Article
  • Semiflexible Chain Behavior of Poly(terephthaloyl- 1-(2-aminoethyl) piperazine]
  • Ha HS, Lee DC
  • Poly[terephthaloyl-1-(2-aminoethyl)piperazine]연쇄의 굴곡성
  • 하헌승, 이동주
Abstract
Intrinsic viscosities [η] of poly[terephthaloyl-1-(2-aminoethyl)piperazine] PTAP) in mcresol at 25℃ were determined for well fractionated samples ranging in number average molar mass from 1.33 x 104 to 9.88 x 104 g/mol. The measured values of [η] indicated the chain conformation of PTAP to change continuously from a semiflexible chain to a long extended coil with an increase in molar mass. Viscometric data analysis on the basis of Bohdaneckey theory for worm-like cylinders yielded values 4.35nm, 260nm-1, and 1830 x 10-4nm which were assigned to the persistence length, the molar mass per unit contour length, and the root mean square end to end distance, respectively.

Poly[terephthaloyl-1-(2-aminoethyl)piperazine](PTAP)의 분별시료들에 대한 극한점성도계수를 측정하여 주사슬의 유연성 변화를 검토하였다. 분별시료들의 수평균 분자량 범위는 1.33 x 104에서 9.88 x 104g/mol이었고, 본성점도는 25℃, m-cresol용액을 사용하여 측정하였다. 이들 값으로부터 PTAP의 입체적 분자형태가 분자량 증가에따라 반굴곡성 형태로부터 확장된 coil형으로 변하는 것을 확인하였으며 Bohdanecky이론에 근거한 worm-like cylinder의 model parameter값들을 산출한 결과 persistence length(q)값이 4.35nm, 단위 contour length당 분자량(ML)이 260nm-1 , 및 root평균 양말단간 거리[(2>0/M)1/2 ]값이 1,830 x 10-4nm인 것으로 밝혀졌다.

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 1991; 15(2): 175-181

    Published online Apr 25, 1991