Syntheses of semicrystalline aromatic poly(thioether thioether ketone)s (PTTK and PTBTK) and their copolymers with ether analogues

Yong Ding, Antisar R. Hlil, Allan S. Hay*, Eishun Tsuchida, Kenji Miyatake

*この研究の対応する著者

研究成果: Article査読

21 被引用数 (Scopus)

抄録

One-pot polymerization between bis(N,N′-dimethyl-S-carbamate)s and activated dihalo compounds was extended to the synthesis of semicrystalline poly(arylene thioether)s as well as their copolymers. Aromatic poly(thioether thioether ketone) (PTTK) and poly(thioether biphenyl thioether ketone) (PTBTK) were synthesized from 4,4′-difluorobenzophenone and bis(N,N′-dimethyl-S-carbamate)s prepared from hydroquinone and 4,4′-biphenol via the Newman-Kwart rearrangement reaction, respectively. Random copolymers were prepared by copolymerization of 4,4′-difluorobenzophenone with a mixture of bis(N,N′-dimethyl-S-carbamate)s or with a bis(N,N′-dimethyl-S-carbamate) and hydroquinone or 4,4′-biphenol. The reactions were carried out in benzophenone solution in the presence of a mixture of Cs2CO3 and CaCO3 as the bases at polymerization temperatures ranging from 200 to 300°C in order to keep the products in solution. All the polymers obtained were semicrystalline, as evidenced from the sharp melting points from the DSC scans for the polymers as prepared. However, the crystallization speeds for these polymers are very different depending on the compositions. The relationships between Tg, Tm, and structures are discussed. PTTK has a Tg of 136°C, Tm of 304°C, and an inherent viscosity of 0.32 dL/g in concentrated sulfuric acid, while PTBTK has a Tg of 173°C, Tm of 351°C, and an inherent viscosity of 0.46 dL/g.

本文言語English
ページ(範囲)315-321
ページ数7
ジャーナルMacromolecules
32
2
DOI
出版ステータスPublished - 1999 1 26

ASJC Scopus subject areas

  • 有機化学
  • ポリマーおよびプラスチック
  • 無機化学
  • 材料化学

フィンガープリント

「Syntheses of semicrystalline aromatic poly(thioether thioether ketone)s (PTTK and PTBTK) and their copolymers with ether analogues」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル