폴리테트라메틸렌 에테르 글리콜

그림문자(GHS)

• 그림문자(GHS)

  

• 신호 어

  Warning

• 유해·위험 문구

  H412：장기적 영향에 의해 수생생물에 유해함

• 예방조치문구

  P273：환경으로 배출하지 마시오.

폴리테트라메틸렌 에테르 글리콜 화학적 특성, 용도, 생산

• 화학적 성질

  mp 11 - 38 °C 100 - 4,400 mPa.s @ 40 °C

• 제조 방법

  Low molecular weight polymers of tetrahydrofuran were introduced commercially in 1955. The polymers were intended for use in the preparation of flexible polyurethane foams, being terminated by hydroxyl groups:
  

  

  
  Although these polyethers produced good foams they were rather expensive and were soon displaced by the cheaper propylene oxide-based polyethers. However, these polymers of tetrahydrofuran (commonly called poly(oxytetramethylene)glycol) now find use in the preparation of polyamide, polyester and polyurethane thermoplastic elastomers.
  Details of the manufacture of polytetrahydrofuran have not been disclosed. Polymerization of tetrahydrofuran can be effected only by cationic initiators. Combinations of metal halides with water are not effective but protic acids (e.g. HCl04) and oxonium salts (e.g. (C2H5￡?3O+BF4-) are efficient initiators. Polymerization occurs by a ring-opening mechanism involving a tertiary oxonium ion, e.g.
  

  

• 정의

  ChEBI: A macromolecule composed of repeating oxybutylene units.

폴리테트라메틸렌 에테르 글리콜 공급 업체

Global(219)Suppliers

폴리테트라메틸렌 에테르 글리콜 관련 검색