nikolay A.; Timashev, Peter S.; Burdukovskii, Vitalii F.

doi:10.1016/j.apmt.2023.102022

Cited by 1 publication

(1 citation statement)

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“…There are approaches to obtain biocompatible materials by the modification of implantable polyimide films [34] and polyimide covalent organic frameworks for drug delivery applications [35]. Photosensitive compositions based on aromatic heterochain polymers and reactive solvents can be used to form mechanically durable three-dimensional objects by laser stereolithography [36][37][38][39][40][41], digital light processing (DLP) [42][43][44][45][46][47] and liquid crystal display (LCD) [48][49][50] 3D printing.…”

Section: Introductionmentioning

confidence: 99%

Soluble Fluorinated Cardo Copolyimide as an Effective Additive to Photopolymerizable Compositions Based on Di(meth)acrylates: Application for Highly Thermostable Primary Protective Coating of Silica Optical Fiber

Sapozhnikov,

Melnik,

Chuchalov

et al. 2024

IJMS

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The development of photocurable compositions is in high demand for the manufacture of functional materials for electronics, optics, medicine, energy, etc. The properties of the final photo-cured material are primarily determined by the initial mixture, which needs to be tuned for each application. In this study we propose to use simple systems based on di(meth)acrylate, polyimide and photoinitiator for the preparation of new photo-curable compositions. It was established that a fluorinated cardo copolyimide (FCPI) based on 2,2-bis-(3,4-dicarboxydiphenyl)hexafluoropropane dianhydride, 9,9-bis-(4-aminophenyl)fluorene and 2,2-bis-(4-aminophenyl)hexafluoropropane (1.00:0.75:0.25 mol) has excellent solubility in di(met)acrylates. This made it possible to prepare solutions of FCPI in such monomers, to study the effect of FCPI on the kinetics of their photopolymerization in situ and the properties of the resulting polymers. According to the obtained data, the solutions of FCPI (23 wt.%) in 1,4-butanediol diacrylate (BDDA) and FCPI (15 wt.%) in tetraethylene glycol diacrylate were tested for the formation of the primary protective coatings of the silica optical fibers. It was found that the new coating of poly(BDDA–FCPI23%) can withstand prolonged annealing at 200 °C (72 h), which is comparable or superior to the known most thermally stable photo-curable coatings. The proposed approach can be applied to obtain other functional materials.

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