Preparation and characterization of chiral polyacrylates end‐capped with bornyl groups in the side chains

Abstract

Chiral polyacrylates with bornyl end‐capped side chains with four kinds of mesogenic moieties (azobenzene, biphenyl, benzoyloxy biphenyl, and phenyl benzoate) were prepared. The phase properties of the polymers were investigated with X‐ray diffraction, differential scanning calorimetry, and polarizing optical microscopy. The thermogravimetric characteristics, the glass‐transition temperatures and weight‐average molecular weights, of the homopolymers were evaluated. The optical properties of the synthesized polymers in diluted solutions and in the thin‐film state were also evaluated. The optical behavior of the composite films upon photoirradiation was investigated through the change in the transmittance of the probe light triggered by ultraviolet (365‐nm) irradiation. Ultraviolet irradiation and heat treatment caused a reversible intensity change of the probe light at λ = 400 nm. The shrinkage of the photoisomerization of the composite films was also investigated with atomic force microscopy. A spot contraction appeared on the surface when it was irradiated with a laser light spot. The contraction was recovered by heat treatment at 80 °C for 10 min. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 1075–1092, 2004

Synthesis and characterization of optically active liquid crystalline polyacrylates containing mesogenic phenylbenzoate groups

“…The following monomers and chiral dopants were synthesized according to the similar procedures described in our previous reports [15,[17][18][19][20][21] and the literature [22]. 4-(6-Acryloyloxyhexyloxy) benzoic acid and 4-(6-acryloyloxy-undecyloxy) benzoic acid were synthesized following the processes reported in the literature [22].…”

“…In a series of studies, chiral monomers and chiral dopants were synthesized and their uses in the induction of cholesteric liquid crystal phases were also studied [15][16][17][18][19][20][21]. In the studies, the photochromic function was designed with azobenzene derivatives.…”

Photochemical tuning capability of cholesteric liquid crystal cells containing chiral dopants end capped with menthyl groups

“…The following novel chiral monomers were synthesized according to similar procedures described in the literature [16,[23][24][25][26]. The synthesized products were purified and then identified using FTIR and 1 H NMR.…”

“…Their optical properties and applications to LC cells and recording films were also studied [16][17][18][19][20]. Chiral monomers and polymers with end-capped menthyl groups were newly synthesized in the earlier study [21].…”

Synthesis and characterization of chiral polyacrylates and their applications as positive tone photoresists

“…To study the characteristics of functional monomers and polymers, a series of chiral dopants and cholesteric liquid crystal cells were synthesized and fabricated. [23][24][25][26][27][28][29][30] In earlier work, a novel crosslinking method for a negative tone photoresist comprised of pendant carboxyl groups in the presence of a photoacid was reported. 31 It is well known that high C/H content polymers can express high etching resistance for a photoresist.…”