Highly Sensitive Photocrosslinking System Using Fluorene Derivatives Having Vinyl Ether or Epoxy Moiety

Poly(phenylene thioether)s with Fluorene-Based Cardo Structure toward High Transparency, High Refractive Index, and Low Birefringence

“…In particular, the P1 , P3 , and P4 films exhibited the excellent transparency of 95% at 400 nm. Among transparent polymers with a fluorene-based cardo structure, P1 – P4 showed some of the highest transparency values. − The flexible linkage of the polymer backbone (ester, ether, and thioether linkages) and/or high contents of bulky fluorene units in the polymer repeating units may prevent interchain packing, contributing to the excellent transparency of P1 – P4 . Furthermore, it should be noted that the excellent transparency was maintained even after a harsh thermal treatment (at 200 °C for 6 h under a nitrogen atmosphere) due to the high thermal stability (Figures S3 and S4).…”

“…A cardo structure consisting of a 9,9-diaryl-substituted fluorene skeleton is significant for realizing a small Δ n value. − Δ n is defined as Δ n = n ∥ – n ⊥ , where n ∥ and n ⊥ are respectively the refractive indices for linearly polarized light parallel and perpendicular to the orientation direction . As for a polymer with a fluorene-based cardo structure in the main chain, the polymer backbone and fluorene skeleton are mutually orthogonal.…”

9,9-Diarylfluorene-Based Poly(alkyl aryl ether)s: Synthesis and Property

“…Meanwhile, such polymers also display excellent filler-dispersing ability [10][11][12] in addition to their high thermal stability, [13][14][15][16] high solubility, [17][18][19] and so on. [20][21][22][23][24][25] We have recently reported the special -interaction of the 9,9-diarylfluorene moiety in the matrix polymers toward -face of the carbon fillers.26 Although many polymers possessing 9,9-diarylfluorene moieties in the main chain have been developed to date, there is no study on polyethers. Polyethers are an important class of high performance engineering thermoplastics with a favorable combination of physical, mechanical, and chemical properties, other than processability, [31][32][33][34][35][36][37][38][39][40][41] and are easily synthesized usually by the polycondensation of diols and ditopic electrophiles.…”

“…Meanwhile, such polymers also display excellent filler-dispersing ability [10][11][12] in addition to their high thermal stability, [13][14][15][16] high solubility, [17][18][19] and so on. [20][21][22][23][24][25] We have recently reported the special -interaction of the 9,9-diarylfluorene moiety in the matrix polymers toward -face of the carbon fillers. 26 Although many polymers possessing 9,9-diarylfluorene moieties in the main chain have been developed to date, there is no study on polyethers.…”

Synthesis and Properties of Polysiloxanes Possessing 9,9-Diarylfluorene Structure in the Main Chain

“…In addition, such polymers exhibit other characteristic properties including fine dispersing ability for inorganic fillers, 13,14 good solubility toward organic solvents, 15 high thermal stability, [16][17][18][19] and so on. [20][21][22][23][24] Although several studies directed toward optical use of 9,9-diarylfluorene-based high performance polymers have been reported, the polymers often suffer from low heat-processability due to the high glass transition temperature (T g ). [16][17][18][19] As a potential solution to this issue, we postulated that the siloxane linkage in the main chain would serve as an effective linker, because polysiloxanes generally exhibit low T g in addition to high thermal stability.…”