• Studies on the Characteristic Properties of Oriented Polypropylene Using Wide Angle X-ray Diffraction
  • Park JM, Eom KY
  • 광각 X-선회절을 이용한 Polypropylene의 연신거동 연구
  • 박제명, 엄규영
Abstract
Wide-angle X-ray diffraction has been used to investigate different crystallization behavior of casting polypropylene (CPP) and that of uniaxially, biaxially oriented isotactic polypropylene (iPP). It is proved that the crystal structure of CPP can be analyzed by contribution of amorphous to the crystal structure of quenched, α of iPP the processing and crystallization condition of CPP is well characterized by that structure. The occurence of b-axis orientation under mechanical drawing was also observed. Introducing the newly defined Kb-value(b-axis orientation index), which is relative intensity of (040) plane in α-crystal, orientation mechanism of iPP under drawing is well discribed.

광각 X-선회절을 이용하여 casting polypropylene (CPP)과 isotactic polypropylene (iPP)의 일축연신, 이축연신에 따른 결정화거동 연구를 수행하였다. 실험결과 CPP의 결정구조는 비결정 영역의 기여도에 따라 결정되는 냉각구조, α-결정구조를 이용하여 해석이 가능하며, 이를 통하여 CPP의 결정화조건, 가공조건에 대한 정보를 얻을 수 있었다. 또한 iPP 연신실험을 통하여 mechanical drawing에 의한 b-축 배향 현상을 관찰하였다. IPP의 b-축 배향을 새롭게 정의된 α-결정내 (040)면의 분포인 Kb-값(b-축 배향 지수)을 이용하여 해석할 수 있었으며, 이를 통하여 Kb-값의 높은 재연성을 확인할 수 있었다.

Keywords: isotactic polypropylene; crystallization; uniaxial; biaxial drawing; orientation; b-axis orientation indes; Kb-value

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  • Polymer(Korea) 폴리머
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This Article

  • 1997; 21(3): 419-425

    Published online May 25, 1997