The Effect of Catalysts on the Formation of Ether-links in the Preparation of Poly (Ethylene Terephthalate)

DOI 2 Citations

Bibliographic Information

Other Title
  • 〔68〕 ポリエチレンテレフタレート中のエーテル結合生成に対する触媒の影響

Description

Polycondensation of bis (β-hydroxyethyl) terephthalate was carried out in the presence of various catalysts. The catalysts used had influence on the melting point and diethylene glycol content of poly (ethylene terephthalate). The decrease of melting point of poly (ethylene terephthalate) may be due to the increasing amount of diethylene glycol units in the polymer main chain.<BR>Compounds of Ti (IV), Co (II), Zn (II) and Sb (V) gave polyesters with rather lower melting point than those of the polyesters obtained by using compounds of Ca (II), Mn (II), Fe (III), Sb (III) and Pb (II) as catalyst. Using the catalysts which gave polyesters with high value in the carboxyl end groups, diethylene glycol contents of the polyesters were also high.<BR>Experiments on model compounds showed that the following two modes of reaction migth be expected for the formation of ether-links during the polycondensation of bis (β-hydroxyethyl) terephthalate:<BR>1) Dehydration of alcohol catalyzed by the Bronsted's acid which was formed from the catalyst.<BR>2) Addition reaction of hydroxyl group with an active fragment (CH2 CH2 O) which was formed by the decomposition of hydroxyethyl end groups of poly (ethylene terephthalate).

Journal

  • Kobunshi Kagaku

    Kobunshi Kagaku 24 (267), 472-478, 1967

    The Society of Polymer Science, Japan

Citations (2)*help

See more

Details 詳細情報について

  • CRID
    1390001206519987968
  • NII Article ID
    130004032683
  • DOI
    10.1295/koron1944.24.472
  • ISSN
    18848079
    00232556
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

Report a problem

Back to top