Poly(ether ether ketone)s containing benzene pendant in the molecular chain: Synthesis, characterization and optical properties

Abstract

A series of modified poly(ether ether ketone)s containing different content of benzene pendant group in the molecular chain have been successfully synthesized with 1,1-bis(4-hydroxyphenyl)-1-phenylethane, bisphenol A and 4,4′-difluorobenzophenone by nucleophilic substitution. The inherent viscosities of obtained polymers were in the range of 0.261–0.889 dLg−1. They were found to have high glass transition temperatures (Tg) of 150–168°C and 148–169°C (examined by DSC and DMA, respectively), good thermal stability with 5% weight-loss temperature (T5%) of 439–469°C. The tensile strengths of the obtained polymers were 67.7–86.6 MPa, and the storage modulus was over 0.9 GPa at about 140°C. The modified poly(ether ether ketone)s showed the excellent solubility property, they could be processed by solution method. Additionally, the obtained polymers had good optical transmittance (>70%) at 400 nm, suggesting that they have potential to be applied to the heat-resistant optical films.

Synthesis of novel poly(arylene ether amide) containing aliphatic ring for optical property

“…The modified PEEK that is synthesized by another bisphenol monomer (bisphenol A, bisphenol AP, bisphenol AF, bisphenol Z, and so on) and 4,4 ′ -difluorobenzophenone not only reduces its processing temperature, but also exhibits excellent solubility property; thus, they can be made into films by solution scraping. 7,12–14 Introducing trifluoromethyl in the side chain could also change the crystal structure of PEEK; the obtained PEEK derivant with trifluoromethyl can dissolve in many organic solvents and exhibited good dilectric property. 15 The processability of PEES was also improved well by incorporating semi-aromatic polyamides into the molecular chain.…”