The use of photoinitiated free-radical cyclopolymerization in the preparation of novel side-chain liquid-crystalline polydienes

✍ Scribed by Alan William Hall; David Lacey; Peter Ian Buxton

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 367 KB
• Volume: 17
• Category: Article
• ISSN: 1022-1336
• DOI: 10.1002/marc.1996.030170608

✦ Synopsis

Abstract

The technique of photoinitiated free‐radical cyclopolymerization has been used to produce a variety of novel side‐chain liquid‐crystalline (SCLC) polymers in which an alicyclic ring structure is incorporated into a polymer backbone. Most of the SCLC polymers gave glass transition temperatures (T~g~) around room temperature and clearing points around 60–70°C. However, the poly(1,5‐hexadiene) was the exception to this, exhibiting a T~g~ value of 14.5°C and a clearing point of 132.5°C. Confirmation of the structure of the alicyclic ring along the polymer backbone is extremely difficult to obtain, but evidence is given in the paper to support the ring structure.