Article
  • Rheological Properties of HDPE/LDPE Binary Blends by Capillary Rheometer
  • Lee JO, Hong DH, Song KW, Lee JK, Ha CS, Cho WJ
  • 모세관 점도계에 의한 고밀도폴리에틸렌/저밀도폴리에틸렌 블렌드의 유변학적 물성
  • 이장우, 홍대환, 송기원, 이진국, 하창식, 조원제
Abstract
Rheological properties of high density polyethylene and low density polyethylene(LDPE)binary blends were investigated by using a capillary rheometer. Blends have been prepared by mixing the melts using a single screw in an extruder. Two types of LDPE, differing in degree of branching (mainly short-chain branches)were used for comparison. Melt viscosity and elastic recoverable strain were investigated as functions of shear rate(or shear stress) and blend ratio by capillary rheometer(L/D=40 and 80) measurements using the logarithmic empirical equation for the shear stress-strain relation. Temperature dependence of melt viscosity and elastic recoverable strain was analyzed by the chain rule of partial differential equation and compared with experimental results.

모세관점도계를 이용하여 고밀도폴리에틸렌과 저밀도폴리에틸렌(LDPE) 블렌드의 유변학적 물성에 대해 연구하였다. 블렌드는 압출기를 이용하여 용융혼합하여 제조하였는데 분지도가 다른 두 가지 LDPE를 사용하였다. 두 가지 모세관(L/D=40, 80)을 이용한 모세관 점도계를 전단응력-속도에 대한 대수실험으로부터 블렌드의 용융점도, 탄성회복변형을 전단속도 및 블렌드 조성의 함수로서 연구하였다. 또한, 용융점도와 탄성회복변형의 온도의존성을 편미분방정식의 chain rule에 의해 해석하고 실험과 비교 검토하였다.

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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

  • 1994; 18(2): 250-257

    Published online Mar 25, 1994