Article
  • Gel-Spinning of Poly(ethylene terephthalate)
  • Seoul C, Kim SY, Jo WH
  • 폴리에틸렌 테레프탈레이트의 젤 방사
  • 설창, 김상용, 조원호
Abstract
The poly(ethylene terephthalate) gels were prepared by quenching the nitrobenzene solution of different molecular weight grade polymers and polymer concentrations. The gel melting temperature and the gelation temperature were measured by the differential scanning calorimetry(DSC). The gels which have polymer concentrations higher than 50 weight percent could be spun to form a filament. The gel-spun monofilaments were characterized by using scanning electron microscopy, birefringence measurement, stress- strain testing and DSC. The gel-spun monofilaments were drawn at varied draw temperatures and at desired draw ratios to study their effects on the drawability of the spun filaments, the molecular orientation, and the stress -strain relation of the drawn filaments. The maximum draw ratio is 8.5 at the draw temperature of 25℃ and decreases with the increase of the draw temperature up to 100%. The birefringence. the initial modulus, and the tensile strength of the drawn filament increase with the draw temperature and the draw ratio. The highest initial modulus and the maximum tensile strength were 20GPa and 0.75GPa, respectively, for the gel-spun filament drawn at 220℃, the length of which reached at five times its original length.

폴리에틸렌 테레프탈네이트를 나이트로 벤젠에 녹이고 급냉시켜 젤을 제조하였다. 젤 의 용해 온도와 젤화 온도를 시차열 분석법으로 측정하였다. 고분자 농도가 50중량% 이상인 젤은 방사가 가능했다. 방사하여 얻은 모노 필라멘트의 형태관찰, 복굴절 측정, 응력-변형률 관계, 열분석 측정 등을 행했다. 방사하여 얻은 모노 필라멘트를 여러 온도에서 연신하여 모노 필라멘트의 연신성, 분자배향 등을 검토하고 연신된 필라멘트의 응력-변형율 관계를 측정했다. 얻을 수 있는 최대 연신비는 상온에서 0.5이며 100℃까지는 감소했다. 복굴절,초기탄성률, 인장강도는 연신온도 및 연신비가 증가함에 따라 증가했다. 220℃에서 5배 연신한 연신물의 초기탄성률은 20GPa인장강도는 ().75GPa이었다.

Keywords:

  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 1988; 12(8): 730-739

    Published online Dec 25, 1988

  • 10.7317/pk.
  • Received on Nov 30, -0001
  • Revised on Nov 30, -0001
  • Accepted on Nov 30, -0001

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