✦ LIBER ✦

Synthesis, characterization, and photoreaction of photoreactive liquid crystalline block copolyetheresters

✍ Scribed by Nobuhiro Kawatsuki; Akihiro Kikai; Ryohei Fukae; Tohei Yamamoto; Osamu Sangen

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 191 KB
Volume: 35
Category: Article
ISSN: 0887-624X
DOI: 10.1002/(sici)1099-0518(19970715)35:9<1849::aid-pola26>3.0.co;2-4

No coin nor oath required. For personal study only.

✦ Synopsis

Photo-crosslinkable thermotropic liquid crystalline block copolyetheresters with photoreactive hard segment of poly(hexamethylene p-phenylenediacrylate) and soft segment of poly(tetramethylene ether) were synthesized by melt polycondensation from n-butyl-p-phenylenediacrylate, hexamethylene glycol, and poly(tetramethylene ether) glycol (PTMG, M n Å 1000-3000). The influence of molecular weight and composition of PTMG unit on the thermal behavior was determined by differential scanning calorimetry and polarized optical microscopy. All synthesized block copolymers show thermotropic liquid crystalline phase and can photo-crosslink by UV irradiation. Photoreaction of the copolymer thin film was carried out using Hg-UV light and investigated by FT-IR spectroscopy and a dynamic viscoelastic analyzer.

📜 SIMILAR VOLUMES

Synthesis and characterization of liquid

Synthesis and characterization of liquid crystalline (norbornene-block-acetylene) block copolymers

✍ Sebastian Koltzenburg; Markus Ungerank; Franz Stelzer; Oskar Nuyken 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 88 KB 👁 2 views

Synthesis and Characterization of Liquid

Synthesis and Characterization of Liquid Crystalline Alkylammonium Polyacrylates

✍ Emil C. Buruiana; Tinca Buruiana 📂 Article 📅 2002 🏛 John Wiley and Sons 🌐 English ⚖ 294 KB

Synthesis and characterization of block

Synthesis and characterization of block copolyetheresters with poly(tetramethylene 2,6-naphthalenedicarboxylate) segments

✍ Ruey-Shi Tsai; Yu-Der Lee 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 170 KB 👁 1 views

The block copolyetheresters with hard segments of poly ( tetramethylene 2,6-naphthalenedicarboxylate ) and soft segments of poly ( tetramethylene oxide ) were prepared by melt polycondensation of dimethyl 2,6-naphthalenedicarboxylate, 1,4-butanediol, and poly ( tetramethylene ether ) glycol ( PTMEG

Synthesis, thermal, and mechanical chara

Synthesis, thermal, and mechanical characterization of liquid-crystalline polyhydroxyethers

✍ Albert Bruggeman; Sebastiaan B. Damman; Alois H. A. Tinnemans 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 201 KB 👁 1 views

High molecular weight liquid-crystalline polyhydroxyethers, containing functional hydroxy groups, were synthesized from an aromatic diol and the diglycidylether of an aromatic diol. The polymers showed a liquid-crystalline melt when about 70% or more of the aromatic units in the chain were biphenyl

Synthesis and characterization of novel

Synthesis and characterization of novel chiral liquid crystalline polysiloxanes

✍ G.M. Day; H.J. Kim; W.R. Jackson; G.P. Simon 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 114 KB 👁 1 views

Synthesis of block and graft copolymers

Synthesis of block and graft copolymers containing liquid-crystalline segments

✍ Gomes, Ailton S; Barbosa, Celton A; Pinto, Mauricio R 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 157 KB 👁 2 views

Block and graft copolymers bearing amorphous or semi-crystalline and liquid-crystalline moieties were obtained by means of non-traditional synthetic routes. Chemical modi®cation of block and graft copolymer precursors by molecular liquid crystals and controlled radical block copolymerization between